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Nylon Locking Insert Nuts

6061 Aluminum Nylon-Insert Hex Lock Nuts – Anodized Colors

JUXIN FASTENERS manufactures lightweight 6061 aluminum nylon-insert hex lock nuts with customer-defined anodized colors for OEM and industrial assembly applications. 

These non-flanged prevailing-torque nuts combine an aluminum alloy body with a retained nylon locking insert, offering a lightweight fastening option for suitable bicycle accessories, mountain bike equipment, motorcycle accessories, motorsport instrumentation, precision machinery and electronics enclosures.

Listed metric sizes include M3, M4, M5, M6, M8, M10 and M12. 

Available color specifications may include green, titanium gray, silver, gold, fuchsia, sky blue, royal blue, orange, black, purple and wine red, subject to production confirmation. 

JUXIN supports custom dimensions, metric and UNC/UNF thread evaluation, approved finishes, OEM/ODM manufacturing and industrial batch production. 

The finished nut's mechanical performance, prevailing torque and operating conditions must be verified for the approved 6061 alloy temper and nylon insert design.


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Product Specification

6061 Aluminum Nylon-Insert Hex Lock Nuts – Anodized Colors

Lightweight Custom Aluminum Prevailing-Torque Locknuts for Bicycle, Mountain Bike, Motorcycle, Motorsport and Industrial OEM Manufacturing

JUXIN FASTENERS manufactures standard and custom-engineered industrial fastening components for international OEM, Tier-1 and Tier-2 manufacturing programs.

Our 6061 aluminum nylon-insert hex lock nuts combine a lightweight aluminum alloy body with a retained non-metallic locking insert. 

The insert creates prevailing torque when engaged with a mating threaded fastener, helping resist unintended rotational loosening in properly engineered assemblies.

These fasteners are also known as aluminum Nyloc-type nuts, aluminum nylon locking nuts, anodized aluminum hex locknuts and aluminum prevailing-torque nuts.

The product family is available for evaluation in multiple anodized colors, making it particularly relevant to OEM projects requiring lightweight hardware and appearance-matched components.

Applications may include performance bicycle accessories, mountain bike equipment, motorcycle accessories, racing instrumentation, robotics, electronic enclosures and specialized industrial equipment.

JUXIN FASTENERS supports OEM/ODM manufacturing, customer-specific dimensions, custom finishes, made-to-drawing production and industrial batch manufacturing.

Product Specifications

ParameterProduct Information
Product Name6061 Aluminum Nylon-Insert Hex Lock Nut
Alternative NamesAluminum Nyloc-Type Nut; Aluminum Prevailing-Torque Locknut
Body MaterialAluminum Alloy 6061
Material TemperCustomer-Specified and Verified
Locking MechanismRetained Nylon Insert
Body ConfigurationHexagonal, Non-Flanged
Featured FinishColored Anodized Appearance
Other Finish OptionsPolishing or Specified Coating, Subject to Review
Listed Metric SizesM3, M4, M5, M6, M8, M10, M12
Custom ThreadsMetric, UNC or UNF, Subject to Feasibility
Color OptionsGreen, Titanium Gray, Silver, Gold, Fuchsia, Sky Blue, Royal Blue, Orange, Black, Purple, Wine Red
Product DesignCustomer-Approved Engineering Drawing
ManufacturingOEM/ODM and Industrial Batch Production

The listed specifications describe the product family. Individual size, color, temper and thread combinations must be confirmed against current production records.

What Is a 6061 Aluminum Nylon-Insert Lock Nut?

A nylon-insert lock nut is an internally threaded fastener with a non-metallic insert retained near one end of the nut.

As the mating bolt enters the insert, the polymer locally deforms and creates resistance to rotation.

This resistance is known as prevailing torque.

Unlike a conventional free-spinning hex nut, a nylon-insert locknut generates additional rotational resistance during installation and removal.

The nylon insert helps resist unintentional loosening but does not replace the need for correct joint preload, sufficient thread engagement or an approved assembly procedure.

Why Use Aluminum Alloy 6061?

6061 is an aluminum-magnesium-silicon alloy widely used for machined components.

It is valued for its combination of relatively low density, machinability and suitability for selected surface finishing processes.

Its mechanical properties depend on temper, product form and processing history.

For example, 6061-T6 and annealed 6061 have different mechanical properties.

Therefore, specifying only "6061 aluminum" is insufficient when a finished nut must meet defined proof-load or thread-strength requirements.

Material Density Comparison

MaterialApproximate Density
Aluminum Alloy 60612.70 g/cm³
Grade 5 Titanium4.43 g/cm³
Carbon Steel7.85 g/cm³
Stainless Steel7.9–8.0 g/cm³

For the same solid metal volume, 6061 aluminum is approximately 66% lighter than carbon steel.

Actual finished component weight depends on geometry.

A lighter nut is not automatically suitable for the same mechanical load as a steel nut.

Engineering Benefits of 6061 Aluminum

Potential benefits include:

  • Low material density.

  • Suitability for precision machining.

  • Nonmagnetic material characteristics.

  • Decorative anodized color options.

  • Corrosion resistance in suitable environments.

  • Custom dimensions and appearance.

  • Reduced component mass for appropriate assemblies.

These benefits must be considered alongside aluminum thread strength, fatigue, bearing pressure and environmental compatibility.

Aluminum vs. Steel Nylon-Insert Locknuts

Engineering Factor6061 AluminumCarbon Steel
DensityApproximately 2.70 g/cm³Approximately 7.85 g/cm³
Component WeightLower for Equal GeometryHigher for Equal Geometry
Material StrengthDepends on TemperDepends on Property Class
Thread LoadabilityRequires Aluminum-Specific ValidationGoverned by Applicable Steel Specifications
Decorative AnodizingSuitable for Defined ProcessesNot Conventional Aluminum Anodizing
Typical Selection DriverLightweight, Appearance-Sensitive AssembliesBroad Structural and Machinery Applications

Aluminum nuts must not automatically replace steel Class 8, Class 10 or inch-series Grade N5/N8 locknuts.

The complete fastening joint must be reviewed before substitution.

How the Nylon Locking Insert Works

The retained nylon insert produces interference with the mating bolt thread.

The resulting friction generates prevailing torque.

Important performance variables include:

  • Insert material formulation.

  • Insert geometry.

  • Thread dimensions.

  • Mating bolt material.

  • Bolt surface finish.

  • Installation speed.

  • Temperature.

  • Lubrication.

  • Reuse history.

  • Chemical exposure.

The prevailing-torque performance of the finished aluminum nut must be established through an agreed test procedure.

Is an Aluminum Nylon-Insert Nut an All-Metal Locknut?

No.

An all-metal prevailing-torque nut typically relies on controlled deformation of a metallic section.

An aluminum nylon-insert locknut uses a non-metallic insert to generate its primary locking resistance.

The two locking mechanisms should not be confused.

Anodized Aluminum Locknuts: Color and Surface Engineering

Colored anodized aluminum nuts are especially relevant to performance equipment where visible fasteners contribute to the appearance of the finished assembly.

The product family may include:

  • Green.

  • Titanium gray.

  • Silver.

  • Gold.

  • Fuchsia.

  • Sky blue.

  • Royal blue.

  • Orange.

  • Black.

  • Purple.

  • Wine red.

Colors must be confirmed against approved manufacturing specifications.

Color Anodizing

Anodizing creates an aluminum oxide layer through an electrochemical process.

Color may be introduced through an appropriate dyeing or coloring process.

Appearance depends on:

  • Alloy composition.

  • Surface preparation.

  • Anodizing conditions.

  • Dye selection.

  • Sealing.

  • Surface texture.

  • Inspection lighting.

Polishing

Polishing changes surface texture and reflectivity.

It may be used before anodizing or as part of another approved finishing process.

PVD and Other Coatings

PVD is a separate coating process and should not be treated as equivalent to anodizing.

If a customer requests PVD, the coating system, appearance and functional requirements must be specified independently.

OEM Color Matching

For appearance-sensitive products, customers should provide an approved physical color sample.

The manufacturing specification should define acceptable variations in hue, gloss, surface texture and cosmetic appearance.

Different anodized production batches may exhibit visible variation.

A website photograph alone is not a sufficient production acceptance standard.

Metric Thread Sizes and Inch Diameter References

The listed product family includes M3, M4, M5, M6, M8, M10 and M12.

The following table provides standard metric coarse-thread references and nominal diameter conversions.

Metric ThreadCoarse PitchNominal Diameter in Inches
M30.50 mm0.1181 in
M40.70 mm0.1575 in
M50.80 mm0.1969 in
M61.00 mm0.2362 in
M81.25 mm0.3150 in
M101.50 mm0.3937 in
M121.75 mm0.4724 in

The pitches shown are standard coarse-thread references and do not confirm the pitch of every existing production part.

Final thread dimensions and tolerances must follow the approved drawing.

The inch values represent nominal diameter conversions only.

They are not interchangeable inch-series thread specifications.

UNC and UNF Thread References for American OEM Customers

American OEM buyers may require Unified National Coarse or Unified National Fine threads.

JUXIN FASTENERS can evaluate custom inch-series aluminum locknut designs based on engineering drawings.

US Nominal ThreadUNCUNF
#4#4-40#4-48
#6#6-32#6-40
#8#8-32#8-36
#10#10-24#10-32
1/4 in1/4-201/4-28
5/16 in5/16-185/16-24
3/8 in3/8-163/8-24
7/16 in7/16-147/16-20
1/2 in1/2-131/2-20
9/16 in9/16-129/16-18
5/8 in5/8-115/8-18
3/4 in3/4-103/4-16

These are standard thread references for engineering evaluation.

They do not establish inventory availability or confirmed manufacturing capability for every size.

Metric and Inch Threads Are Not Interchangeable

Metric, UNC, UNF, BSW and BSF threads are different systems.

Examples:

  • M6 × 1.0 is not interchangeable with 1/4-20 UNC.

  • M8 × 1.25 is not interchangeable with 5/16-18 UNC.

  • M10 × 1.5 is not interchangeable with 3/8-16 UNC.

Similar nominal diameters do not establish thread compatibility.

Performance Bicycle Manufacturing

Bicycle manufacturers may evaluate lightweight aluminum nylon-insert nuts for approved accessory assemblies.

Potential applications include:

  • Bicycle computer brackets.

  • Lighting mounts.

  • Sensor brackets.

  • Accessory carriers.

  • Non-critical equipment holders.

  • Custom cycling product accessories.

Colored anodized nuts may coordinate with bicycle frames, handlebars, pedals and other visible components.

The specific fastener must be qualified for its actual mechanical role.

6061 Aluminum Nylon-Insert Hex Lock Nuts – Anodized Colors

Mountain Bike and MTB Accessories

Mountain bike equipment may experience vibration, impact, moisture and repeated maintenance.

Potential applications include approved:

  • Accessory mounting brackets.

  • Bicycle computer holders.

  • Lighting accessories.

  • Non-critical equipment fixtures.

  • Sensor mounting hardware.

Engineers should consider aluminum thread strength, fatigue, prevailing-torque retention, corrosion and installation procedures.

Aluminum nylon-insert nuts must not automatically replace specified fasteners in brakes, steering, suspension pivots or wheel-retention systems.

Road Cycling and Lightweight Performance Equipment

Road cycling products often place emphasis on component mass and appearance.

6061 aluminum locknuts may be considered for suitable low-load accessory assemblies.

Potential benefits include lightweight construction and matching anodized colors.

However, reducing weight should not compromise required joint strength or safety.

Motorcycle Manufacturing

Motorcycle accessory manufacturers may evaluate aluminum nylon-insert locknuts for selected low-load, non-critical assemblies.

Potential applications include:

  • Approved fairing accessories.

  • Instrumentation brackets.

  • Camera mounts.

  • Sensor brackets.

  • Lightweight equipment covers.

  • Non-critical accessory holders.

Motorcycle environments may involve vibration, temperature changes, moisture and repeated servicing.

The nylon insert's operating temperature and the aluminum body's loadability must be verified.

Safety-critical motorcycle connections require separately qualified fasteners.

Motorsport and Racing Equipment

Motorsport equipment manufacturers may evaluate colored aluminum locknuts for suitable auxiliary hardware.

Potential applications include:

  • Racing instrumentation.

  • Data acquisition brackets.

  • Lightweight electronics supports.

  • Non-critical equipment covers.

  • Workshop fixtures.

Aluminum nylon-insert nuts should not automatically replace high-strength steel locking nuts in racing chassis, suspension, braking or drivetrain assemblies.

High temperatures may also limit nylon insert suitability.

Automotive OEM Manufacturing

Automotive manufacturers may consider custom aluminum locknuts for selected lightweight auxiliary components.

Potential applications include approved:

  • Sensor brackets.

  • Instrumentation fixtures.

  • Non-critical accessory mounts.

  • Lightweight equipment covers.

Engineering approval must account for vibration, temperature, fatigue and mating materials.

AI Data Center Metal Cabinet Manufacturing

AI data center infrastructure includes server cabinets, power distribution enclosures, cooling equipment and auxiliary instrumentation.

Potential applications include suitable:

  • Cabinet accessory brackets.

  • Cable-management fixtures.

  • Sensor mounts.

  • Non-critical equipment covers.

  • Lightweight mounting accessories.

Engineers should review:

  • Joint preload.

  • Sheet metal thickness.

  • Mating thread material.

  • Electrical grounding.

  • Galvanic compatibility.

  • Maintenance requirements.

  • Service temperature.

A nylon-insert aluminum nut does not automatically provide electrical insulation.

Where one-sided assembly is required, rivet nuts or self-clinching fasteners may be more suitable.

Telecommunications Equipment Manufacturing

Potential applications include:

  • Telecom cabinet accessories.

  • Antenna instrumentation brackets.

  • Cable-management hardware.

  • Lightweight equipment covers.

  • Non-critical mounting fixtures.

Outdoor telecom applications require evaluation of corrosion, moisture, UV exposure of exposed polymers and thermal cycling.

Semiconductor Equipment Manufacturing

Semiconductor equipment may require strict cleanliness, material compatibility and controlled assembly.

Potential applications include non-process:

  • Instrumentation brackets.

  • Auxiliary equipment fixtures.

  • Equipment covers.

  • External sensor mounts.

Nylon inserts may be unsuitable for certain vacuum, cleanroom, high-temperature or chemical-processing environments.

Electrical Power Equipment Manufacturing

Potential applications include approved:

  • Electrical cabinet accessories.

  • Instrumentation brackets.

  • Control enclosure hardware.

  • Non-critical equipment fixtures.

Electrical continuity, grounding, insulation and contact resistance must be evaluated independently.

Aluminum locknuts should not be selected for current-carrying connections without appropriate engineering qualification.

Energy Storage and Renewable Energy Equipment

Potential applications include auxiliary:

  • Monitoring equipment mounts.

  • Energy storage cabinet accessories.

  • Solar instrumentation fixtures.

  • Lightweight enclosure components.

Thermal cycling, corrosion, vibration and electrical safety requirements must be assessed.

Rail Transit Equipment Manufacturing

Potential applications include approved non-critical:

  • Instrumentation brackets.

  • Equipment accessories.

  • Maintenance fixtures.

  • Lightweight enclosure hardware.

Rail equipment may require specific vibration, fire, smoke, fatigue and environmental performance.

The complete fastening system must be qualified.

Marine Equipment Manufacturing

Aluminum fasteners may be evaluated for selected marine accessories where low weight is relevant.

Potential applications include non-critical instrumentation mounts and equipment covers.

However, galvanic corrosion can occur when aluminum contacts dissimilar metals in conductive environments.

Engineers must evaluate:

  • Mating materials.

  • Saltwater exposure.

  • Coating integrity.

  • Crevice conditions.

  • Joint load.

  • Maintenance requirements.

Anodizing alone does not guarantee suitability for all marine environments.

Food Machinery Manufacturing

Potential applications include suitable external machinery accessories and non-food-contact equipment fixtures.

Food machinery may involve washdown chemicals, high temperatures and hygiene requirements.

Aluminum and nylon compatibility must be reviewed.

No food-contact or hygienic-design certification is claimed.

Medical Equipment Manufacturing

Potential applications include approved:

  • Laboratory instrument brackets.

  • Non-patient-contact equipment covers.

  • Lightweight mechanical accessories.

  • External instrumentation fixtures.

Cleaning, sterilization, material traceability and regulatory requirements must be evaluated.

A commercial aluminum nylon-insert nut is not automatically medical-device certified.

Electronics and Electrical Appliance Manufacturing

Potential applications include:

  • Lightweight equipment housings.

  • Instrumentation mounts.

  • Auxiliary brackets.

  • Approved appliance accessories.

Designers should consider operating temperature, electrical safety and assembly loads.

HVAC Equipment Manufacturing

Potential applications include:

  • Control cabinet accessories.

  • Instrumentation fixtures.

  • Lightweight equipment brackets.

  • Non-critical enclosure assemblies.

HVAC applications may involve vibration, humidity and temperature changes.

The insert material and aluminum body must be suitable for the actual environment.

Robotics and Industrial Automation

Robotics manufacturers may require compact, lightweight and precisely machined components.

Potential applications include:

  • Sensor brackets.

  • Instrumentation fixtures.

  • Lightweight equipment accessories.

  • Precision mechanical covers.

For moving assemblies, the engineer must evaluate fatigue, vibration, preload and thread strength.

Outdoor Equipment and Leisure Products

Colored aluminum nylon-insert nuts may be considered for suitable outdoor and recreational equipment accessories.

Potential applications include:

  • Camping equipment accessories.

  • Sporting equipment fixtures.

  • Lightweight display hardware.

  • Outdoor equipment brackets.

Environmental exposure and mechanical safety requirements must be assessed.

When Aluminum Nylon-Insert Locknuts May Not Be Appropriate

Alternative fasteners should be considered when:

  • High proof-load capacity is required.

  • The mating bolt strength exceeds the nut's verified capacity.

  • Operating temperature exceeds the nylon insert's validated range.

  • Repeated reuse reduces prevailing torque below the required level.

  • Chemical exposure is incompatible with the insert.

  • High fatigue loading requires a different joint design.

  • Galvanic corrosion risk cannot be controlled.

  • Safety-critical fastening specifications require another material or standard.

In such cases, steel, stainless steel or appropriately engineered all-metal locking nuts may be more suitable.

Aluminum Thread Strength and Joint Design

Aluminum threads generally require different loadability considerations from high-strength steel threads.

Important variables include:

  • Alloy temper.

  • Internal thread engagement.

  • Nut height.

  • Thread tolerance.

  • Mating bolt strength.

  • Tightening torque.

  • Joint preload.

  • Surface condition.

A 6061 aluminum locknut must not automatically be paired with a high-strength steel bolt at the same preload used for a steel nut.

Thread stripping, permanent deformation and fatigue must be evaluated.

Titanium or Stainless Steel Bolts with Aluminum Nuts

Dissimilar-metal assemblies require engineering review.

Potential concerns include:

  • Galvanic corrosion.

  • Different material strengths.

  • Friction variation.

  • Thread damage.

  • Thermal expansion.

  • Joint preload.

The correct mating bolt must be selected for the complete assembly.

Nylon Insert Temperature and Reuse

Nylon-insert performance depends on the actual polymer formulation and operating conditions.

A universal temperature rating must not be assumed.

Repeated installation and removal may change prevailing-torque performance.

Reuse should follow the applicable customer specification and verified test criteria.

Installation and Assembly Recommendations

Engineering considerations include:

  • Confirm the exact thread designation.

  • Inspect mating bolt threads.

  • Verify the nut orientation.

  • Ensure sufficient thread engagement.

  • Use appropriate assembly tools.

  • Control installation torque.

  • Account for prevailing torque.

  • Validate joint preload.

  • Follow approved reuse criteria.

  • Avoid damaging the anodized finish.

Installation torque must be established for the actual joint rather than copied from a steel locknut table.

JUXIN FASTENERS – Aluminum Locknut Manufacturing

JUXIN FASTENERS is an industrial fastener manufacturer supporting OEM/ODM projects and industrial batch production.

Our broader manufacturing capabilities include:

  • Cold heading.

  • Cold forming.

  • CNC machining.

  • Threading operations.

  • Product-specific secondary operations.

  • Customer-defined surface finishing.

  • Made-to-drawing production.

  • Industrial batch manufacturing.

The actual manufacturing process for 6061 aluminum locknuts depends on the alloy temper, component dimensions, production quantity and technical requirements.

CNC Machining

CNC machining may support:

  • Custom hex dimensions.

  • Special nut heights.

  • Precision internal threads.

  • Customer-specific geometry.

  • Small and medium production programs.

  • Specialized appearance requirements.

Cold Forming and Multi-Process Manufacturing

Cold forming is part of JUXIN FASTENERS' broader manufacturing capabilities.

However, not every 6061 aluminum nut is necessarily cold formed.

Process feasibility depends on alloy condition, geometry, tooling and production requirements.

Nylon Insert Assembly

The nylon insert must be retained according to the approved design.

Relevant manufacturing controls may include:

  • Insert dimensions.

  • Insert material.

  • Retention geometry.

  • Assembly consistency.

  • Functional prevailing-torque testing.

  • Visual inspection.

OEM/ODM Customization Options

JUXIN FASTENERS can evaluate:

  • Custom metric threads.

  • Custom UNC/UNF threads.

  • Customer-specific nut heights.

  • Modified wrenching dimensions.

  • 6061 temper requirements.

  • Special anodized colors.

  • Approved color matching.

  • Alternative surface finishes.

  • Custom nylon insert specifications.

  • Prevailing-torque requirements.

  • Proof-load requirements.

  • OEM packaging.

  • Annual batch production quantities.

All customization is subject to engineering feasibility review.

Engineering Support for OEM Teams

Design and Mechanical Engineers

Important considerations include aluminum thread strength, material temper, joint preload, locking performance and environmental compatibility.

Manufacturing Engineers

Key concerns include assembly tooling, installation torque, prevailing-torque consistency and protection of anodized surfaces.

Production Managers

Important factors include assembly repeatability, inspection criteria, batch color consistency, handling and packaging.

Procurement and Supplier Development Managers

Relevant requirements include approved drawings, material verification, sample approval, surface finish specifications, production feasibility and repeat-order quality.

Supply Chain Managers

Long-term OEM programs require coordination of engineering revisions, batch quantities, lead times, packaging and production schedules.

Quality Control and Engineering Verification

Depending on the customer-approved specification, inspection planning may include:

  • 6061 alloy verification.

  • Material temper documentation.

  • Thread dimensional inspection.

  • Across-flats measurement.

  • Nut height inspection.

  • Nylon insert retention.

  • First-on prevailing-torque testing.

  • Removal prevailing-torque testing.

  • Reuse-cycle testing where required.

  • Proof-load or thread-stripping evaluation.

  • Anodized finish appearance.

  • Color consistency.

  • Packaging and part identification.

Actual testing, acceptance criteria and documentation must be agreed for each project.

6061 Aluminum Nylon-Insert Hex Lock Nuts – Anodized Colors

Common Failure Modes and Prevention

Engineering ConcernPotential FailureRecommended Action
Excessive Bolt PreloadAluminum Thread StrippingVerify Nut Loadability
Incorrect TemperInsufficient Mechanical StrengthSpecify and Verify Temper
Repeated ReuseReduced Prevailing TorqueDefine Reuse Acceptance
Elevated TemperatureNylon Insert DegradationValidate Insert Temperature
Dissimilar Metal ContactGalvanic CorrosionReview Material Compatibility
Incorrect Installation TorqueJoint DamageValidate Assembly Procedure
Color VariationCosmetic RejectionApprove Master Color Sample
Incorrect Thread SystemThread DamageVerify Metric or UNC/UNF
Aggressive ChemicalsInsert or Finish DamageReview Chemical Compatibility

Material and Engineering Standards

Aluminum Alloy 6061

6061 is an aluminum-magnesium-silicon alloy.

The material temper and applicable product-form specification must be defined in the approved purchasing and manufacturing documents.

Where relevant, ASTM B221/B221M may be considered for qualifying extruded aluminum bar stock within its scope.

Other aluminum raw material forms may require different material specifications.

The selected raw material standard does not independently certify the finished nylon-insert locknut.

ISO Metric Screw Threads

Applicable ISO metric thread references include:

  • ISO 261 – General-purpose metric thread selection.

  • ISO 724 – Basic dimensions of metric threads.

  • ISO 965 series – Metric thread tolerances.

The exact thread designation and tolerance class must follow the approved engineering drawing.

ASME B1.1 – Unified Inch Screw Threads

ASME B1.1 provides requirements for Unified inch screw threads, including UNC and UNF designations.

It is a thread specification, not a complete aluminum nylon-insert locknut product standard.

ISO Nylon-Insert Nut Design References

ISO 10511:2025 addresses thin prevailing-torque hexagon nuts with non-metallic inserts.

ISO 7040:2025 addresses regular-height prevailing-torque hexagon nuts with non-metallic inserts.

ISO 7041:2025 addresses high prevailing-torque hexagon nuts with non-metallic inserts.

These product standards specify steel and stainless steel nuts within their respective scopes.

Their geometry may be useful as a design reference, but a custom 6061 aluminum nut must not automatically be declared fully compliant with them.

ASME B18.16.6 – Inch-Series Nylon-Insert Locknut Reference

ASME B18.16.6 provides requirements for defined inch-series nylon-insert locknuts.

Alternative materials require appropriate agreement on material selection, mechanical performance and other applicable requirements.

An aluminum nut must not automatically be assigned a carbon steel locknut grade.

Customer-Approved Engineering Drawings

The finished product should be controlled through approved drawings and specifications covering:

  • Nut geometry.

  • Thread dimensions.

  • Material temper.

  • Nylon insert design.

  • Surface finish.

  • Mechanical performance.

  • Prevailing torque.

  • Inspection methods.

  • Acceptance criteria.

Frequently Asked Questions

What is a 6061 aluminum nylon-insert lock nut?

It is an internally threaded 6061 aluminum nut with a retained nylon insert that creates prevailing torque during engagement with a mating bolt.

Is it an all-metal locknut?

No. Its primary locking mechanism uses a non-metallic nylon insert.

Is 6061 aluminum lighter than steel?

Yes. Its density is approximately one-third that of carbon steel.

Can these nuts be used on mountain bikes?

They may be evaluated for suitable lightweight accessory assemblies. Safety-critical bicycle joints require independently qualified fasteners.

Are colored aluminum locknuts anodized?

The featured product family uses colored anodized appearances. The actual finishing process must be confirmed for each production item.

What colors are listed?

Green, titanium gray, silver, gold, fuchsia, sky blue, royal blue, orange, black, purple and wine red.

What metric sizes are listed?

M3, M4, M5, M6, M8, M10 and M12.

Can custom UNC or UNF threads be manufactured?

JUXIN can review customer-specific inch-series designs according to engineering drawings and production feasibility.

Can metric and UNC threads be interchanged?

No. They are different thread systems.

Is 6061-T6 automatically used for every nut?

No. The material temper must be specified and verified for the actual product.

Can aluminum locknuts replace Class 10 steel locknuts?

Not automatically. Mechanical loadability and the complete joint design must be evaluated.

Can nylon-insert locknuts be reused?

Reuse depends on the insert condition, prevailing-torque performance and applicable acceptance criteria.

Are these suitable for high-temperature applications?

Only when the actual insert material and finished nut have been validated for the operating environment.

Are these aerospace-certified fasteners?

No aerospace certification is claimed for this commercial product.

Can JUXIN manufacture custom colors and dimensions?

Customer-specific colors, dimensions and material requirements can be evaluated through OEM/ODM engineering review.

Request a Quote – 6061 Aluminum Nylon-Insert Lock Nut Manufacturer

JUXIN FASTENERS manufactures standard and custom-engineered industrial fastening components for international OEM, Tier-1 and Tier-2 manufacturing programs.

We support lightweight aluminum locknut projects requiring custom metric or UNC/UNF threads, customer-defined anodized colors, 

approved material temper, specialized dimensions and prevailing-torque performance requirements.

Our broader manufacturing capabilities include cold heading, cold forming, CNC machining and product-specific secondary operations.

We welcome inquiries from bicycle and mountain bike equipment manufacturers, motorcycle accessory manufacturers,

 motorsport equipment producers, robotics companies, AI data center cabinet manufacturers, telecommunications equipment suppliers,

 electronics manufacturers, medical equipment producers and international industrial procurement teams.

Recommended RFQ Information

  • Required metric or UNC/UNF thread.

  • 6061 alloy temper.

  • Nut dimensions and drawing.

  • Nylon insert material requirements.

  • Mating bolt specification.

  • Required joint preload.

  • Prevailing-torque acceptance criteria.

  • Operating temperature and environment.

  • Anodized color and approved master sample.

  • Surface finish specification.

  • Mechanical performance requirements.

  • Inspection and testing criteria.

  • Order quantity and annual forecast.

  • Packaging and delivery requirements.

Please send your 2D drawings, 3D CAD files or technical specifications for engineering review and quotation.

JUXIN FASTENERS

Industrial Fastener Manufacturer | OEM/ODM Custom Fastener Manufacturing | Cold Heading, Cold Forming & CNC Machining | Made-to-Drawing Production

Email: info@juxinfasteners.com

Website: https://www.juxinfasteners.com/


Product Packaging

Packaging Standard

At Juxin Fasteners, we apply standardized export packaging to ensure product protection, traceability, and compliance with international logistics requirements.

1. Standard Export Packaging

Unless otherwise specified, all products will be packed according to our factory standard export packaging, which includes:

Moisture-resistant inner protection

Poly bag or small box packing as required

Reinforced export cartons

Clear labeling with part number, specification, batch number, and quantity

Palletizing for sea or air shipment when necessary

Our standard packaging is designed to ensure safe transportation, efficient warehousing, and long-distance international shipping.

2. Customized Packaging Options

We also provide customized packaging solutions according to customer requirements, including but not limited to:

Private labeling

Customized barcodes

Specific carton dimensions

Retail packaging

Special pallet configuration

Customer-specific marking and identification

So that you know, customized packaging may involve additional costs and extended lead time depending on the complexity of the requirements.

3. Compliance & Quality Assurance

All packaging processes are controlled under our ISO 9001 quality management system to ensure consistency, traceability, and product integrity throughout the supply chain.


Product Pictures

Aluminum alloy 6061 locking nut metal locking nut


Aluminum alloy 6061 locking nut metal locking nut

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