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Standard Flange Nuts

Stainless Steel Fine-Thread Serrated Flange Nuts – 304 & 316

JUXIN FASTENERS supplies 304 and 316 stainless steel fine-thread serrated hex flange nuts for corrosion-resistant OEM equipment assemblies.

 The serrated flange engages compatible mating surfaces, while the fine-pitch thread provides an alternative to standard coarse-thread fastening where specified by the joint design. 

The original catalog lists M4–M20 and a natural stainless steel finish. 

ISO 10663 and EN 14218 are relevant references for certain M8–M20 fine-pitch flange nuts, subject to actual drawing and geometry verification. 

OEM sourcing support covers metric fine-thread and separately specified UNF inquiries, stainless steel galling prevention, torque–tension validation, material selection and custom production RFQs.


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Product Specification

Stainless Steel Fine-Thread Serrated Flange Nuts – 304 & 316 Corrosion-Resistant OEM Fasteners

Metric Fine-Pitch Hex Flange Nuts with Serrated Bearing Surfaces for Industrial Equipment and Custom Engineering Assemblies

JUXIN FASTENERS supplies stainless steel fine-thread serrated flange nuts for OEM manufacturers,

industrial equipment suppliers and international procurement teams requiring corrosion-resistant fastening components with precisely specified thread pitches.

The featured product combines a hexagon nut body, an integral serrated flange and a fine-pitch internal thread.

The serrated flange can engage a compatible mating surface to provide resistance to nut rotation. 

The fine-pitch thread provides an alternative to a standard coarse-thread connection when required by the joint design.

Material options identified in the original product specification include SUS304 and SUS316 stainless steel, with a natural metallic finish.

The original catalog identifies DIN 6923-1983 as its historical standard reference and lists nominal diameters from M4 through M20.

For international fine-thread applications, ISO 10663 and EN 14218 are additional relevant dimensional references. 

Their requirements must be checked against the actual product geometry and thread specification.

JUXIN FASTENERS supports drawing-based OEM sourcing for mechanical engineers, design engineers, production managers, 

manufacturing engineers, purchasing managers, supply chain teams and Tier-1 and Tier-2 manufacturers.

Product Overview and Technical Specifications

Product Name: Stainless Steel Fine-Thread Serrated Flange Nuts

Primary American Product Name: Stainless Steel Fine-Thread Serrated Flange Nuts

Alternative Product Names:

  • Fine-Pitch Stainless Steel Serrated Flange Nuts

  • Stainless Steel Fine-Thread Hex Flange Nuts

  • Metric Fine-Pitch Serrated Hex Nuts

  • 304 Stainless Steel Fine-Thread Flange Nuts

  • 316 Stainless Steel Fine-Thread Flange Nuts

  • 18-8 Stainless Steel Fine-Thread Flange Nuts

  • Fine-Thread Toothed Flange Nuts

  • Fine-Pitch Serrated Collar Nuts

  • Corrosion-Resistant Fine-Thread Flange Nuts

Original Material Options:

  • SUS304 Stainless Steel

  • SUS316 Stainless Steel

Related International Material Terminology:

  • 304-Type Stainless Steel

  • 316-Type Stainless Steel

  • 18-8 Stainless Steel, Where the Actual Grade Matches

  • A2 Stainless Steel, Where Applicable

  • A4 Stainless Steel, Where Applicable

Surface Finish: Natural Stainless Steel Finish

Flange Configuration: Serrated Integral Flange

Thread Configuration: Metric Fine Pitch, As Specified by Drawing

Original Nominal Diameter Range:

  • M4

  • M5

  • M6

  • M8

  • M10

  • M12

  • M14

  • M16

  • M20

Original Standard Reference: DIN 6923-1983

Relevant Fine-Pitch Flange Nut Standard: ISO 10663:2012

Related European Standard: EN 14218

Stainless Steel Mechanical Property Reference: ISO 3506-2:2020

Thread Standards: ISO 261, ISO 724 and ISO 965, As Applicable

Additional Inch-Series Thread Options: Subject to Separate Technical and Supply Confirmation

Manufacturing Basis: Approved Customer Engineering Drawings and Technical Specifications

Important Product Classification

This product is a fine-thread serrated flange nut.

It is different from a coarse-thread serrated flange nut, a plain flange nut and an all-metal prevailing-torque locknut.

The presence of serrations does not automatically establish a prevailing-torque locking mechanism.

What Are Fine-Thread Serrated Flange Nuts?

Fine-thread serrated flange nuts are internally threaded fasteners with a hexagon wrenching body and a toothed integral flange.

Their internal thread has a smaller pitch than the corresponding standard coarse-thread size.

The serrated flange is designed to engage a compatible mating surface during tightening.

Key Engineering Features

  • Fine-pitch internal threads.

  • Integral hexagon flange geometry.

  • Serrated bearing surface.

  • Corrosion-resistant stainless steel construction.

  • Natural metallic finish.

  • Potential resistance to loosening through serration engagement.

  • Compatibility with selected OEM mechanical assemblies.

The complete joint must be evaluated for its actual loads, vibration conditions and installation requirements.

Fine Thread vs. Coarse Thread Flange Nuts

Fine-pitch and coarse-pitch threads differ in their axial distance between adjacent thread crests.

For the same nominal diameter, a fine thread has a smaller pitch.

Fine-Pitch Threads

May be selected for applications requiring specific thread engagement, adjustment resolution or joint geometry.

Coarse-Pitch Threads

Are commonly used for general-purpose fastening and may be more tolerant of certain assembly and contamination conditions.

Engineering Comparison

Selection FactorFine ThreadCoarse Thread
Thread pitchSmallerLarger
Axial movement per revolutionLowerHigher
Adjustment resolutionFinerCoarser
Assembly sensitivityRequires careful pitch matchingRequires careful pitch matching
Cross-threading riskRequires controlled installationRequires controlled installation
Torque–tension behaviorJoint-dependentJoint-dependent
Vibration performanceMust be validatedMust be validated

Fine threads should not automatically be described as stronger or more vibration-resistant in every application.

Why OEM Engineers Specify Fine-Pitch Threads

Fine-pitch threads may be selected when the engineering design requires:

  • A particular mating bolt thread.

  • Controlled axial movement.

  • Specified thread engagement.

  • Limited axial packaging space.

  • Defined preload behavior.

  • Compatibility with an existing equipment design.

  • Specific automotive or machinery thread requirements.

The correct pitch is determined by the approved drawing.

ISO 10663 Fine-Pitch Flange Nut Standard

ISO 10663:2012 specifies characteristics for style 2 hexagon flange nuts with metric fine-pitch threads.

Its nominal diameter scope covers M8 through M20.

The standard is a useful international reference for engineers sourcing fine-thread flange nuts.

Important Verification Requirements

  • Nominal diameter.

  • Fine-thread pitch.

  • Nut height.

  • Width across flats.

  • Flange diameter.

  • Bearing surface geometry.

  • Dimensional tolerances.

  • Applicable material and mechanical properties.

The product must be checked against the selected standard edition and approved drawing.

DIN 6923-1983 vs. ISO 10663

The original catalog references DIN 6923-1983.

However, the product is identified as a fine-thread flange nut.

DIN 6923 should therefore be retained as the original historical drawing reference, not treated as automatic proof of compliance with ISO 10663.

ISO 10663 is the more directly relevant international reference for specified M8–M20 fine-pitch flange nut geometry.

Engineering Recommendation

For new OEM inquiries, specify the required thread and geometry independently rather than relying only on a historical standard number.

EN 14218 Fine-Pitch Flange Nuts

EN 14218 is a European standard covering specified fine-pitch hexagon flange nuts.

It is relevant to European OEM engineering and purchasing requirements.

The applicable edition, dimensional details and mechanical property requirements must be checked.

ISO 3506-2 Stainless Steel Mechanical Properties

ISO 3506-2:2020 covers specified stainless steel nuts with coarse and fine threads.

It includes mechanical property requirements and proof-load provisions for applicable stainless steel nut configurations.

Important Distinction

The standard does not establish:

  • Serration locking effectiveness.

  • Installation torque.

  • Torque–tension behavior.

  • Vibration resistance.

  • Stainless steel galling performance.

These characteristics require separate engineering validation.

Common Metric Fine-Thread Reference Sizes

The following table provides examples of commonly specified fine-pitch thread designations.

These are engineering reference examples, not a confirmed JUXIN inventory list.

Nominal DiameterExample Fine-Pitch Designations
M4M4 × 0.5
M5M5 × 0.5
M6M6 × 0.75
M8M8 × 1.0
M10M10 × 1.0, M10 × 1.25
M12M12 × 1.25, M12 × 1.5
M14M14 × 1.5
M16M16 × 1.5
M20M20 × 1.5, M20 × 2.0

The actual thread designation must be verified against the applicable thread standard and customer drawing.

Not every example is necessarily within the standard product range of ISO 10663.

Why M4–M6 Require Separate Verification

The original catalog lists M4, M5 and M6 nominal diameters.

However, ISO 10663:2012 covers M8–M20.

Therefore, M4–M6 fine-thread flange nuts should be reviewed as separate drawing-based configurations rather than automatically described as ISO 10663 products.

Metric Fine Threads vs. American UNF Threads

American procurement teams frequently use Unified National Fine, or UNF, thread terminology.

Metric fine threads and UNF threads are separate systems.

They are not directly interchangeable.

Common UNF Thread Designations for RFQ Reference

UNF ThreadThreads per Inch
1/4"-28 UNF28
5/16"-24 UNF24
3/8"-24 UNF24
7/16"-20 UNF20
1/2"-20 UNF20
9/16"-18 UNF18
5/8"-18 UNF18
3/4"-16 UNF16

These are reference thread designations, not confirmed stock sizes for the featured product.

Critical Thread Compatibility

M6 × 0.75 is not interchangeable with 1/4"-28 UNF.

M8 × 1.0 is not interchangeable with 5/16"-24 UNF.

M10 × 1.25 is not interchangeable with 3/8"-24 UNF.

Any UNF version must be specified, manufactured and inspected according to its own thread requirements.

UNC vs. UNF vs. Metric Fine Pitch

UNC, UNF and metric fine-pitch threads differ in their thread geometry and pitch systems.

UNC

Unified National Coarse.

UNF

Unified National Fine.

Metric Fine Pitch

ISO metric thread with a specified fine pitch in millimeters.

The customer should always provide the complete thread designation.

SUS304 Stainless Steel Fine-Thread Flange Nuts

SUS304 is a widely used austenitic stainless steel.

It provides corrosion resistance in many general industrial environments.

Potential Applications

  • Industrial machinery.

  • Electrical equipment.

  • Automation systems.

  • HVAC equipment.

  • General mechanical assemblies.

  • Selected outdoor enclosures.

Material Selection Considerations

  • Environmental exposure.

  • Cleaning chemicals.

  • Mating bolt material.

  • Mechanical property requirements.

  • Galling risk.

  • Corrosion resistance.

SUS316 Stainless Steel Fine-Thread Flange Nuts

SUS316 contains molybdenum and may provide improved resistance to certain chloride-containing environments compared with SUS304.

Potential Applications

  • Selected marine equipment.

  • Chemical processing machinery.

  • Pump and valve accessories.

  • Outdoor industrial equipment.

  • Food processing equipment.

  • Pharmaceutical equipment.

Important Limitation

SUS316 is not universally resistant to all chemicals or seawater exposure.

Pitting, crevice corrosion and galvanic corrosion remain possible.

304 vs. 316 Stainless Steel

Selection FactorSUS304SUS316
General industrial corrosion resistanceGoodGood
Resistance to some chloride exposureMore limitedGenerally improved
Molybdenum additionNot normally includedIncluded
General industrial equipmentCommonCommon
Selected marine applicationsRequires careful reviewOften considered
Material costOften lowerOften higher

The actual operating environment should determine the material selection.

18-8, A2 and A4 Material Terminology

American catalogs often use 18-8 stainless steel terminology for austenitic stainless steel fasteners.

European procurement commonly uses A2 and A4 material designations.

Important Clarification

SUS304 is commonly associated with 304-type or A2-type stainless steel.

SUS316 is commonly associated with 316-type or A4-type stainless steel.

However, A2-70 and A4-70 are mechanical property designations.

These grades must not be claimed without appropriate mechanical verification.

Serrated Flange Locking Principle

The flange underside contains raised teeth.

During tightening, the teeth contact the mating surface.

Where the mating material and installation conditions are suitable, the serrations engage the surface and resist relative rotation.

Performance Factors

  • Serration geometry.

  • Mating surface hardness.

  • Applied clamp force.

  • Surface coating.

  • Joint settlement.

  • Vibration.

  • Temperature.

  • Surface deformation.

Serrated flange nuts do not guarantee that every joint will remain tight under vibration.

Serrated vs. Plain Flange Nuts

Serrated Flange Nuts

Use teeth to engage compatible mating surfaces.

Plain Flange Nuts

Use a relatively smooth flange bearing surface.

Selection Guidance

A serrated flange nut may be considered where surface engagement is acceptable.

A plain flange nut may be preferred where surface marking must be avoided.

Serrated Flange Nuts vs. Prevailing-Torque Locknuts

Serrated flange nuts and prevailing-torque locknuts use different mechanisms.

A serrated flange nut relies on contact with the mating surface.

A prevailing-torque locknut uses a locking feature acting on the mating threads.

The two products should not be treated as identical.

Stainless Steel Thread Galling

Thread galling is a particularly important consideration for fine-thread stainless steel assemblies.

Galling is adhesive wear that can cause threads to seize during tightening.

Potential Symptoms

  • Rapidly increasing torque.

  • Difficult tightening.

  • Thread seizure.

  • Damaged mating threads.

  • Inconsistent clamp force.

  • Difficult disassembly.

Potential Prevention Measures

  • Confirm the exact mating thread.

  • Avoid cross-threading.

  • Use controlled installation speed.

  • Inspect thread condition.

  • Consider suitable mating materials.

  • Use approved lubrication where permitted.

  • Validate the installation process.

Lubrication changes friction and can affect preload.

Fine-Thread Installation and Torque–Tension Control

Fine-thread assemblies require careful installation control.

The relationship between tightening torque and achieved clamp force depends on:

  • Thread pitch.

  • Thread friction.

  • Serrated flange friction.

  • Stainless steel grade.

  • Mating bolt material.

  • Lubrication.

  • Surface condition.

  • Joint stiffness.

A tightening torque established for a coarse-thread nut should not automatically be applied to a fine-thread version.

The actual joint must be validated.

Flange Bearing Area and Washer Replacement

The integral flange provides a wider bearing area than a conventional hex nut.

In suitable joints, this may reduce the need for a separate flat washer.

Potential Benefits

  • Fewer loose components.

  • Simplified assembly handling.

  • Reduced washer installation steps.

  • Wider bearing contact.

Important Limitation

The serrated flange may mark or penetrate the mating surface.

It cannot automatically replace every washer used for sealing, electrical isolation or specialized load distribution.

Surface Damage and Corrosion Considerations

Serrated flange nuts may damage coatings on the mating material.

Examples include:

  • Painted steel.

  • Powder-coated panels.

  • Zinc-plated brackets.

  • Aluminum components.

  • Decorative metal surfaces.

Engineering Requirements

  • Confirm acceptable surface damage.

  • Evaluate exposed base metal.

  • Consider galvanic corrosion.

  • Check mating surface hardness.

  • Validate the finished assembly.

Galvanic Corrosion with Dissimilar Metals

Stainless steel fasteners may contact carbon steel, aluminum or other metallic components.

In the presence of an electrolyte, galvanic corrosion may occur.

Material selection and isolation measures should be reviewed where necessary.

Industrial Applications and Engineering Solutions

1. Automotive Mechanical Assemblies

Automotive equipment may require specified fine-thread fastening systems.

Engineering Challenge

Thread compatibility, corrosion resistance and assembly consistency are important.

Potential Solution

A stainless steel fine-thread serrated flange nut may be evaluated for suitable approved mechanical connections.

2. Electric Vehicle Equipment

EV systems contain brackets, enclosures and auxiliary mechanical components.

Engineering Challenge

Mechanical reliability and material compatibility influence fastener selection.

Potential Solution

A fine-pitch stainless steel flange nut may be considered where the joint requires that thread configuration.

Electrical isolation and battery safety requirements must be evaluated separately.

3. Industrial Pumps

Pump systems may contain mounting brackets and external support structures.

Engineering Challenge

Vibration, moisture and maintenance requirements affect fastener selection.

Potential Solution

A properly specified stainless steel serrated flange nut may be evaluated for compatible mechanical connections.

4. Industrial Valves

Valve assemblies may require corrosion-resistant accessory mounting hardware.

Engineering Challenge

Environmental exposure and mechanical loading affect joint performance.

Potential Solution

A fine-thread stainless steel flange nut may be considered for suitable external mounting connections.

Pressure-boundary applications require separate qualification.

5. Electric Motors

Electric motor assemblies contain mounting brackets and support components.

Engineering Challenge

Vibration and installation consistency influence joint reliability.

Potential Solution

A fine-pitch serrated flange nut may be evaluated where the mating surface and thread requirements are compatible.

6. Industrial Automation

Automation systems contain precision equipment frames and mechanical supports.

Engineering Challenge

Specified thread engagement and assembly repeatability are important.

Potential Solution

A fine-thread flange nut may be considered for drawing-approved mounting assemblies.

7. HVAC Equipment

HVAC equipment may experience condensation and mechanical vibration.

Engineering Challenge

Corrosion resistance and fastening performance influence material selection.

Potential Solution

304 or 316 stainless steel serrated flange nuts may be evaluated for suitable mechanical connections.

8. Chemical Processing Equipment

Chemical processing systems may contain external brackets and mechanical accessories.

Engineering Challenge

Chemical exposure affects fastener corrosion resistance.

Potential Solution

316 stainless steel may be considered where the actual chemical environment is compatible.

9. Food Processing Machinery

Food processing equipment may require corrosion-resistant fastening components.

Engineering Challenge

Cleaning chemicals and moisture can influence material selection.

Potential Solution

Stainless steel fine-thread flange nuts may be evaluated for selected external mechanical assemblies.

Food-contact and sanitary requirements must be verified separately.

10. Pharmaceutical Equipment

Pharmaceutical machinery may require controlled materials and surface conditions.

Engineering Challenge

Cleaning, contamination and corrosion requirements affect fastener selection.

Potential Solution

A suitable stainless steel flange nut may be evaluated for approved equipment assemblies.

11. Marine Equipment

Marine environments may expose fasteners to salt spray and chloride-containing moisture.

Engineering Challenge

Localized corrosion can affect stainless steel components.

Potential Solution

SUS316 may provide advantages over SUS304 in selected applications, subject to corrosion evaluation.

12. Electrical Cabinets

Electrical equipment manufacturers use brackets and support hardware.

Engineering Challenge

Mechanical assembly and corrosion resistance influence fastener requirements.

Potential Solution

A fine-thread stainless steel flange nut may be evaluated for appropriate bracket connections.

Electrical bonding requirements must be reviewed separately.

13. Semiconductor Equipment

Semiconductor equipment may require carefully specified stainless steel hardware.

Engineering Challenge

Material cleanliness, particle generation and precision assembly can be important.

Potential Solution

A stainless steel fine-thread flange nut may be considered for suitable external mechanical assemblies.

Serration-generated particles must be evaluated where cleanliness is critical.

14. AI Data Center Cooling Infrastructure

AI data center cooling systems contain pumps, heat exchangers and support frames.

Engineering Challenge

Mechanical reliability and environmental compatibility influence component selection.

Potential Solution

A fine-thread stainless steel flange nut may be evaluated for compatible equipment brackets.

15. Renewable Energy Equipment

Renewable energy equipment may operate in outdoor environments.

Engineering Challenge

Moisture, vibration and material compatibility affect fastener selection.

Potential Solution

A properly specified stainless steel serrated flange nut may be considered for suitable equipment assemblies.

16. Rail Transportation Equipment

Rail equipment may require controlled fastening systems for mechanical accessories and enclosures.

Engineering Challenge

Vibration and maintenance requirements influence joint design.

Potential Solution

A fine-thread stainless steel flange nut may be evaluated for approved non-critical mechanical connections.

Rail-specific safety and vibration requirements must be separately validated.

Production Management and Assembly Efficiency

For production managers, fine-thread serrated flange nuts require careful process control.

Important Production Considerations

  • Correct thread pitch identification.

  • Separation of coarse-thread and fine-thread inventory.

  • Nut-to-bolt compatibility.

  • Controlled thread starting.

  • Prevention of stainless steel galling.

  • Serration engagement.

  • Installation torque.

  • Clamp-force validation.

  • Tool calibration.

  • Lot traceability.

  • Assembly inspection.

  • Rework control.

Preventing Fine-Thread Assembly Errors

Fine-thread and coarse-thread nuts may appear visually similar.

Production teams should use clear part numbers and thread identification procedures.

Incorrect pitch selection can damage mating threads and create assembly failures.

Common Engineering Problems and Troubleshooting

Problem 1: Nut Does Not Fit the Bolt

Possible cause: Incorrect thread pitch or thread system.

Problem 2: Stainless Steel Galling

Possible causes: High friction, unsuitable installation speed or mating material conditions.

Problem 3: Insufficient Serration Engagement

Possible causes: Unsuitable mating surface hardness or inadequate clamp force.

Problem 4: Surface Damage

Possible causes: Serration engagement or excessive local bearing pressure.

Problem 5: Corrosion

Possible causes: Unsuitable stainless steel grade or aggressive environmental exposure.

Problem 6: Inconsistent Clamp Force

Possible causes: Friction variation or unsuitable tightening procedures.

Problem 7: Cross-Threading

Possible causes: Misalignment or incorrect thread starting.

Problem 8: Joint Loosening

Possible causes: Insufficient preload, joint settlement or unsuitable locking provisions.

Corrective actions must follow the approved engineering requirements.

Quality Inspection and OEM Validation

Quality requirements should be established by the approved engineering drawing and customer specification.

Dimensional Inspection

Potential characteristics include:

  • Nominal thread diameter.

  • Fine-thread pitch.

  • Thread tolerance.

  • Nut height.

  • Width across flats.

  • Flange outside diameter.

  • Flange thickness.

  • Serration geometry.

  • Critical dimensional tolerances.

Material Verification

Confirm SUS304 or SUS316 as specified.

Mechanical Property Verification

Verify the required stainless steel property class and proof-load requirements where applicable.

Functional Validation

Depending on the application, testing may include:

  • Thread compatibility.

  • Installation torque.

  • Torque–tension behavior.

  • Galling resistance.

  • Serration engagement.

  • Clamp-force performance.

  • Vibration performance.

  • Corrosion performance.

  • Mating surface damage.

OEM Quality Documentation

Depending on customer requirements, documentation may include:

  • Approved 2D engineering drawings.

  • 3D CAD files.

  • Material specifications.

  • Dimensional inspection reports.

  • Mechanical property test reports.

  • Corrosion test reports.

  • First article inspection.

  • Production traceability.

  • Process control records.

  • PPAP documentation, where applicable.

These are potential customer-defined deliverables and must be supported by actual manufacturing and inspection records.

Custom Fine-Thread Serrated Flange Nuts to Engineering Drawings

JUXIN FASTENERS supports custom inquiries for 304 and 316 stainless steel fine-thread serrated flange nuts.

Custom requirements may include:

  • Stainless steel grade.

  • Nominal thread diameter.

  • Exact fine-thread pitch.

  • Thread tolerance.

  • Nut height.

  • Width across flats.

  • Flange diameter.

  • Flange thickness.

  • Serration geometry.

  • Mechanical property class.

  • Natural surface finish.

  • Passivation requirements.

  • Corrosion resistance.

  • Mating surface compatibility.

  • Installation torque.

  • Inspection criteria.

  • Packaging.

  • Production volume.

Manufacturing feasibility and quotation depend on the approved engineering specifications.

Frequently Asked Engineering and Procurement Questions

What are stainless steel fine-thread serrated flange nuts?

They are stainless steel hexagon nuts with fine-pitch internal threads and serrated integral flanges.

What is the American product name?

Stainless Steel Fine-Thread Serrated Flange Nuts.

What is the difference between fine thread and coarse thread?

Fine threads have a smaller pitch for the same nominal diameter.

Are fine-thread flange nuts automatically stronger?

No. Joint strength depends on material properties, thread engagement, geometry and loading.

Are fine threads more vibration-resistant?

Not automatically. Vibration resistance must be evaluated for the complete joint.

What is ISO 10663?

It is an international standard for specified M8–M20 fine-pitch hexagon flange nuts.

Does ISO 10663 cover M4–M6?

No. Those sizes require separate dimensional specification.

What is the difference between SUS304 and SUS316?

SUS316 may provide improved resistance in certain chloride-containing environments.

Are SUS304 nuts automatically A2-70?

No. A2-70 requires mechanical property verification.

Are SUS316 nuts automatically A4-70?

No. A4-70 requires mechanical property verification.

Can stainless steel fine threads experience galling?

Yes. Galling is an important installation concern.

Are serrated flange nuts the same as prevailing-torque locknuts?

No. They use different locking mechanisms.

Can serrations damage the mating surface?

Yes. They may mark or penetrate coatings.

Are metric fine threads interchangeable with UNF threads?

No. They are different thread systems.

Can JUXIN FASTENERS evaluate custom UNF flange nut inquiries?

Yes. UNF inquiries can be reviewed separately according to the supplied drawing and manufacturing requirements.

Request a Custom Stainless Steel Fine-Thread Serrated Flange Nut RFQ

JUXIN FASTENERS supports international OEM sourcing for SUS304 and SUS316 fine-thread serrated flange nuts, metric fine-pitch hex flange nuts and custom corrosion-resistant industrial fasteners.

For a new OEM program or an existing production component, please provide:

  • 2D engineering drawing or 3D CAD file.

  • Required standard and edition.

  • SUS304 or SUS316 material requirement.

  • Exact thread diameter and pitch.

  • Metric or UNF thread designation.

  • Thread tolerance.

  • Mechanical property class.

  • Mating bolt specification.

  • Nut height and width across flats.

  • Flange diameter and thickness.

  • Serration geometry.

  • Natural finish or passivation requirements.

  • Corrosion resistance requirements.

  • Installation torque or preload requirements.

  • Mating surface material and coating.

  • Quality and inspection requirements.

  • Initial order quantity.

  • Estimated annual production volume.

  • Target delivery schedule.

Our team can review the engineering specifications and discuss manufacturing feasibility, technical clarification and quotation.

JUXIN FASTENERS

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

Email: info@juxinfasteners.com

Submit Your Engineering Drawings for a Custom 304 or 316 Stainless Steel Fine-Thread Serrated Flange Nut RFQ.


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

Hexagon nuts with flange (Fine thread)


Hexagon nuts with flange (Fine thread)

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