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Standard Flange Nuts

Serrated Hex Flange Nuts – DIN 6923, RoHS-Compliant Iridescent Zinc Plated

JUXIN FASTENERS supplies carbon steel Serrated Hex Flange Nuts with RoHS-compliant iridescent zinc plating for industrial OEM assemblies. 

The integrated flange distributes bearing pressure, while the serrated underside grips compatible mating surfaces to provide resistance to loosening under certain vibration conditions. 

The original range lists metric sizes M4–M20, separate inch-series options and mechanical property Classes 5, 6, 8 and 10, subject to verification. 

DIN 6923 is the primary dimensional reference, with ISO 898-2 and ISO 4042 relevant to mechanical properties and electroplated coatings. 

Explore serration engagement, coating compatibility, torque–tension control, industrial applications and custom bulk RFQs.


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Product Specification

Serrated Hex Flange Nuts – DIN 6923 Zinc-Plated Steel Fastening Solutions

RoHS-Compliant Iridescent Zinc-Plated Serrated Flange Nuts for OEM Machinery, Automotive Components and Industrial Equipment

JUXIN FASTENERS supplies carbon steel Serrated Hex Flange Nuts for industrial OEM manufacturers requiring an integral flange, 

serrated bearing surface and controlled fastening performance.

These hexagon flange nuts feature teeth on the underside of the flange.

When tightened against a compatible mating surface, the serrations engage the material and provide resistance to nut rotation.

The integrated flange also distributes bearing pressure over a larger contact area than a conventional hex nut of comparable size.

This combination can simplify selected mechanical assemblies and provide resistance to loosening under certain vibration conditions.

The featured product uses a RoHS-compliant iridescent zinc-plated finish.

In the American industrial fastener market, this product family is commonly called Serrated Flange Nuts or Serrated Hex Flange Nuts.

Related engineering and procurement terms include DIN 6923 Serrated Flange Nuts, Zinc-Plated Serrated Flange Nuts, 

Vibration-Resistant Flange Nuts, Serrated Collar Nuts and Hex Flange Nuts with Teeth.

JUXIN FASTENERS supports engineering drawing reviews and bulk OEM sourcing for automotive suppliers, machinery manufacturers, production managers,

 mechanical engineers, manufacturing engineers, purchasing managers and global supply chain teams.

Product Overview and Technical Specifications

Product Name: Serrated Hex Flange Nuts

Primary American Name: Serrated Flange Nuts

Engineering Name: Serrated Hexagon Flange Nuts

Alternative Names:

  • Metric Serrated Flange Nuts

  • DIN 6923 Serrated Flange Nuts

  • Serrated Steel Flange Nuts

  • Serrated Hex Flange Lock Nuts

  • Vibration-Resistant Flange Nuts

  • Serrated Collar Nuts

  • Toothed Flange Nuts

  • Zinc-Plated Serrated Flange Nuts

Material: Carbon Steel

Original Listed Mechanical Property Classes:

  • Class 5

  • Class 6

  • Class 8

  • Class 10

Featured Surface Treatment: RoHS-Compliant Iridescent Zinc Plating

Additional Original Surface Treatment Options:

  • Clear Zinc Plating

  • Blue-Passivated Zinc Plating

  • Zinc-Nickel Alloy Plating

  • Zinc-Flake Coating

  • Black Zinc Plating

  • Yellow Zinc Plating

Primary Product Standard Reference: DIN 6923

Related International Product Standard: ISO 4161, Subject to Dimensional Verification

Mechanical Property Reference: ISO 898-2

Electroplated Coating Reference: ISO 4042

Original Metric Size Range:

  • M4

  • M5

  • M6

  • M8

  • M10

  • M12

  • M14

  • M16

  • M20

Additional Thread Systems: Inch-Series Options Subject to Separate Specification Review

Product Configuration: Hexagon Nut with Integral Serrated Flange

Locking Principle: Serration Engagement with a Compatible Mating Surface

Manufacturing Basis: Approved Customer Engineering Drawings and Technical Specifications

Important Product Classification

The original catalog lists Classes 5, 6, 8 and 10.

These classes have different mechanical properties.

Class 8 and Class 10 variants must not be described as having identical strength.

The correct property class must be specified and verified for each OEM order.

What Are Serrated Hex Flange Nuts?

Serrated hex flange nuts are internally threaded hexagon fasteners with an enlarged circular flange and a toothed bearing surface.

The serrations are designed to engage the mating material during tightening.

This engagement may increase resistance to relative rotation.

The integrated flange can also reduce the need for a separate flat washer in suitable assemblies.

Key Engineering Characteristics

  • Hexagon wrenching body.

  • Integral circular flange.

  • Serrated underside.

  • Metallic serration engagement.

  • Carbon steel construction.

  • Optional mechanical property classes.

  • Protective coating options.

  • Compatibility with selected industrial assemblies.

The product's performance depends on the complete joint design, including the mating surface, bolt properties, tightening procedure and service environment.

How Serrated Flange Nuts Resist Loosening

The underside of the flange contains raised teeth or serrations.

During tightening, the serrations contact the mating surface.

With sufficient installation preload and a compatible surface material, the serrations can engage the material.

This engagement provides resistance to nut rotation.

Important Engineering Variables

  • Serration geometry.

  • Serration height.

  • Serration pitch.

  • Mating surface hardness.

  • Surface coating.

  • Applied clamp force.

  • Installation torque.

  • Joint vibration.

  • Joint settlement.

Serrated flange nuts are often described as vibration-resistant fasteners.

However, their performance depends on the actual assembly.

They should not be treated as a universal solution for all vibration-critical joints.

Serrated Flange Nuts vs. Plain Flange Nuts

The principal difference is the bearing surface.

Serrated Flange Nuts

Have teeth on the flange underside.

The serrations can engage the mating material and resist rotation.

Plain Flange Nuts

Have a relatively smooth bearing surface.

They distribute contact pressure but do not rely on serration engagement.

Selection Considerations

Choose serrated flange nuts when the joint design permits tooth engagement and surface marking.

Choose plain flange nuts when a smooth bearing surface is required.

The two designs are not automatically interchangeable.

Serrated Flange Nuts vs. Prevailing-Torque Locknuts

Serrated flange nuts and prevailing-torque locknuts use different locking principles.

Serrated Flange Nuts

Rely on engagement between the serrated flange and the mating surface.

Prevailing-Torque Locknuts

Generate resistance to rotation through a locking feature acting on the mating bolt threads.

Examples include:

  • Distorted-thread locknuts.

  • All-metal prevailing-torque nuts.

  • Nylon-insert locknuts.

A standard serrated flange nut does not necessarily generate prevailing torque before its flange contacts the mating surface.

Engineering Implication

The correct locking method must be selected according to the joint requirements.

Serration Damage and Surface Compatibility

Serrated flange nuts can mark or damage the mating surface.

This may be acceptable for some carbon steel structural brackets.

However, it may be undesirable for:

  • Painted surfaces.

  • Decorative panels.

  • Soft aluminum components.

  • Thin sheet metal.

  • Corrosion-sensitive coated surfaces.

  • Precision-finished parts.

Potential Risks

  • Coating penetration.

  • Local surface damage.

  • Loss of corrosion protection.

  • Surface deformation.

  • Inconsistent friction.

  • Joint settlement.

The mating surface must be evaluated before approving a serrated flange nut.

Can Serrated Flange Nuts Be Reused?

The mechanical strength of a nut does not necessarily disappear after one installation.

However, repeated installation may change the condition of the serrations, mating surface and protective coating.

Reuse Considerations

  • Serration wear.

  • Coating damage.

  • Thread damage.

  • Mating surface condition.

  • Prevailing assembly requirements.

  • Customer maintenance procedures.

Reuse should follow the approved OEM specification.

For critical joints, replacement may be required after removal.

Integral Flange and Bearing Pressure Distribution

The flange provides a larger bearing surface than a conventional hex nut.

This can distribute contact pressure over a wider area.

Potential Benefits

  • Reduced need for separate flat washers.

  • Simplified assembly handling.

  • Wider bearing contact.

  • Fewer loose components.

  • Improved assembly efficiency in suitable applications.

Important Limitation

A serrated flange does not automatically replace every washer.

Hardened washers, sealing washers and other specialized bearing components may serve different engineering functions.

Oversized and Irregular Clearance Holes

A flange may provide additional bearing coverage around a clearance hole.

However, the flange must maintain sufficient support around the hole.

Engineering Factors

  • Hole diameter.

  • Hole geometry.

  • Flange diameter.

  • Bearing area.

  • Joint material thickness.

  • Applied clamp force.

  • Hole position tolerance.

  • Edge distance.

The joint must be validated rather than assuming that the flange can accommodate any oversized hole.

DIN 6923 Serrated Hexagon Flange Nuts

DIN 6923 is a recognized reference for hexagon flange nut geometry.

It is widely used in European and international fastener sourcing.

The exact flange configuration and dimensions must match the selected standard and engineering drawing.

Important Dimensional Characteristics

  • Nominal thread diameter.

  • Thread pitch.

  • Nut height.

  • Width across flats.

  • Width across corners.

  • Flange outside diameter.

  • Flange thickness.

  • Serration geometry.

  • Thread tolerance.

  • Dimensional tolerances.

DIN 6923 and ISO 4161

ISO 4161 is a related international standard for hexagon nuts with flange.

However, the actual product dimensions, bearing surface and applicable standard edition must be checked.

Do not assume that every DIN 6923 product and ISO 4161 product is identical.

Metric Thread Sizes

The original product range lists:

  • M4

  • M5

  • M6

  • M8

  • M10

  • M12

  • M14

  • M16

  • M20

Common metric coarse-thread references include:

Nominal SizeCommon Coarse Pitch
M40.7 mm
M50.8 mm
M61.0 mm
M81.25 mm
M101.5 mm
M121.75 mm
M142.0 mm
M162.0 mm
M202.5 mm

These are nominal engineering references.

Actual pitch, dimensional conformity and availability must be confirmed for each ordered item.

Metric Fine-Pitch Serrated Flange Nuts

Some OEM applications require fine-pitch metric threads.

Potential requirements include:

  • Specific thread pitch.

  • Nut height.

  • Flange diameter.

  • Serration geometry.

  • Mechanical property class.

  • Coating.

  • Installation torque.

Fine-pitch variants require separate specification review.

Metric vs. UNC and UNF Flange Nuts

American buyers may request inch-series serrated flange nuts.

Common search terms include:

  • UNC Serrated Flange Nuts

  • UNF Serrated Flange Nuts

  • SAE Grade 5 Serrated Flange Nuts

  • SAE Grade 8 Serrated Flange Nuts

These are separate product configurations.

Metric and Unified inch-series threads are not directly interchangeable.

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.

Inch-series availability must be confirmed separately.

Carbon Steel Material and Mechanical Property Classes

The original product range identifies carbon steel with several mechanical property classes.

The appropriate class depends on the required joint strength.

Class 5 and Class 6

May be relevant to selected lower-strength or general-purpose assemblies.

Class 8

Is commonly associated with medium-strength metric steel nuts in industrial catalogs.

Class 10

Is commonly associated with high-strength metric steel nuts.

Engineering Requirements

  • Verify the actual property class.

  • Confirm the mating bolt strength.

  • Check thread engagement.

  • Validate the required clamp force.

  • Confirm proof-load requirements.

  • Review joint loading.

  • Follow the approved tightening procedure.

A higher property class should not be substituted solely on the assumption that it is always better.

ISO 898-2 Mechanical Properties

ISO 898-2 provides mechanical property requirements for specified carbon steel and alloy steel nuts.

It is an important reference for metric nut property classes.

For OEM sourcing, the applicable standard and product configuration must be verified.

Class 8 Nuts and Class 8.8 Bolts

Class 8 nuts may be used in appropriately specified assemblies involving suitable Class 8.8 bolts.

Class 10 Nuts and Class 10.9 Bolts

Class 10 nuts may be used in appropriately specified assemblies involving suitable Class 10.9 bolts.

However, the complete joint must still be evaluated.

These examples do not establish universal interchangeability.

RoHS-Compliant Iridescent Zinc Plating

The featured product uses an iridescent zinc-plated finish specified for RoHS-compliant applications.

Related industrial coating terminology includes:

  • Iridescent Zinc Plating.

  • Color Zinc Plating.

  • Yellow Iridescent Zinc Plating.

  • Zinc Plating with Trivalent Chromium Passivation, Where Specified.

  • RoHS-Compliant Zinc Plating.

How Zinc Plating Protects Carbon Steel

Zinc electroplating deposits a protective zinc layer onto the steel surface.

A passivation treatment may be applied to improve corrosion protection.

Certain passivation systems produce a multicolored or yellow-iridescent appearance.

The actual appearance depends on the coating chemistry.

RoHS Compliance

RoHS compliance depends on the restricted-substance content of the actual supplied component.

A yellow or iridescent appearance alone does not establish compliance.

For OEM procurement, supporting documentation should identify the applicable coating system and restricted-substance requirements.

ISO 4042 Electroplated Coating Systems

ISO 4042:2022 specifies requirements for electroplated coating systems on steel fasteners.

It addresses relevant zinc and zinc-alloy coating systems.

Potential Coating Requirements

  • Coating metal.

  • Coating thickness.

  • Conversion coating.

  • Passivation chemistry.

  • Sealer or topcoat.

  • Lubrication.

  • Corrosion performance.

  • Dimensional compatibility.

  • Hydrogen embrittlement risk controls.

Corrosion Resistance

Zinc plating provides sacrificial corrosion protection to carbon steel.

Actual performance depends on:

  • Zinc thickness.

  • Passivation.

  • Sealer.

  • Environmental exposure.

  • Handling.

  • Installation damage.

The original product information does not establish a specific salt spray rating.

Where required, the customer should specify the test method, duration and acceptance criteria.

Serrations and Coating Damage

Serrated flange nuts create localized contact pressure at the teeth.

During tightening, the teeth may penetrate coatings on the mating surface.

This can affect corrosion protection at the contact area.

For coated automotive and outdoor equipment assemblies, corrosion performance should be evaluated after installation.

Other Surface Treatment Options

The original product family lists:

  • Clear Zinc Plating.

  • Blue-Passivated Zinc Plating.

  • Zinc-Nickel Alloy Plating.

  • Zinc-Flake Coating.

  • Black Zinc Plating.

  • Yellow Zinc Plating.

These may be evaluated for customer-specific requirements.

Different coatings can affect:

  • Corrosion resistance.

  • Appearance.

  • Friction.

  • Coating thickness.

  • Environmental compliance.

  • Manufacturing process.

The selected coating must be compatible with the mechanical property class and intended application.

Zinc-Nickel and Zinc-Flake Options

Zinc-nickel plating may be considered for OEM programs requiring a specified zinc-alloy coating system.

Zinc-flake coatings may be considered for applications requiring non-electrolytic protective coatings.

These systems have different process characteristics.

They should not be treated as interchangeable without engineering validation.

Coating Friction and Torque–Tension Control

The tightening torque required to achieve a particular clamp force depends on friction.

For serrated flange nuts, friction may be influenced by:

  • Thread coating.

  • Flange coating.

  • Serration geometry.

  • Mating surface hardness.

  • Mating surface coating.

  • Lubrication.

  • Installation speed.

Important Engineering Requirement

A tightening torque approved for a plain flange nut should not automatically be applied to a serrated flange nut.

The actual torque–tension relationship must be validated for the selected assembly.

Industrial Applications and Engineering Solutions

1. Automotive Brackets and Mechanical Assemblies

Automotive OEMs may use serrated flange nuts in selected brackets, supports and equipment connections.

Engineering Challenge

Vibration and high production volumes require consistent assembly performance.

Potential Solution

A properly specified serrated flange nut may provide resistance to rotation when the mating surface permits tooth engagement.

2. Commercial Vehicle Accessories

Commercial vehicles may contain equipment brackets and auxiliary mounting systems.

Engineering Challenge

Repeated vibration can affect joint retention.

Potential Solution

A qualified serrated flange nut may be considered for suitable mechanical connections.

3. Industrial Machinery

Industrial machinery includes equipment frames, guards and mechanical supports.

Engineering Challenge

Vibration and installation consistency influence joint performance.

Potential Solution

A serrated flange nut may be evaluated for compatible steel bracket assemblies.

4. Agricultural Equipment

Agricultural machinery may operate under vibration, moisture and repeated mechanical loading.

Engineering Challenge

Fasteners require appropriate mechanical strength and corrosion protection.

Potential Solution

A zinc-plated serrated flange nut may be considered for suitable equipment connections.

5. Construction Equipment

Construction equipment may experience shock loading and vibration.

Engineering Challenge

Fastening components must meet the specified joint loads.

Potential Solution

A verified Class 8 or Class 10 serrated flange nut may be evaluated according to the approved design.

6. Pumps and Motors

Pump and motor installations often use mechanical support brackets.

Engineering Challenge

Operational vibration may affect threaded joints.

Potential Solution

A serrated flange nut may be considered where surface marking is acceptable and the joint design permits.

7. Industrial Automation Equipment

Automation systems use mechanical frames and mounting brackets.

Engineering Challenge

Assembly efficiency and component consistency affect production costs.

Potential Solution

An integrated serrated flange nut may simplify certain assemblies by eliminating a separate flat washer.

8. Electrical Equipment Enclosures

Electrical equipment manufacturers use brackets and mechanical support structures.

Engineering Challenge

Vibration and moisture exposure can affect mechanical fastening.

Potential Solution

A coated serrated flange nut may be considered for suitable mechanical connections.

Electrical grounding requirements must be evaluated separately.

9. HVAC Equipment

HVAC equipment contains fans, pumps and mechanical support frames.

Engineering Challenge

Vibration and condensation can affect joint performance.

Potential Solution

A zinc-plated serrated flange nut may be evaluated for compatible mounting brackets.

10. Renewable Energy Equipment

Renewable energy equipment may operate outdoors.

Engineering Challenge

Corrosion exposure and mechanical loading influence fastener selection.

Potential Solution

A serrated flange nut with a qualified protective coating may be considered where the joint design permits.

11. Power Distribution Equipment

Power distribution systems contain mechanical frames and support components.

Engineering Challenge

Mechanical fastening must remain consistent under the intended operating conditions.

Potential Solution

A suitable serrated flange nut may be evaluated for approved mechanical assemblies.

12. AI Data Center Cooling Equipment

AI data center infrastructure includes cooling equipment, pumps and mechanical supports.

Engineering Challenge

Continuous operation may expose certain connections to vibration.

Potential Solution

A serrated flange nut may be considered for compatible non-critical mechanical mounting applications.

13. Industrial Sheet Metal Assemblies

Sheet metal equipment often requires efficient threaded fastening.

Engineering Challenge

Thin materials may deform under localized pressure.

Potential Solution

A serrated flange nut may be considered only when the material thickness and surface hardness support the required engagement.

14. OEM Fabricated Steel Structures

OEM fabricators may use flange nuts in custom steel brackets and support systems.

Engineering Challenge

Standard hardware may not provide the required combination of flange diameter, strength and coating.

Potential Solution

A drawing-based serrated flange nut may be evaluated for custom geometry and production quantities.

Assembly Engineering and Installation

Correct installation is essential for serrated flange nuts.

Step 1: Verify the Mating Bolt

Confirm thread diameter, pitch and mechanical property class.

Step 2: Inspect the Nut

Check the threads, flange teeth and coating.

Step 3: Evaluate the Mating Surface

Confirm that serration engagement is permitted.

Step 4: Check Bearing Support

Verify that the flange has sufficient contact area.

Step 5: Start the Threads Correctly

Avoid cross-threading.

Step 6: Apply the Approved Tightening Procedure

Use the specified torque or tensioning method.

Step 7: Inspect the Finished Joint

Confirm seating, thread engagement and the required assembly condition.

Production Management and Assembly Efficiency

For production managers, serrated flange nuts can influence assembly cycle time and quality.

Potential Benefits

  • Fewer separate washer components.

  • Simplified parts handling.

  • Reduced risk of omitted washers.

  • Compatibility with selected automated assembly processes.

  • Integrated flange and serration geometry.

Production Control Factors

  • Nut feeding and orientation.

  • Serration condition.

  • Coating consistency.

  • Mating surface preparation.

  • Thread starting.

  • Tightening torque.

  • Clamp-force validation.

  • Tool calibration.

  • Rework.

  • Lot-to-lot consistency.

  • Traceability.

The actual assembly process should be validated before production release.

Common Engineering Problems and Troubleshooting

Problem 1: Insufficient Resistance to Loosening

Possible causes include inadequate clamp force or poor serration engagement.

Problem 2: Excessive Surface Damage

Possible causes include aggressive serration geometry or an unsuitable mating material.

Problem 3: Coating Damage and Corrosion

Possible causes include serration penetration or environmental exposure.

Problem 4: Thread Stripping

Possible causes include incompatible strength classes or excessive installation loading.

Problem 5: Inconsistent Clamp Force

Possible causes include friction variation or unsuitable tightening procedures.

Problem 6: Flange Bearing Damage

Possible causes include insufficient bearing support or excessive localized pressure.

Problem 7: Installation Difficulty

Possible causes include thread mismatch, coating thickness or damaged threads.

Problem 8: Joint Settlement

Possible causes include surface deformation or compression of the mating materials.

Corrective actions should follow the approved engineering requirements.

Quality Inspection and OEM Validation

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

Dimensional Inspection

Potential characteristics include:

  • Thread diameter.

  • Thread pitch.

  • Nut height.

  • Width across flats.

  • Flange diameter.

  • Flange thickness.

  • Serration geometry.

  • Critical dimensional tolerances.

Mechanical Property Verification

Potential requirements include:

  • Material verification.

  • Property class verification.

  • Proof-load testing.

  • Hardness testing.

  • Heat treatment verification, where required.

Coating Verification

Potential requirements include:

  • Zinc coating thickness.

  • Passivation chemistry.

  • Iridescent appearance.

  • Corrosion resistance.

  • Restricted-substance compliance.

  • Coating adhesion.

Functional Assembly Validation

Depending on the application, testing may include:

  • Thread compatibility.

  • Serration engagement.

  • Installation torque.

  • Torque–tension performance.

  • Clamp-force behavior.

  • Vibration resistance.

  • Joint retention.

  • Surface damage assessment.

OEM Documentation

Depending on customer requirements, documentation may include:

  • Approved engineering drawings.

  • Material specifications.

  • Mechanical test reports.

  • Dimensional inspection reports.

  • Coating specifications.

  • RoHS declarations.

  • Corrosion test reports.

  • First article inspection.

  • Production traceability.

  • Process control records.

  • PPAP documentation, where applicable.

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

Custom Serrated Hex Flange Nuts to Engineering Drawings

JUXIN FASTENERS supports drawing-based inquiries for metric serrated flange nuts, DIN 6923 hexagon flange nuts and custom coated threaded fasteners.

Custom requirements may include:

  • Thread diameter.

  • Thread pitch.

  • Nut height.

  • Width across flats.

  • Flange diameter.

  • Flange thickness.

  • Serration geometry.

  • Mechanical property class.

  • Steel material.

  • Heat treatment.

  • Iridescent zinc plating.

  • RoHS compliance.

  • Zinc-nickel coating.

  • Zinc-flake coating.

  • Coating thickness.

  • Corrosion resistance.

  • Torque–tension requirements.

  • Inspection criteria.

  • Packaging.

  • Production quantity.

Manufacturing feasibility and quotation depend on the approved technical specifications.

Frequently Asked Engineering and Procurement Questions

What are serrated flange nuts?

They are hexagon nuts with an integral flange and teeth on the underside.

What is the American product name?

Serrated Flange Nuts is a recognized American industrial catalog designation.

How do serrated flange nuts resist loosening?

Their serrations engage compatible mating surfaces and provide resistance to rotation.

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

No. They use different locking mechanisms.

Are serrated flange nuts reusable?

Reuse depends on the condition of the nut, serrations, mating surface and approved maintenance requirements.

Can serrations damage painted surfaces?

Yes. Serrations may penetrate or mark coatings.

Do serrated flange nuts require washers?

A separate flat washer may not be required in suitable assemblies, but the complete joint design must be reviewed.

What is DIN 6923?

DIN 6923 is a recognized German standard reference for hexagon flange nuts.

What is the difference between Class 8 and Class 10?

They have different mechanical property requirements. Class 10 is generally associated with higher-strength metric nuts.

What is iridescent zinc plating?

It is a zinc coating system with a passivated surface that may produce a yellow or multicolored appearance.

Does yellow zinc plating automatically meet RoHS?

No. Compliance depends on the actual coating chemistry and documentation.

Does the coating affect tightening torque?

Yes. Coating friction can affect the relationship between applied torque and achieved clamp force.

What metric sizes are listed?

M4, M5, M6, M8, M10, M12, M14, M16 and M20.

Are metric and UNC serrated flange nuts interchangeable?

No. Metric and UNC threads are not directly interchangeable.

Can JUXIN FASTENERS evaluate custom serrated flange nut drawings?

Yes. Customer-specific inquiries can be reviewed according to the supplied drawings and production requirements.

Request a Custom Serrated Hex Flange Nut RFQ

JUXIN FASTENERS supports OEM sourcing and engineering inquiries for serrated hex flange nuts, DIN 6923 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.

  • Metric or inch thread specification.

  • Thread diameter and pitch.

  • Required mechanical property class.

  • Mating bolt specification.

  • Nut height and width across flats.

  • Flange diameter and thickness.

  • Serration geometry.

  • Mating surface material and coating.

  • Iridescent zinc or alternative coating specification.

  • RoHS documentation requirements.

  • Corrosion resistance requirements.

  • Installation torque and functional requirements.

  • Quality and inspection criteria.

  • 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 Serrated Hex 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 Flange Nuts


Hexagon Flange Nuts

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