Steel Flat Head Partial Hex Body Blind Rivet Studs – Color Zinc

Product Specifications — Color Zinc Steel Flat Head Partial Hexagonal Body Blind Rivet Studs

JUXIN FASTENERS supplies color zinc finished steel flat head partial hexagonal body blind rivet studs for OEM sheet-metal assemblies requiring external male-thread mounting points and one-sided mechanical installation.

This configuration combines a flat head, a partially hexagonal rivet body and an externally threaded stud. The polygonal body section can engage a compatible mounting hole to resist rotation during assembly of the mating nut.

The color zinc finish distinguishes this product from the blue-white zinc version. For engineering and procurement teams, the distinction must be defined by the actual coating specification rather than visible color alone.

Correct product selection requires evaluation of the finished hexagonal body dimensions, mounting-hole geometry, grip range, installed stud projection, coating requirements and mechanical performance.

Technical Specification Summary

Product: Flat Head Partial Hexagonal Body Blind Rivet Stud

Base Material: Steel

Steel Grade: Subject to approved material specification

Thread Sizes: M5, M6, M8

Thread Configuration: External Male Metric Thread

Head Type: Flat Head

Body Type: Partial Hexagonal / Part-Hex Body

Surface Finish: Color Zinc

Coating Specification: Subject to confirmation

Grip Range: 0.5–5.5 mm across the product family

Installation: One-Sided Mechanical Blind Riveting

Hexagonal Body Dimensions: According to approved drawing

Mounting-Hole Geometry: According to approved drawing

Thread Pitch and Tolerance: According to approved drawing

Installed Stud Projection: According to approved drawing

Mechanical Performance: Subject to application-specific verification

The stated grip range applies to the product family. The permitted grip range of each individual M5, M6 or M8 part number must be confirmed.

1. Product Overview and Functional Design

A partial hexagonal blind rivet stud provides an externally threaded mounting point in a panel or hollow metal component where access to the rear surface is restricted.

The stud is inserted through a prepared mounting hole from the accessible side.

During installation, a compatible setting tool mechanically deforms the rivet body behind the parent material, creating a retaining feature.

The exposed male thread can then be used to assemble a bracket, support, equipment cover or other mating component using a suitable nut.

The partial hexagonal body introduces a geometric anti-rotation interface.

When the polygonal section engages a compatible mounting hole, it can resist rotation of the installed stud as the mating nut is tightened or removed.

The color zinc finish is intended to meet the specified surface treatment requirements for the steel fastener.

2. Color Zinc Finish — Appearance Is Not a Complete Specification

Color zinc is a commercial surface-finish description commonly associated with colored or iridescent zinc-coated steel hardware.

Related purchasing terms may include yellow zinc plated, color zinc plated and iridescent zinc finish.

These terms may overlap in commercial usage but should not automatically be treated as identical coating specifications.

A complete coating requirement should define the applicable:

• Zinc coating system

• Coating thickness

• Conversion coating

• Supplemental treatment

• Surface appearance

• Corrosion performance

• Restricted-substance requirements

• Dimensional requirements

• Inspection and documentation

Two fasteners with similar color zinc appearances may have different coating systems.

For OEM purchasing, color should be treated as one acceptance characteristic rather than the sole basis for technical approval.

3. Color Zinc vs. Blue-White Zinc — Engineering and Purchasing Differences

Color zinc and blue-white zinc are frequently used as commercial descriptions for finished steel fasteners.

The visible appearance may differ, but color alone does not establish coating thickness, chemistry or corrosion performance.

Color Zinc

Commercial Appearance: Colored or iridescent

Coating Chemistry: Must be specified

Coating Thickness: Must be specified

Corrosion Requirements: Must be defined

Restricted-Substance Compliance: Must be verified

Blue-White Zinc

Commercial Appearance: Blue-white or clear-blue

Coating Chemistry: Must be specified

Coating Thickness: Must be specified

Corrosion Requirements: Must be defined

Restricted-Substance Compliance: Must be verified

For an existing OEM assembly, changing from blue-white zinc to color zinc should be reviewed as a coating change.

The customer may need to evaluate dimensional compatibility, installation behavior, corrosion requirements, surface appearance and supporting documentation.

A coating substitution should not be approved solely because the underlying fastener geometry appears identical.

4. ISO 4042 and Electroplated Coating Systems

ISO 4042 provides an international technical framework for electroplated coating systems on steel fasteners.

Where zinc electroplating is specified, relevant requirements may include coating system designation, coating thickness, conversion coating, supplemental treatment, corrosion protection, dimensional compatibility and hydrogen embrittlement risk management.

The approved customer specification should identify which requirements apply.

Reference to ISO 4042 does not establish that this particular product has been tested or certified to a specified coating class.

The actual coating system must be confirmed before making product-specific compliance or performance claims.

5. Coating Thickness and Finished Hexagonal Dimensions

For a partial hexagonal blind rivet stud, coating thickness can affect the fit between the finished body and the mounting hole.

The hexagonal section provides a geometric interface that contributes to resistance against rotation.

The final across-flats dimension must therefore be considered in its finished condition.

Important factors include:

• Base-metal across-flats dimension

• Coating thickness

• Finished across-flats dimension

• Across-corners clearance

• Mounting-hole tolerance

• Surface condition

• Insertion clearance

• Installed engagement

An increase in finished body dimensions may reduce insertion clearance.

An excessive clearance between the finished body and mounting hole may affect the intended geometric engagement.

The dimensional effect depends on the actual coating system and geometry.

Where required, the approved drawing should identify whether dimensions apply before or after coating.

6. Engineering Information Gain — Why a Finish Change Can Affect Installation

Consider an M6 partial hexagonal blind rivet stud previously qualified with a blue-white zinc finish.

A customer requests the same nominal product with color zinc.

The material, external thread and basic geometry may remain unchanged, but several technical questions should be reviewed.

First, does the proposed coating system change the finished across-flats dimension?

Second, does the finished body still fit the existing polygonal mounting hole?

Third, does the coating affect the external thread tolerance or mating-nut engagement?

Fourth, does the surface condition influence insertion or setting consistency?

Fifth, does the new finish meet the customer's corrosion and regulatory requirements?

Sixth, does the change require drawing revision or customer approval?

A coating substitution may be acceptable after review, but equivalence should be demonstrated rather than assumed.

This is particularly important for existing production assemblies with established installation tooling and inspection requirements.

7. Partial Hexagonal Body and Anti-Rotation Mechanism

The partially hexagonal body incorporates a polygonal section intended to engage a compatible mounting hole.

This differs from a smooth cylindrical body, which lacks the same geometric anti-rotation interface.

It also differs from a knurled body, where raised surface features can contribute to engagement with the parent material.

The installed rotational resistance depends on:

• Hexagonal section geometry

• Mounting-hole dimensions

• Hole manufacturing tolerance

• Parent-material strength

• Panel thickness

• Rivet-body deformation

• Installation-tool settings

• Applied assembly torque

• Surface finish

The hexagonal section may contribute to resistance against stud rotation, but no universal spin-out torque is claimed.

Actual performance must be verified for the selected part and installation conditions.

8. Partial Hex vs. Full Hex vs. Smooth Round Body

Partial Hexagonal Body

A polygonal section is incorporated over part of the relevant body length.

Its geometry can provide engagement with a compatible mounting hole.

Full Hexagonal Body

A more extensive polygonal body configuration may be used according to the specific product design.

The installed behavior depends on the actual geometry and deformation characteristics.

Smooth Round Body

A cylindrical body is generally associated with a compatible round mounting hole.

Its rotational resistance depends on installed mechanical retention and contact conditions.

Selection should consider mounting-hole preparation, available tooling, parent-material properties, installation performance and total assembly cost.

No body configuration should automatically be described as superior without comparable application testing.

9. Hexagonal Mounting-Hole Requirements

The mounting hole is a critical part of the partial hexagonal rivet stud installation.

Where anti-rotation performance depends on polygonal engagement, the mounting hole must provide compatible geometry.

The approved drawing should define:

• Hole across-flats dimension

• Hole across-corners clearance

• Corner geometry

• Hole tolerance

• Hole position

• Panel thickness

• Edge distance

• Burr condition

• Surface coating condition

• Local material deformation limits

An oversized hole may reduce the intended engagement.

An undersized hole may prevent insertion or damage the fastener or parent material.

The actual mounting-hole specification must be verified for the selected part number.

10. Mounting-Hole Manufacturing and Production Consistency

Polygonal mounting holes may be produced through different fabrication methods, depending on the panel material and manufacturing process.

Potential methods include punching, laser cutting and machining.

Each method can produce different edge conditions.

Punching may introduce burrs, corner deformation or dimensional variation related to tooling condition.

Laser cutting may require attention to edge condition, corner geometry and dimensional accuracy.

Machining may be appropriate for certain production quantities or specialized components.

For OEM production, the mounting-hole process should be included in installation qualification.

A nominally correct across-flats dimension does not guarantee identical installation behavior when corner geometry and edge conditions differ.

11. Steel Material and Installation Formability

The confirmed base material is steel.

The exact steel grade, hardness and material condition have not been supplied.

A blind rivet stud must combine the required external threaded function with suitable deformation behavior in the rivet body.

Relevant considerations include:

• Steel grade

• Material condition

• Formability

• Thread requirements

• Rivet-body geometry

• Installation deformation

• Coating compatibility

• Parent-material properties

A change in steel grade may affect the setting process even when the nominal dimensions remain unchanged.

Material substitution should therefore be reviewed before approval.

12. Hydrogen Embrittlement Risk

Certain electroplating processes can introduce hydrogen into steel components.

For susceptible steel materials, hydrogen may contribute to delayed cracking under particular conditions.

The relevance of this risk depends on material strength, hardness, manufacturing history, coating process and applied stress.

Because the exact steel grade and hardness have not been confirmed, no product-specific hydrogen embrittlement classification is claimed.

Where applicable, the approved coating specification and qualification process should address relevant risk controls.

13. Corrosion Resistance and Surface Protection

Zinc coatings are commonly selected to provide corrosion protection to steel fasteners.

Actual performance depends on the complete coating system and service environment.

Relevant factors include:

• Zinc coating thickness

• Conversion coating

• Supplemental treatment

• Moisture exposure

• Salt exposure

• Mechanical damage

• Contact with dissimilar metals

• Storage and handling conditions

Where corrosion testing is specified, ISO 9227 or ASTM B117 may be referenced in the customer-approved validation plan.

The required exposure period and acceptance criteria must be defined separately.

No specific salt-spray performance, corrosion rating or outdoor service life is claimed for this product.

14. RoHS and Restricted-Substance Requirements

Color zinc appearance does not independently establish RoHS compliance.

Different colored conversion coating systems may use different chemical compositions.

Where RoHS compliance is required, the actual coating system should be verified using appropriate documentation.

Purchasing teams should distinguish among:

• Visual appearance

• Coating chemistry

• Restricted-substance compliance

• Corrosion performance

• Dimensional compatibility

• Customer-specific material restrictions

A supplier's finish color description is not sufficient evidence of regulatory compliance.

15. Grip Range — 0.5–5.5 mm

The supplied product-family grip range is 0.5–5.5 mm.

Approximate inch references:

0.5 mm = 0.020 in

5.5 mm = 0.217 in

Grip range describes the material thickness that the selected rivet body is designed to accommodate during installation.

It is not the external stud length or usable thread engagement.

Individual M5, M6 and M8 variants may have different permitted grip ranges.

The actual part-number specification must be verified before selection.

An incorrect grip range may cause incomplete deformation, poor head seating, reduced retention or excessive panel distortion.

16. Metric Thread Sizes and Inch References

The confirmed thread sizes are M5, M6 and M8.

M5: Approximately 0.197 in nominal diameter

M6: Approximately 0.236 in nominal diameter

M8: Approximately 0.315 in nominal diameter

These inch values are approximate dimensional conversions only.

They are not equivalent UNC, UNF or BSW thread sizes.

Metric and Unified inch threads are not directly interchangeable.

ISO 261 and ISO 965 provide relevant references for ISO metric thread combinations and tolerances where specified.

Actual thread pitch and tolerance must be confirmed from the approved drawing.

17. Flat Head Geometry and Installed Stud Projection

The flat head provides the accessible-side seating interface.

Important dimensions include:

• Head diameter

• Head thickness

• Body dimensions

• Hexagonal section dimensions

• External threaded length

• Installed stud projection

• Blind-side deformation clearance

A flat head does not automatically provide flush installation.

Where head projection affects the mating component, the installed geometry should be evaluated.

The loose-fastener overall length should not automatically be treated as the final usable threaded projection.

18. One-Sided Mechanical Installation

A typical installation process includes:

1. Prepare the mounting hole according to the approved drawing.

2. Inspect the polygonal hole geometry and edge condition.

3. Verify the parent-panel material and thickness.

4. Confirm the selected stud's grip range.

5. Engage the stud with compatible installation equipment.

6. Align the partial hexagonal section with the mounting hole.

7. Insert the rivet body from the accessible side.

8. Seat the flat head against the panel surface.

9. Apply the approved mechanical setting action.

10. Form the retaining feature behind the parent material.

11. Release the installation tool.

12. Inspect the installed stud before assembling the mating component.

Installation equipment must be compatible with the external male thread and rivet-body geometry.

Tool stroke, setting force and acceptance criteria must be established for the selected product.

19. Installed Mechanical Performance

The installed performance depends on the fastener, parent panel and installation process.

Axial Retention

The installed stud must resist the required extraction loads.

Rotational Resistance

The polygonal interface and installed body must resist unwanted rotation during mating-nut assembly.

Thread Integrity

The external thread must remain suitable for the required mating hardware.

Head Seating

The flat head should seat correctly against the parent material.

Panel Integrity

The parent panel must retain sufficient strength around the prepared mounting hole.

Assembly Torque Compatibility

The applied tightening torque must be compatible with the validated stud-to-panel connection.

No universal pull-out force, spin-out torque, tightening torque or fatigue rating is claimed.

These characteristics require product-specific testing or approved engineering documentation.

20. Anti-Rotation vs. Nut Loosening

The partial hexagonal body can contribute to resistance against rotation of the installed stud.

This function is different from preventing the mating nut from loosening.

Stud Anti-Rotation

Concerns whether the installed stud rotates within the parent material when torque is applied.

Nut Loosening Resistance

Concerns whether the mating nut maintains the required joint condition during service.

A partial hexagonal body does not automatically prevent the mating nut from loosening under vibration.

Where vibration resistance is required, the complete threaded joint should incorporate an appropriate locking strategy and application-specific validation.

21. Engineering Example — Color Zinc M6 Stud for a Fabricated Equipment Housing

Consider an OEM equipment housing requiring an M6 external threaded mounting point.

The rear side of the panel is inaccessible after fabrication.

The customer specifies a color zinc finish and requires the mounting bracket to be removable during maintenance.

A partial hexagonal blind rivet stud may be considered for this application.

Before approval, the engineering team should confirm:

1. Required M6 thread pitch and tolerance

2. Parent-panel material and thickness

3. Selected stud grip range

4. Partial hexagonal body dimensions

5. Mounting-hole across-flats dimension

6. Hole tolerance and corner geometry

7. Flat-head dimensions

8. Installed stud projection

9. Mating bracket thickness

10. Required nut engagement

11. Assembly torque

12. Installation-tool compatibility

13. Axial retention requirements

14. Rotational resistance requirements

15. Color zinc coating specification

16. Corrosion and regulatory documentation

The nominal M6 thread and color zinc appearance alone do not establish product suitability.

22. OEM Finish Substitution and Change Control

For established production programs, a change from blue-white zinc to color zinc may require formal review.

Potential change-control considerations include:

• Coating specification revision

• Finished body dimensions

• External thread compatibility

• Mounting-hole fit

• Installation behavior

• Corrosion requirements

• Restricted-substance documentation

• Visual acceptance criteria

• Customer approval requirements

• Traceability and revision control

A finish substitution should be evaluated according to the customer's engineering and quality requirements.

Where the coating change affects functional characteristics, additional installation trials or testing may be appropriate.

23. Industrial Applications

Automotive Equipment and Tier 1 Assemblies

Potential applications include selected non-safety-critical mounting brackets, fabricated panels and equipment housings.

Automotive use requires project-specific engineering and quality approval.

Industrial Machinery

Color zinc partial hexagonal blind rivet studs may be considered for machinery covers, mounting brackets, guards and serviceable equipment components.

Electrical Cabinets and Control Enclosures

Potential uses include internal mounting supports, accessory brackets and fabricated metal housings.

Electrical continuity, grounding and environmental sealing must be evaluated separately where relevant.

HVAC and Ventilation Equipment

Possible applications include equipment housings, sheet-metal brackets and fabricated support components.

Vibration and corrosion exposure should be considered.

Commercial Vehicle Equipment

The fasteners may be evaluated for selected non-critical accessory mounting points and fabricated equipment components.

Dynamic loading requires application-specific validation.

Fabricated Metal Products

Other potential applications include industrial cabinets, hollow metal profiles, modular sheet-metal assemblies and equipment frames.

The final selection should be based on the actual joint design and validated performance requirements.

24. OEM and Tier 1 Qualification Requirements

For production applications, partial hexagonal blind rivet studs should be evaluated in their installed condition.

Depending on customer requirements, qualification may include:

• Approved engineering drawing

• Steel material identification

• Dimensional inspection

• External thread inspection

• Partial hexagonal geometry verification

• Finished across-flats inspection

• Mounting-hole compatibility

• Grip-range verification

• Installation-tool compatibility

• Installed head seating

• Axial retention testing

• Rotational resistance testing

• Coating specification verification

• Corrosion testing where specified

• RoHS documentation where required

• Drawing revision control

• Lot identification and traceability

Automotive programs may require additional customer-specific quality documentation and production approval activities.

No automotive OEM approval, PPAP status or certified performance is implied without supporting records.

25. Procurement and Supplier Development — Color Zinc Partial Hex Rivet Stud Sourcing

OEM purchasing teams should evaluate both technical and commercial requirements when qualifying a color zinc partial hexagonal blind rivet stud supplier.

Product Configuration

Confirm flat head, partial hexagonal body and external male metric thread.

Material

Verify the required steel grade and material condition.

Body Geometry

Compare across-flats dimensions, hexagonal section length and transition geometry.

Mounting-Hole Compatibility

Confirm the required polygonal hole dimensions and manufacturing process.

Coating

Define the actual color zinc coating specification.

Regulatory Documentation

Confirm the required restricted-substance documentation.

Installation Compatibility

Review installation tooling and setting parameters.

Mechanical Performance

Determine the required axial retention and rotational resistance.

Quality Documentation

Define inspection, traceability and drawing revision requirements.

Commercial Supply

Confirm order quantities, estimated annual demand, delivery expectations and packaging instructions.

Engineering Change Control

Establish approval requirements for changes in material, geometry, coating or manufacturing specification.

A lower unit price may not represent a lower total assembly cost if the replacement requires new hole tooling, revised installation settings or additional qualification.

26. Drawing-Based OEM and Custom Requirements

Some applications require special body dimensions, stud projections or coating specifications.

Potential drawing-based requirements include:

• Customer-defined partial hexagonal dimensions

• Specific across-flats tolerances

• Modified hexagonal section length

• Special flat-head dimensions

• Application-specific grip requirements

• Defined steel grade

• Specified external stud projection

• Controlled thread tolerances

• Customer-approved color zinc coating system

• Inspection and documentation requirements

• Packaging and traceability instructions

Nonstandard configurations are subject to engineering review and manufacturing feasibility confirmation.

27. Frequently Asked Questions

What is a color zinc partial hexagonal blind rivet stud?

It is a steel fastener with an external male thread and a partially hexagonal body, supplied with a specified color zinc finish for one-sided mechanical installation.

Why use a partial hexagonal body?

The polygonal section can engage a compatible mounting hole and contribute to resistance against rotation of the installed stud.

Does the stud require a hexagonal mounting hole?

Where the design relies on polygonal engagement, the mounting hole must provide compatible geometry. The exact requirements must be confirmed from the approved drawing.

What thread sizes are available?

The confirmed sizes are M5, M6 and M8.

What is the grip range?

The supplied product-family range is 0.5–5.5 mm. Individual part-number ranges require confirmation.

Is color zinc the same as yellow zinc?

The terms may be used for similar commercial appearances, but they should not automatically be treated as identical coating specifications.

Can color zinc replace blue-white zinc?

Only after reviewing the coating specification, dimensional compatibility, installation conditions and customer approval requirements.

Does color zinc automatically meet RoHS requirements?

No. Compliance must be verified using appropriate documentation for the actual supplied coating system.

Does the partial hexagonal body prevent nut loosening?

No. It contributes to stud anti-rotation. Mating-nut loosening is a separate threaded-joint consideration.

Can these studs be installed in aluminum sheet?

They may be considered where the hole geometry, grip range and installed performance are compatible. Dissimilar-metal corrosion should also be evaluated.

28. Related Industrial Fastening Solutions

Engineers and purchasing teams evaluating color zinc partial hexagonal blind rivet studs may also consider related JUXIN FASTENERS product categories.

Blue-White Zinc Steel Partial Hexagonal Blind Rivet Studs — for an alternative specified surface finish.

Stainless Steel Partial Hexagonal Blind Rivet Studs — for applications requiring a different base material.

Smooth Round Body Blind Rivet Studs — for cylindrical body configurations.

Knurled Body Blind Rivet Studs — for alternative body engagement characteristics.

Thin Head Blind Rivet Studs — for reduced head projection requirements.

Countersunk Blind Rivet Studs — for recessed head installation requirements.

Blind Rivet Nuts — for applications requiring internal female threads.

Self-Clinching Studs — for suitable press-installed sheet-metal assemblies.

Weld Studs — for applications designed around an approved welding process.

Custom Industrial Fasteners — for drawing-based fastening requirements.

Each fastening method should be evaluated according to the parent material, installation process, assembly geometry and required mechanical performance.

29. OEM RFQ Requirements

For accurate quotation and engineering review, please provide the following information where available:

1. Required thread size: M5, M6 or M8

2. Engineering drawing or CAD file

3. External thread pitch and tolerance

4. Required steel grade

5. Flat-head dimensions

6. Partial hexagonal across-flats dimension

7. Hexagonal section length

8. Body transition geometry

9. External stud projection

10. Parent-panel material

11. Panel thickness and required grip range

12. Mounting-hole geometry and tolerance

13. Installation equipment and setting requirements

14. Color zinc coating specification

15. RoHS or corrosion documentation requirements

16. Installed axial and rotational performance requirements

17. Inspection and traceability requirements

18. Initial order quantity

19. Estimated annual purchasing volume

20. Packaging and delivery requirements

Providing the approved drawing and actual installation conditions helps establish product compatibility and accurate quotation requirements.

30. JUXIN FASTENERS — Color Zinc Partial Hex Blind Rivet Stud OEM Supply

JUXIN FASTENERS supplies industrial fastening products for international OEM engineering, procurement and supplier development requirements.

Our steel flat head partial hexagonal body blind rivet studs with color zinc finish are intended for sheet-metal applications requiring external threaded mounting points, one-sided installation and a polygonal body interface designed to resist rotation.

For M5, M6 and M8 requirements, customers may submit drawings, material specifications, coating requirements, mounting-hole details, installation conditions and purchasing quantities for technical review.

Request an OEM Technical Quotation

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

Please include your product drawing, required quantity, steel specification, color zinc finish requirements, panel thickness and mounting-hole dimensions.

JUXIN FASTENERS — Industrial Fastening Solutions for OEM Engineering and Global Procurement.

Product Packaging — Color Zinc Steel Partial Hex Blind Rivet Studs

Packaging for M5, M6 and M8 color zinc steel flat head partial hexagonal body blind rivet studs can be reviewed according to confirmed order specifications and OEM supply-chain requirements.

Inner Packaging: Protective inner packaging may be specified to help reduce thread damage, coating contact and contamination during handling.

Outer Cartons: Suitable export cartons may be arranged according to product quantity, shipment weight and agreed packaging requirements.

Pallet Packaging: Palletized arrangements may be considered for bulk industrial shipments, subject to confirmed shipping specifications.

Thread and Coating Protection: Packaging should consider protection of external male threads, partial hexagonal body geometry, flat-head seating surfaces and color zinc finishes during storage and transportation.

Product Identification: Customer-specified labels may include thread size, material, surface finish, part number, quantity and drawing revision.

Lot Traceability: Batch identification and traceability requirements should be established in the approved purchasing and quality documentation.

OEM Custom Packaging: Customer-specific packing quantities, labeling, component segregation and automotive supply-chain packaging instructions are subject to review and confirmation.

Final packing quantities, carton arrangements and shipment details will be confirmed against the approved order.

For OEM packaging specifications and quotation inquiries:

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com