Steel Flat Head Partial Hex Body Blind Rivet Studs – Blue-White Zinc

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

JUXIN FASTENERS supplies steel flat head partial hexagonal body blind rivet studs for OEM sheet-metal assemblies requiring externally threaded mounting points, one-sided mechanical installation and a body configuration designed to resist rotation.

These steel blind rivet studs feature a flat head, a partially hexagonal rivet body and an external male metric thread. The blue-white zinc surface finish distinguishes this version from natural-finish stainless steel partial hexagonal studs.

The partial hexagonal section can engage a compatible polygonal mounting hole, providing a mechanical anti-rotation interface. During installation, the deformable rivet body forms a retaining feature behind the parent material.

For OEM engineers and purchasing teams, correct selection depends on more than the nominal M5, M6 or M8 thread. Mounting-hole geometry, grip compatibility, finished dimensions, coating requirements and installed mechanical performance must also be evaluated.

Technical Specification Summary

Product Type: 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 Configuration: Partial Hexagonal / Part-Hex Body

Surface Finish: Blue-White Zinc

RoHS Compliance: Subject to verification for the supplied coating system

Grip Range: 0.5–5.5 mm across the product family

Installation Method: 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 and installation conditions

Coating Thickness: Subject to approved finish specification

Custom Requirements: Subject to engineering review and manufacturing feasibility confirmation

The stated grip range applies to the product family. Each individual part number must be checked for its permitted installation thickness.

1. What Is a Steel Partial Hexagonal Blind Rivet Stud?

A steel partial hexagonal blind rivet stud creates an external threaded attachment point in a panel or hollow metal component where access to the rear surface is unavailable or restricted.

Unlike a conventional bolt-and-nut connection, the stud is installed from one accessible side.

A compatible setting tool mechanically deforms the rivet body behind the parent material, retaining the fastener within the prepared mounting hole.

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

The partial hexagonal body provides an additional design feature.

When its polygonal section engages the corresponding mounting-hole geometry, the interface can help resist rotation of the installed stud during assembly.

This product is particularly relevant to fabricated metal assemblies where external threaded mounting points must remain in place during subsequent manufacturing or maintenance operations.

2. Partial Hexagonal Body Design and Anti-Rotation Function

The distinguishing feature of this product is its partially hexagonal body.

The polygonal section provides flats that can engage a compatible mounting hole.

When a mating nut is tightened onto the external thread, torque may be transmitted through the installed stud.

The polygonal interface can resist this torque through geometric engagement with the parent material.

This differs from smooth round body designs, which do not provide the same hexagonal engagement geometry.

It also differs from knurled body designs, where raised surface features can contribute to resistance against rotation.

The actual rotational resistance depends on:

• Hexagonal section dimensions

• Mounting-hole geometry

• Hole manufacturing tolerance

• Parent-material strength

• Parent-material thickness

• Installation deformation

• Setting-tool parameters

• Applied assembly torque

• Finished surface condition

A partial hexagonal body should not be assigned a universal spin-out torque rating without product-specific testing.

3. Partial Hex vs. Full Hex Body

Partial hexagonal and full hexagonal body fasteners are related but distinct configurations.

A partial hexagonal body incorporates a polygonal section over part of the relevant body length.

A full hexagonal body incorporates a more extensive polygonal exterior according to its specific design.

The exact geometry affects insertion, engagement with the mounting hole and deformation during setting.

Engineers should compare:

• Across-flats dimensions

• Across-corners dimensions

• Hexagonal section length

• Round-to-hex transition geometry

• Deformable body length

• Grip compatibility

• Installation-tool requirements

• Installed axial retention

• Installed rotational resistance

Neither configuration should automatically be described as mechanically superior without comparable test conditions.

The appropriate design depends on the parent material, mounting-hole geometry and required assembly performance.

4. Hexagonal Mounting-Hole Requirements

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

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

A conventional circular drilled hole should not automatically be considered equivalent to a correctly prepared polygonal hole.

The approved drawing should define the necessary dimensions and tolerances.

Important factors include:

• Hole across-flats dimension

• Hole across-corners clearance

• Corner geometry

• Hole position

• Hole tolerance

• Burr condition

• Parent-panel thickness

• Edge distance

• Local material deformation

• Surface coating condition

An oversized polygonal hole may reduce the intended engagement.

An undersized hole may prevent proper insertion or damage the stud body.

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

5. Engineering Information Gain — Coating Thickness and Hexagonal Hole Fit

A zinc coating can influence more than corrosion protection.

For a partial hexagonal blind rivet stud, the finished dimensions of the polygonal section are important because they interact directly with the prepared mounting hole.

Consider an existing M6 partial hexagonal stud that has been qualified with one zinc coating specification.

If the coating system is changed, the engineering team should evaluate the finished across-flats dimension rather than comparing only the uncoated body geometry.

Potential effects include:

Finished Across-Flats Dimension

Coating thickness may change the final dimension measured across the hexagonal flats.

Insertion Clearance

A dimensional change may affect the clearance between the stud and mounting hole.

Corner Clearance

The coating and manufacturing process may influence the fit at polygonal corners.

Installation Consistency

Changes in surface condition may affect insertion and setting behavior.

Thread Fit

The external metric thread must remain compatible with the required tolerance after coating.

Rotational Resistance

Changes in the finished geometry or contact conditions may influence installed rotational performance.

For production qualification, the relevant dimensions should be inspected in the finished condition when required by the approved specification.

This is particularly important when evaluating alternative suppliers or coating substitutions.

6. Blue-White Zinc Surface Finish

The supplied surface treatment is described as RoHS blue-white zinc.

Blue-white zinc is a commercial appearance designation commonly used for zinc-finished steel hardware.

However, the visible color does not fully define the coating system.

An OEM coating specification should identify the relevant requirements, including:

• Coating type

• Coating thickness

• Conversion coating

• Supplemental treatment where applicable

• Surface appearance

• Corrosion performance

• Thread dimensional compatibility

• Restricted-substance requirements

• Inspection and documentation

Blue-white zinc should not automatically be treated as interchangeable with yellow zinc, color zinc or another specified coating system.

Where a coating change is proposed, the engineering team should determine whether additional approval or validation is required.

7. ISO 4042 and Electroplated Steel Fasteners

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

Where applicable to the approved coating specification, relevant considerations include:

• Coating system designation

• Coating thickness

• Conversion coating

• Supplemental treatments

• Corrosion protection

• Thread dimensional compatibility

• Process controls

• Hydrogen embrittlement risk management

ISO 4042 can be referenced when defining customer requirements for zinc-electroplated fasteners.

The mention of this standard does not establish that the supplied product has been tested or certified to a particular coating designation.

The actual coating requirements must be confirmed against the approved purchase specification.

8. RoHS Compliance and Coating Documentation

A blue-white zinc appearance does not independently establish RoHS compliance.

Where the customer requires compliance with applicable restricted-substance requirements, appropriate supporting documentation should be reviewed for the actual supplied coating system.

Procurement and supplier quality teams should distinguish among:

• Surface appearance

• Coating chemistry

• Coating thickness

• Corrosion performance

• Regulatory compliance

• Customer-specific restrictions

These requirements should be documented separately when necessary.

The term RoHS blue-white zinc is not sufficient evidence of compliance without supporting records.

9. Corrosion Resistance and Environmental Selection

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

However, the actual performance depends on the coating system and service environment.

Important factors include:

• Zinc coating thickness

• Conversion coating

• Supplemental sealer or topcoat

• Moisture exposure

• Salt exposure

• Contact with dissimilar metals

• Mechanical damage during installation

• Storage and handling conditions

Where corrosion testing is specified, ISO 9227 or ASTM B117 may provide relevant salt-spray testing methods.

The required test duration and acceptance criteria must be defined by the customer.

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

A laboratory salt-spray result should not be treated as a direct prediction of service life in every operating environment.

10. Steel Material Selection and Formability

The confirmed base material is steel.

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

For a blind rivet stud, material selection must account for both the external threaded portion and the deformable rivet body.

Relevant considerations include:

• Steel grade

• Material condition

• Formability

• Thread requirements

• Rivet-body deformation

• Installed mechanical retention

• Coating compatibility

• Operating environment

A material that is suitable for conventional threaded hardware is not automatically suitable for every mechanically deformable blind rivet stud design.

The material must be compatible with the intended manufacturing and installation processes.

11. Hydrogen Embrittlement Risk in Electroplated Steel Fasteners

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:

• Steel strength

• Material hardness

• Manufacturing history

• Coating process

• Applied stress

• Component geometry

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 supplier qualification plan should address relevant risk controls.

12. Grip Range — 0.5–5.5 mm

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

Approximate inch equivalents:

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 equivalent to external stud length or usable thread engagement.

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

The correct part number should be selected according to the actual panel thickness.

An incorrect grip selection can result in incomplete body deformation, poor head seating, insufficient axial retention or inconsistent installation quality.

13. 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 dimensional references 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 verified against the approved drawing.

14. Flat Head Geometry and External Stud Projection

The flat head provides the accessible-side seating interface.

Its dimensions affect contact area, installed head projection and clearance for adjacent components.

Important dimensions include:

• Head diameter

• Head thickness

• Body diameter

• Hexagonal section dimensions

• External threaded length

• Installed stud projection

• Blind-side deformation clearance

A flat head does not automatically provide a flush installation.

Where head projection is critical, engineers should evaluate the complete assembly geometry.

The installed stud projection should be confirmed separately from the loose-fastener overall length.

15. 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 mating-component assembly.

The 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.

16. Installed Mechanical Performance

The installed performance of a partial hexagonal blind rivet stud depends on the complete assembly.

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 values require product-specific testing or approved engineering documentation.

17. Anti-Rotation vs. Nut Loosening

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

This should not be confused with resistance to loosening of the mating nut.

The two functions are different.

Stud Anti-Rotation

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

Nut Loosening Resistance

Concerns whether the assembled nut loses the required joint condition during service.

A partial hexagonal stud 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.

18. Engineering Example — M6 Steel Partial Hex Stud in a Fabricated Enclosure

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

The rear side of the panel is inaccessible after assembly.

The design requires a removable mounting bracket, and the customer specifies a blue-white zinc finish.

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

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. Installed axial retention

14. Installed rotational resistance

15. Blue-white zinc coating specification

16. Corrosion and regulatory documentation

The nominal thread size, body appearance and coating color alone do not establish product compatibility.

19. Information Gain — Why a Lower-Cost Steel Substitution May Require Requalification

A purchasing team may consider replacing a stainless steel partial hexagonal rivet stud with a zinc-finished steel version.

Both products may have the same nominal thread size and similar external geometry.

However, the substitution requires engineering review.

Material Behavior

Steel and stainless steel grades may have different mechanical properties and deformation behavior.

Corrosion Protection

A zinc-finished steel fastener relies on the specified coating system for part of its corrosion protection.

A stainless steel fastener has different material-dependent corrosion characteristics.

Finished Dimensions

Coating thickness may influence the final body and thread dimensions.

Installation Settings

Different material properties may require different installation conditions.

Mechanical Performance

Installed axial retention and rotational resistance may differ.

Environmental Compatibility

The operating environment may affect the suitability of each material and finish.

Lifecycle Cost

Initial unit price should be considered together with qualification, installation, corrosion protection and maintenance requirements.

The correct substitution decision should be based on the approved engineering requirements rather than material price alone.

20. 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

Steel 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.

21. 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.

22. Procurement and Supplier Development — Steel Partial Hex Rivet Stud Sourcing

OEM procurement teams should evaluate both technical and commercial requirements when qualifying a 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 blue-white 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 replacement that requires new hole tooling, revised installation settings or additional qualification may introduce costs beyond the quoted fastener price.

23. 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 zinc coating system

• Inspection and documentation requirements

• Packaging and traceability instructions

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

24. Frequently Asked Questions

What is a steel partial hexagonal blind rivet stud?

It is a mechanically installed steel fastener with an external male thread and a partially hexagonal body, intended for one-sided installation in a compatible parent material.

Why use a partial hexagonal body?

The polygonal section can engage a corresponding 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.

What is blue-white zinc?

It is a commercial surface-finish description. The actual coating system must be defined by the approved specification.

Does blue-white zinc automatically meet RoHS requirements?

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

Can this product replace a stainless steel partial hex stud?

Not automatically. Material properties, corrosion requirements, coating dimensions, installation conditions and mechanical performance must be reviewed.

Does the partial hex 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.

25. Related Industrial Fastening Solutions

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

Stainless Steel Partial Hexagonal Blind Rivet Studs — for applications requiring a different material and surface-finish system.

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.

26. 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. Blue-white 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.

27. JUXIN FASTENERS — Steel 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 blue-white 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, blue-white zinc finish requirements, panel thickness and mounting-hole dimensions.

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

Product Packaging — Steel Partial Hex Blind Rivet Studs

Packaging for M5, M6 and M8 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 blue-white 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