Thin Head Half-Hex Blind Rivet Nuts – Open End

Thin Head Half-Hex Blind Rivet Nut Specifications

Standard Product Range

M8 Reference Dimensions

The flange geometry and all installation-hole dimensions must be confirmed against the approved technical drawing.

M8 Thin Head Half-Hex Rivet Nut: Detailed Engineering Dimensions

For engineers evaluating M8 fastening points in thin sheet metal assemblies, the following dimensions are provided for the documented M8 configuration.

Important dimensional clarification: The supplied 11.5 mm flange dimension is identified as “A/F,” normally meaning across flats, 

while the product is also described as having a flange diameter. These terms are not interchangeable. The approved drawing must confirm the actual flange geometry before machining or tooling release.

Why the M8 Mounting Hole Dimension Matters

A half-hex rivet nut is not intended to rely entirely on friction against the mounting hole.

The partial-hexagonal body must engage with the correctly formed hole profile.

For the documented M8 configuration, the nominal installation-hole dimension is 10.6 mm across flats, with a positive tolerance of 0.1 mm and no negative tolerance.

This means the specified across-flats dimension is 10.6–10.7 mm.

However, across-flats measurement alone does not fully define the required hole geometry. Corner dimensions, round-section clearance and hole orientation must also follow the approved drawing.

Excessive hole clearance may reduce resistance to rotation.

An undersized hole may prevent proper insertion or damage the rivet nut body during installation.

Why the M8 Grip Range Is 0.9–3.3 mm

The overall product family is described as covering 0.5–3.5 mm, but the supplied M8 configuration has a more specific grip range of 0.9–3.3 mm.

This distinction is important for OEM engineering.

A panel thickness that falls within the general product-family range may still be unsuitable for a particular insert size or barrel length.

For example, a 0.7 mm panel would fall below the stated minimum grip thickness for this M8 configuration.

Selecting the insert based only on the overall family range could therefore lead to an incorrect specification.

The actual panel thickness, material properties and installation conditions must be checked before final selection.

Understanding the 0.5 mm Flange Thickness

The documented M8 thin-head rivet nut has a flange thickness of 0.5 mm.

This provides a lower-profile mounting surface than many conventional flanged designs.

Nevertheless, a thin flange may provide less bearing area or different resistance to push-through forces than a larger or thicker flange.

Engineers should evaluate the required clamping force, panel material and flange support before replacing an existing flat-head rivet nut with a thin-head version.

Understanding the 15.5 mm Under-Head Length

The documented body length is measured from beneath the flange.

This dimension is useful when evaluating the available installation envelope.

However, the undeformed body length should not be confused with the installed protrusion behind the panel.

The final installed geometry depends on the setting process, grip thickness and insert design.

For assemblies containing electronic components, wiring or adjacent structural features, installed clearance should be verified using representative samples.

Thin Head Half-Hex Versus Standard Flat-Head Rivet Nuts

Selecting between thin-head and conventional flat-head rivet nuts requires more than comparing appearance.

Neither configuration should be considered universally stronger.

The appropriate choice depends on panel thickness, insert dimensions, installation conditions and mechanical performance requirements.

Industrial Applications

Communication Cabinets and Telecommunications Equipment

Communication cabinets often contain removable panels, electronic modules, support brackets and internal mounting structures.

Thin-head half-hex rivet nuts may be used where limited surface clearance and repeated screw removal are important.

Typical applications include:

• Communication equipment housings

• Network cabinet panels

• Internal electronic module brackets

• Cable management supports

• Service access covers

• Sheet metal equipment frames

Electrical Cabinets and Industrial Control Panels

Electrical enclosure manufacturers frequently require threaded fastening points in relatively thin metal panels.

Thin-head half-hex blind rivet nuts can provide removable fastening connections for internal mounting brackets, cover panels and mechanical accessories.

Electrical bonding or grounding performance must be evaluated separately. The presence of a metallic rivet nut does not automatically establish a qualified protective bonding path.

Data Center Equipment Enclosures

Potential applications include sheet metal components used in server cabinets, telecommunications racks, equipment housings and associated mounting accessories.

The reduced head may be useful where adjacent panels or components have limited clearance.

Actual suitability depends on mechanical loading and equipment-specific requirements.

Industrial Automation and Machinery

Automation equipment often includes removable protective covers, instrument brackets and sheet metal housings.

Half-hex rivet nuts provide threaded fastening points where conventional backing nuts would be difficult to access.

Electronics and Instrument Enclosures

Thin-head inserts may be considered for metal instrument housings, equipment covers and internal mechanical supports.

Designers should check screw protrusion, electrical clearances and installed insert dimensions.

HVAC and Mechanical Equipment

Potential uses include service panels, equipment covers, mounting brackets and fabricated metal housings.

Corrosion exposure, vibration and service conditions must be evaluated during product selection.

Engineering Selection: Six Factors That Determine Installation Reliability

1. Correct Mounting Hole Geometry

The mounting hole must match the partial-hex body profile.

A conventional round hole should not be assumed suitable.

The approved drawing must define all critical dimensions and tolerances.

2. Panel Thickness and Grip Range

Choose the specific insert configuration according to the actual panel thickness.

For the documented M8 version, the specified grip range is 0.9–3.3 mm.

3. Panel Material and Hardness

Steel, stainless steel and aluminum panels may respond differently during rivet nut installation.

Panel hardness, ductility and thickness affect the deformation and retention behavior of the installed insert.

4. Installation Stroke and Force

Incorrect setting parameters can result in insufficient deformation, damaged threads or panel distortion.

Setting parameters should be established through installation trials.

5. Screw Tightening Torque

The mating screw torque must be compatible with the installed insert and the complete joint.

A higher-strength screw does not automatically increase the load capacity of the rivet nut installation.

6. Environmental Conditions

Blue zinc plating provides corrosion protection through a zinc-based coating system.

Coating thickness, passivation and service exposure influence actual performance.

Outdoor or aggressive environments may require alternative protection systems.

How to Install Thin Head Half-Hex Blind Rivet Nuts

1. Verify the selected thread size and grip range.

2. Prepare the specified partial-hex mounting hole.

3. Inspect hole dimensions, burrs and panel condition.

4. Install the correct mandrel on the setting tool.

5. Engage the rivet nut with the tool mandrel.

6. Insert the rivet nut into the mounting hole.

7. Keep the setting tool perpendicular to the panel.

8. Apply the validated installation stroke or force.

9. Release the setting mandrel.

10. Inspect flange seating, thread integrity and mechanical retention.

For production applications, representative installation trials are recommended before finalizing process settings.

Mechanical Qualification for OEM Applications

JUXIN FASTENERS recommends evaluating the installed fastening system according to the actual application requirements.

Important performance characteristics include:

Spin-Out Torque: Resistance to rotation within the mounting hole.

Axial Pull-Out Resistance: Resistance to extraction from the parent material.

Push-Out Resistance: Resistance to displacement through the mounting hole.

Thread Integrity: Ability of the internal thread to function after setting.

Installation Repeatability: Consistency of deformation and retention across production samples.

Corrosion Resistance: Suitability of the specified coating system for the intended service environment.

Test methods and acceptance criteria should be defined by the customer or agreed during engineering review.

Materials, Threads and Surface Treatment

Steel Construction

The documented product is manufactured from steel.

Mechanical properties depend on the actual material specification and manufacturing process.

Blue Zinc Surface Finish

The supplied M8 example specifies a Cr(III) clear passivation system.

Trivalent chromium passivation is commonly used with zinc electroplating where hexavalent chromium restrictions must be addressed.

RoHS compliance should be supported by applicable material and coating documentation.

International Thread References

Relevant international metric thread standards include:

• ISO 261 — General-purpose metric screw thread plan

• ISO 724 — Basic metric thread dimensions

• ISO 965 — Metric thread tolerances

For zinc electroplating, ISO 2081 and ASTM B633 may be relevant where specifically required by the customer.

These standards are references for engineering specification and do not imply automatic certification of the product.

Custom Thin Head Half-Hex Rivet Nuts for OEM Manufacturing

JUXIN FASTENERS can review drawing-defined blind rivet nut requirements for industrial applications.

Customization requests may include:

• Special thread sizes

• Modified flange dimensions

• Alternative body lengths

• Custom partial-hex geometry

• Special grip ranges

• Drawing-defined tolerances

• Alternative zinc coating specifications

• Customer-specific inspection requirements

• Packaging and identification requirements

Manufacturing feasibility, minimum order quantities, tooling requirements and delivery schedules depend on the final specification.

OEM Procurement and RFQ Checklist

To obtain an accurate quotation, purchasing and engineering teams should provide:

• Product drawing or reference part number

• Thread size and tolerance

• Material specification

• Surface finish requirements

• Mounting hole geometry

• Panel thickness and material

• Required mechanical performance

• Estimated annual usage

• Order quantities

• Packaging requirements

• Delivery destination

For an M8 application, please indicate whether the documented 10.6 mm across-flats mounting hole, 0.9–3.3 mm grip range and 0.5 mm flange thickness match your design.

This information helps reduce specification uncertainty and supports a more efficient technical review.

Request a Quotation from JUXIN FASTENERS

JUXIN FASTENERS provides industrial fastening and custom component solutions for OEM manufacturers, equipment designers and global procurement teams.

For thin-head half-hex blind rivet nuts, custom nutserts or drawing-based threaded insert requirements, please send your technical specifications and expected order quantities.

JUXIN FASTENERS

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

Contact: https://www.juxinfasteners.com/contact-us/

Packaging and OEM Supply

Thin head half-hex blind rivet nuts are supplied with plastic inner-bag packaging and outer cartons. Palletized packaging can be arranged according to shipment requirements.

Reference Packaging Dimensions

Actual packing quantities and carton selection depend on product size and order requirements.

Custom packaging, part-number identification, batch labeling and customer-specific shipment arrangements can be reviewed for OEM purchasing programs.

JUXIN FASTENERS

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com