Flat Head Closed-End Smooth Body Steel Blind Rivet Nuts

Technical Specifications — Closed-End Steel Blind Rivet Nuts

Product Identification

Metric Thread Reference

The following values represent standard ISO metric coarse thread pitches.

 Final thread specifications and tolerances must be confirmed against the product drawing.

Applicable metric thread references may include ISO 261, ISO 724, and ISO 965, subject to the selected drawing requirements.

Engineering Design and Installation Guide

1. Closed-End Versus Open-End Rivet Nuts

Closed-end rivet nuts incorporate an enclosed barrel end, while open-end rivet nuts have a through-opening.

The closed-end design can help prevent direct entry of contaminants through the threaded barrel end.

However, it does not automatically prevent leakage between the rivet nut flange and the mounting panel.

For watertight or airtight applications, additional sealing measures and complete assembly validation may be required.

2. Screw Length and Internal Bottoming

Unlike open-end threaded inserts, closed-end rivet nuts have a finite internal cavity.

If the mating screw is too long, it may bottom against the closed end before the joint is properly clamped.

This can cause misleading tightening torque readings, incomplete joint clamping, internal thread damage, or deformation of the closed barrel.

Before specifying screw length, engineers should confirm:

• Available internal thread depth

• Minimum required thread engagement

• Total clamped material thickness

• Screw length and tolerance

• Allowance for washers or other assembly components

• Closed-end clearance after installation

3. Mounting Hole Compatibility

The smooth round body requires an appropriately sized mounting hole.

Excessive clearance can reduce rotational retention, while an undersized hole may prevent proper installation or damage the surface finish.

Mounting hole dimensions and tolerances must be taken from the approved product drawing.

4. Grip Range and Panel Thickness

The published 0.5–5.5 mm grip range represents the product series and does not apply automatically to every size.

The selected configuration must be compatible with the actual panel thickness and material.

Panel hardness, coatings, and local deformation behavior may affect installation performance.

5. Installation Procedure

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

2. Remove burrs and inspect the panel surface.

3. Select the correct rivet nut setting mandrel.

4. Insert the rivet nut and seat the flange against the panel.

5. Hold the setting tool approximately perpendicular to the mounting surface.

6. Apply the specified setting stroke or force.

7. Inspect the formed backside retention section.

8. Check flange seating and internal thread integrity.

9. Perform retention testing when required by the application.

6. Spin-Out Torque and Pull-Out Resistance

Smooth-body rivet nuts rely on the installed deformation and interaction with the mounting panel for retention.

For applications involving repeated screw removal, vibration, or elevated tightening torque, 

spin-out resistance and axial pull-out performance should be evaluated.

Knurled-body or hex-body alternatives may be considered where additional anti-rotation engagement is required.

7. Sealing and Environmental Protection

The closed barrel blocks direct passage through the insert end, but complete sealing depends on the full assembly.

Potential leakage paths include:

• Flange-to-panel interface

• Damaged or deformed mounting holes

• Incomplete flange seating

• Cracks or damage in the closed barrel

• Other openings in the enclosure assembly

For applications requiring defined ingress protection, testing may be specified according to IEC 60529 where applicable.

An IP rating must not be claimed for the individual rivet nut without supporting evidence.

8. Blue Zinc Coating and Corrosion Requirements

The existing product specification identifies blue zinc plating.

Coating thickness, passivation chemistry, corrosion performance,

 and restricted-substance conformity must be established by the applicable purchase specification.

ASTM B633 or ISO 2081 may be referenced where appropriate for electroplated zinc coating requirements.

The coating appearance alone does not establish corrosion resistance or RoHS conformity.

9. Engineering Validation Checklist

Before approving an OEM application, evaluate:

• Mounting hole fit

• Individual grip range

• Backside deformation

• Flange seating

• Screw engagement and bottoming clearance

• Spin-out resistance

• Pull-out resistance

• Thread condition after setting

• Corrosion requirements

• Joint sealing performance, where applicable

Technical Drawings and CAD

The existing JUXIN FASTENERS product information references specification PDF pages 89–90 and CAD documentation.

The applicable drawing should be reviewed to confirm individual part dimensions, mounting hole tolerances, grip range, and available internal thread depth.

OEM Technical RFQ Requirements

Please provide:

• Required metric thread size

• Panel material and thickness

• Mounting hole diameter and tolerance

• Required grip range

• Flange dimensions

• Mating screw length

• Available backside clearance

• Surface treatment and corrosion requirements

• Mechanical retention requirements

• Environmental sealing requirements, if applicable

• Technical drawing or CAD model

• Estimated order quantity and annual demand forecast

JUXIN FASTENERS can review drawing-based requirements and confirm the applicable product configuration during quotation.

Typical Industrial Applications

These closed-end blind rivet nuts may be used in electrical enclosures, control cabinets, HVAC equipment housings, machinery covers, 

fabricated steel brackets, vehicle body components, and industrial equipment panels.

They are particularly relevant where engineers need a blind threaded attachment point while avoiding an open passage through the end of the insert.

Engineering Selection

Engineers must verify grip range, mounting hole dimensions, installation stroke, flange seating, thread engagement, and available backside clearance.

Because the barrel is closed, screw length must be controlled to prevent bottoming against the internal end of the insert.

For applications involving water, dust, pressure, or other environmental exposure, the complete installed joint must be evaluated rather than relying on the closed-end configuration alone.

JUXIN FASTENERS supports drawing-based OEM sourcing and industrial purchasing requirements for closed-end steel blind rivet nuts.

Packaging & OEM Ordering — Closed-End Steel Blind Rivet Nuts

Standard Export Packaging

JUXIN FASTENERS provides export packaging for closed-end steel blind rivet nuts to support international transportation, handling, and industrial warehousing.

Standard packaging arrangements may include:

• Protective polyethylene inner bags or small boxes

• Reinforced export cartons

• Moisture-resistant inner protection

• Product identification labels

• Part number, specification, batch number, and quantity identification

• Palletized shipment when required

Packaging quantities and carton dimensions are confirmed according to the selected product size and order requirements.

Customized OEM Packaging

Customer-specific packaging requirements can be reviewed, including:

• Private-label packaging

• Customized barcode labels

• Customer part-number identification

• Specific packing quantities

• Carton marking and traceability requirements

• Special pallet configurations

Customized packaging may involve additional costs or lead times depending on the agreed requirements.

OEM Purchasing Requirements

For OEM manufacturers, purchasing managers, supplier development teams, and strategic sourcing professionals, please provide:

• Product thread size and configuration

• Material and surface treatment requirements

• Approved drawing and revision

• Grip range and installation conditions

• Inspection and testing requirements

• Packaging and labeling specifications

• Estimated order quantity and annual demand

• Requested delivery schedule

Sample availability, pricing, production lead time, and ordering conditions are confirmed during quotation review.

Request an OEM Quotation

JUXIN FASTENERS

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

Please send your drawings, technical specifications, and purchasing requirements for review and quotation.