Flat Head Open-End Knurled Steel Blind Rivet Nuts

Technical Specifications — Blue Zinc Knurled Steel Blind Rivet Nuts

Product Identification

Metric Thread Sizes and US Inch Reference

These values represent standard ISO metric coarse thread dimensions and approximate inch conversions.

ISO metric threads are not interchangeable with UNC or UNF threads.

Applicable references may include ISO 261, ISO 724, and ISO 965, subject to the approved drawing.

Imperial Thread Requirements — US OEM Applications

The product information identifies inch and metric rivet nut requirements, but individual Unified inch sizes are not confirmed for this specific blue zinc configuration.

For US OEM projects, the following commonly specified Unified thread designations may be reviewed as custom requirements.

These are engineering inquiry references, not confirmed stock sizes or guaranteed manufacturing configurations.

Unified inch threads should be defined according to applicable ASME B1.1 requirements.

Grip Range — Metric and Imperial Reference

The published product-series grip range is 0.5–6.5 mm (approximately 0.020–0.256 in).

These values are unit conversion references only.

The actual grip range for each thread size and body length must be verified against the approved technical drawing.

Engineering Selection and Installation Guide

1. Knurled Body and Rotational Retention

Knurled rivet nuts incorporate surface features designed to engage the surrounding mounting material.

During installation, these features may create additional resistance to rotation.

Performance depends on:

• Knurl profile and depth

• Panel material hardness

• Mounting hole diameter

• Hole tolerance

• Installation deformation

• Grip range

• Coating condition

• Applied tightening torque

Knurling should not be treated as a guarantee against spin-out.

2. Mounting Hole Tolerance and Knurl Engagement

The mounting hole must be compatible with the selected knurled body.

An oversized hole may reduce knurl engagement and rotational retention.

An undersized hole may damage the coating, interfere with installation, or cause excessive panel deformation.

For OEM validation, inspect:

• Hole diameter

• Hole roundness

• Burr condition

• Panel thickness

• Knurl outer diameter

• Installed body deformation

Use the approved drawing rather than calculating the hole size directly from the nominal thread diameter.

3. Blue Zinc Coating and Installation Damage

Zinc electroplating provides corrosion protection through a coating system applied to the steel substrate.

During rivet nut installation, local deformation and contact with the mounting hole may affect coating condition.

For applications requiring defined corrosion performance, engineers should consider:

• Coating thickness

• Passivation type

• Installation-induced coating damage

• Exposed steel surfaces

• Environmental exposure

• Post-installation corrosion testing where necessary

ASTM B633 and ISO 2081 may be referenced where applicable.

4. Blue Zinc Versus Color Zinc — Engineering Comparison

Color alone does not establish coating thickness, passivation chemistry, or corrosion test performance.

For dual-sourcing or supplier substitution, equivalent coating performance should be verified rather than assumed.

5. Spin-Out Torque and Repeated Screw Assembly

Spin-out torque is a key performance characteristic for knurled rivet nuts.

It describes the resistance of the installed insert to rotation relative to the mounting panel.

For repeated assembly applications, evaluate:

• Initial spin-out torque

• Performance after repeated tightening

• Thread integrity

• Panel deformation

• Installation consistency

• Coating condition

OEM acceptance criteria should reflect the intended application.

6. Pull-Out Resistance and Panel Bearing

Pull-out resistance depends on the formed backside retention section, panel material, hole dimensions, and installation process.

The flat head provides a bearing surface on the accessible side of the panel.

For thin or soft materials, evaluate local deformation and pull-through risk.

Mechanical strength should be confirmed through representative testing rather than assumed from the steel material alone.

7. Grip Range and Installation Thickness

The published product-series grip range is 0.5–6.5 mm (approximately 0.020–0.256 in).

Individual rivet nut configurations may cover narrower thickness ranges.

For multilayer assemblies, the effective installation thickness must be verified.

Coatings, washers, and local panel geometry may influence the final assembly conditions.

8. Installation Procedure

1. Confirm the rivet nut configuration and approved drawing.

2. Prepare the specified mounting hole.

3. Remove burrs and inspect the panel surface.

4. Select the correct installation mandrel.

5. Insert the knurled body into the mounting hole.

6. Seat the flange against the panel.

7. Keep the setting tool perpendicular to the panel.

8. Apply the approved installation stroke or force.

9. Inspect the formed backside retention section.

10. Verify thread integrity and rotational retention where required.

Manual, pneumatic, or automated setting equipment may be used when compatible with the selected product.

9. Open-End Thread Engagement

The open-end design allows a mating screw to extend through the threaded barrel when sufficient backside clearance is available.

Engineers should verify:

• Mating screw length

• Thread engagement

• Clamped component thickness

• Backside clearance

• Interference with adjacent components

Open-end rivet nuts do not provide an inherently sealed threaded connection.

10. Galvanic Compatibility and Mixed-Metal Assemblies

When zinc-plated steel rivet nuts are installed in aluminum or other dissimilar metal panels, the complete assembly should be evaluated for galvanic corrosion risk.

Potential concerns include:

• Dissimilar metal contact

• Moisture exposure

• Coating damage

• Exposed mounting hole edges

• Long-term environmental conditions

Protective coatings, isolation measures, or alternative materials may be required for certain environments.

11. OEM Validation and Inspection

Representative validation may include:

• Mounting hole inspection

• Knurl geometry inspection

• Installation stroke or force verification

• Backside deformation inspection

• Flange seating

• Thread integrity

• Spin-out torque

• Axial pull-out resistance

• Repeated screw assembly

• Panel deformation

• Coating condition

• Corrosion testing where specified

Mechanical performance requirements should be established according to the OEM application.

Technical Drawings and CAD

The existing product information references detailed specification PDF pages 91–92 and related CAD documentation.

Please confirm the applicable drawing revision and dimensions before finalizing mounting hole size, flange geometry,

 body length, knurl profile, or individual grip range.

OEM Technical RFQ Checklist

For accurate quotation and engineering review, please provide:

• Required metric or Unified inch thread size

• Panel material and thickness, in mm or inches

• Mounting hole diameter and tolerance

• Required grip range

• Flange dimensions

• Knurl geometry requirements, if specified

• Mating screw size and tightening torque

• Spin-out and pull-out performance requirements

• Blue zinc coating specification

• Corrosion resistance requirements

• Approved drawing or CAD model

• Inspection and documentation requirements

• Sample quantity

• Initial order quantity and annual demand forecast

JUXIN FASTENERS supports drawing-based sourcing inquiries for standard and custom industrial blind rivet nut requirements.

Why Use Blue Zinc Knurled Blind Rivet Nuts?

These rivet nuts combine a steel threaded body, zinc-plated surface, and knurled external geometry.

The knurled body is intended to increase engagement with the mounting material and may improve resistance to rotation compared with a smooth-body insert under comparable conditions.

The blue zinc finish provides a specified surface appearance and corrosion protection system suitable for evaluation in industrial assemblies.

However, coating color alone does not establish corrosion performance. OEM buyers should specify zinc thickness, passivation type, and corrosion test requirements.

Typical Industrial Applications

Electrical Enclosures and Control Cabinets

Blue zinc knurled rivet nuts can provide threaded mounting points for brackets, access covers, and removable equipment panels.

Their one-sided installation capability is useful where the reverse side of the sheet metal cannot be accessed.

For applications requiring electrical continuity or grounding, coating effects and contact resistance must be evaluated.

Industrial Machinery and Equipment Housings

Suitable applications may include fabricated steel covers, guards, access panels, mounting brackets, and equipment housings.

Knurled-body engagement may be useful where repeated maintenance requires screw removal and reinstallation.

Automotive and Transportation Equipment

Potential applications include non-critical brackets, interior mounting components, and fabricated sheet metal assemblies.

Vibration resistance, installation retention, and joint reliability must be validated for the intended operating conditions.

HVAC and Refrigeration Equipment

These inserts may be used in fabricated housings, equipment covers, and sheet metal mounting structures.

Corrosion protection should be selected according to humidity, condensation, and environmental exposure requirements.

Rail Vehicle Interior Assemblies

Knurled steel rivet nuts may be considered for selected non-structural interior equipment and access panels, subject to engineering approval and applicable project requirements.

General Sheet Metal Fabrication

Blue zinc knurled rivet nuts can provide threaded fastening points where thin material cannot support sufficient direct thread engagement.

They can be installed using compatible blind rivet nut setting equipment without requiring backside access.

Blue Zinc Versus Color Zinc Rivet Nuts

JUXIN FASTENERS offers related knurled steel rivet nut configurations with different zinc-plated surface finishes.

Blue zinc and color zinc are not interchangeable coating specifications solely because both are zinc-plated steel.

The final selection should consider:

• Zinc coating thickness

• Passivation chemistry

• Corrosion resistance requirements

• Surface appearance

• Environmental exposure

• Restricted-substance requirements

• Customer-approved coating specification

A different coating appearance does not automatically indicate superior corrosion resistance.

For OEM projects, the coating system should be defined by the technical drawing or purchasing specification.

OEM Engineering and Procurement Support

JUXIN FASTENERS supports industrial purchasing and drawing-based sourcing requirements for blue zinc knurled steel blind rivet nuts.

Engineering teams can submit mounting hole dimensions, panel thickness, knurl engagement requirements, and mechanical retention criteria.

Strategic sourcing teams and purchasing managers can provide approved drawings, coating specifications, order quantities, 

annual demand forecasts, inspection requirements, and packaging instructions.

Request an OEM Quotation

For blue zinc-plated knurled steel blind rivet nuts and custom industrial threaded inserts, contact:

JUXIN FASTENERS

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

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

Please provide your technical drawing, coating requirements, quantities, and purchasing specifications for quotation review.

Packaging & OEM Ordering — Blue Zinc Knurled Steel Blind Rivet Nuts

Standard Export Packaging

JUXIN FASTENERS provides industrial export packaging for blue zinc knurled steel blind rivet nuts to support product protection, handling, storage, and international transportation.

The standard packaging arrangement includes protective inner plastic bags, outer cartons, and palletized shipment where required.

Reference Packaging Dimensions

These dimensions are reference packaging sizes. Actual carton quantities, dimensions, and pallet arrangements are confirmed according to product size and purchase order requirements.

Product Protection and Identification

Packaging arrangements may include:

• Protective plastic inner bags

• Reinforced export cartons

• Moisture-resistant protection where required

• Product identification labels

• Part number and specification marking

• Batch identification

• Quantity labels

• Palletized shipment where required

Packaging and identification requirements should be agreed before order confirmation.

Customized OEM Packaging

Customer-specific packaging options can be reviewed, including:

• Private labeling

• Customized barcode labels

• Customer part-number identification

• Specified carton dimensions

• Customer-defined packing quantities

• Special pallet configurations

• Customer-specific marking and traceability requirements

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

OEM and Industrial Bulk Purchasing

JUXIN FASTENERS supports purchasing inquiries from OEM manufacturers, strategic sourcing teams, 

supplier development professionals, and industrial equipment manufacturers.

For quotation review, please provide:

• Required thread size and product configuration

• Approved technical drawing and revision

• Material and blue zinc coating requirements

• Panel thickness and grip range

• Installation and mechanical performance requirements

• Inspection and documentation requirements

• Packaging and labeling specifications

• Initial order quantity

• Annual demand forecast

• Requested delivery schedule

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

Request an OEM Quotation

For blue zinc knurled steel blind rivet nuts, custom threaded inserts, and industrial bulk purchasing requirements, contact:

JUXIN FASTENERS

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

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

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