Stainless Steel Countersunk Head Open-End Blind Rivet Nuts

Stainless Steel Countersunk Head Open-End Blind Rivet Nuts – Technical Specifications

JUXIN FASTENERS supplies stainless steel countersunk head open-end round body blind rivet nuts for industrial OEM manufacturers, sheet-metal fabricators, mechanical design engineers, and global procurement teams.

These internally threaded inserts are designed for applications requiring one-sided installation and reduced flange projection through a properly prepared countersunk mounting hole.

The full countersunk head provides a potential flush mounting surface, while the open-end body allows a mating screw to extend through the insert where sufficient backside clearance is available.

Product Specifications

The stated grip range represents the product family. Exact grip limits, flange dimensions, body lengths, and mounting-hole requirements must be confirmed for each thread size.

Engineering Features and Selection Considerations

1. Full Countersunk Head for Flush Mounting

The full countersunk head is designed to fit within a corresponding countersink in the parent material.

When the insert head and mounting-hole geometry are correctly matched, the flange can sit approximately flush with the surrounding surface.

This configuration is useful for equipment panels, overlapping sheet-metal components, close-fitting brackets, and assemblies where a protruding fastener head would interfere with adjacent parts.

However, a countersunk rivet nut does not automatically produce a flush surface.

Actual flushness depends on the countersink angle, countersink diameter, flange dimensions, panel thickness, and installation deformation.

Engineers should specify the required flushness tolerance and verify the installed condition rather than relying on the nominal head description alone.

2. Countersink Geometry and Remaining Panel Thickness

Countersunk rivet nuts require more mounting-hole preparation than standard flat-head or thin-head inserts.

The countersink removes material from the panel around the installation hole.

In thin sheet metal, excessive countersink depth may reduce the remaining material available to support the flange and resist installation or service loads.

For this reason, countersink depth and remaining panel thickness should be evaluated together.

Engineers should confirm the following:

• Countersink angle compatible with the selected insert

• Countersink major diameter

• Through-hole diameter and tolerance

• Panel thickness before countersinking

• Remaining material thickness beneath the countersink

• Installed flange height relative to the panel surface

Do not assume that all countersunk rivet nuts use the same countersink angle. The approved product drawing must govern the mounting geometry.

3. Round Body Design and Rotation Resistance

The round body allows installation in a compatible circular mounting hole.

Compared with non-round body configurations, round body inserts may simplify hole preparation.

However, resistance to insert rotation depends on the body geometry, hole dimensions, parent material, installation stroke, and achieved mechanical retention.

The supplied product information identifies a round body but does not establish a specific knurled or splined configuration for this item.

Therefore, rotational performance should be confirmed against the selected product drawing and validated test requirements.

Where high tightening torque or frequent screw removal is expected, engineers should assess spin-out torque rather than assuming that the countersunk head alone prevents rotation.

4. Open-End Configuration and Screw Engagement

The open-end design allows a mating screw or bolt to extend beyond the threaded insert when backside clearance is available.

This can provide additional screw-length flexibility compared with closed-end rivet nuts.

Nevertheless, longer screws must not interfere with internal equipment, wiring, moving components, or adjacent structures.

Design engineers should verify the required thread engagement, screw length, panel stack-up, and available backside clearance.

Where screw penetration or contamination entry through the barrel end must be prevented, a closed-end rivet nut may be a more suitable alternative.

5. Stainless Steel Material Selection

Stainless steel may offer corrosion-resistance advantages in selected industrial environments.

The original technical description references A2 stainless steel, while the confirmed product-family information identifies stainless steel without a verified grade-specific drawing.

The required material grade should therefore be confirmed during technical review.

For corrosive environments, designers should consider exposure conditions, cleaning chemicals, moisture, dissimilar-metal contact, and any required material documentation.

Stainless steel should not be assumed to provide equivalent corrosion performance across all grades and service environments.

6. Grip Range and Installation in Thicker Panels

This countersunk rivet nut family is identified with a grip range of 1.5–5.0 mm, depending on the selected size.

The range may support applications involving thicker sheet materials than certain thin-sheet rivet nut configurations.

However, the nominal panel thickness alone is not sufficient for selection.

Countersinking changes the local geometry around the installation hole, 

and the relationship between the specified grip range and prepared panel must be verified using the manufacturer's dimensional and installation requirements.

Engineers should avoid selecting an insert solely from the maximum published family grip value.

7. Installation Tooling and Process Control

Countersunk blind rivet nuts are installed from one accessible side using compatible rivet nut setting equipment.

Depending on the specific product and production requirements, installation may use manual, pneumatic, or cordless tooling.

Tool compatibility, mandrel size, setting stroke or force, and mounting-hole preparation must be checked before production.

Under-setting can result in inadequate mechanical retention.

Excessive setting may damage the insert, deform the panel, or affect thread quality.

For repeatable OEM assembly, installation parameters should be established through representative trials using the actual panel material and thickness.

Countersunk Head vs. Thin Head vs. Flat Head Rivet Nuts

Countersunk head rivet nuts are selected when a properly prepared recess can accommodate the flange and a flush mounting surface is required.

Thin head rivet nuts reduce head projection without necessarily requiring a full countersink, but they generally retain some flange height above the panel.

Flat head rivet nuts provide a larger exposed flange configuration where surface projection is acceptable and bearing area is a design consideration.

The correct choice depends on panel thickness, hole preparation capability, surface clearance, installation loads, and assembly requirements.

Industrial Applications and OEM Fastening Solutions

Automotive and Transportation

Countersunk stainless steel blind rivet nuts may be used in equipment brackets, service panels, fabricated housings, and close-fitting metal assemblies.

Flush mounting can help reduce interference between overlapping components.

Engineers should evaluate vibration, corrosion exposure, and the installation performance of the complete joint.

Electrical and Electronic Equipment

Potential applications include electrical cabinets, instrument housings, equipment mounting panels, and removable sheet-metal covers.

The countersunk flange can be useful where adjacent components require a relatively smooth mounting surface.

Electrical clearance and backside screw penetration must be considered because the insert has an open end.

Industrial Machinery

Applications include machine covers, access panels, guards, mounting brackets, and fabricated equipment enclosures.

For repeatedly serviced assemblies, engineers should evaluate thread durability, retention performance, and resistance to insert rotation.

HVAC and Appliance Manufacturing

Countersunk blind rivet nuts may be considered for sheet-metal cabinets, appliance housings, equipment covers, and brackets where flange projection must be minimized.

The suitability of the design depends on panel thickness, countersink geometry, and available installation clearance.

Railway and Transportation Equipment

Potential applications include non-safety-critical equipment panels, interior enclosures, and serviceable fabricated components.

Application-specific load, vibration, corrosion, and documentation requirements must be reviewed before use.

General OEM Sheet-Metal Fabrication

These inserts can provide reusable internal threads in fabricated panels and hollow sections where conventional nuts cannot be accessed from the rear.

They may also be considered where surface clearance requirements make conventional protruding rivet nut heads unsuitable.

Engineering Selection Checklist

Before approving a countersunk blind rivet nut, confirm:

• Required metric thread size

• Stainless steel grade and material specification

• Parent material and panel thickness

• Grip range for the selected insert

• Through-hole diameter and tolerance

• Countersink angle, diameter, and depth

• Remaining panel thickness after countersinking

• Flange diameter and installed flange height

• Body diameter and overall length

• Available backside installation clearance

• Screw length and required thread engagement

• Installation tooling and setting parameters

• Required spin-out, push-out, and pull-out performance

• Corrosion exposure and documentation requirements

Dimensional Standards and Engineering Verification

The selected insert must be evaluated against its approved product drawing and the applicable assembly requirements.

Metric internal threads may be specified using applicable ISO metric thread requirements.

Where inch-series threads are requested, the corresponding ASME/ANSI thread requirements must be identified separately.

Metric and UNC/UNF thread systems are not directly interchangeable.

Inch dimensions provided as conversions are reference values only and do not establish inch-thread product availability.

Applicable ISO, DIN, EN, ASTM, SAE, or ASME standards and test methods should be identified only where they are relevant to the actual material, thread, inspection, or application requirement.

A general reference to international standards should not be interpreted as product certification or verified conformity.

OEM Procurement and Supply Chain Considerations

For OEM purchasing teams, countersunk blind rivet nuts require more detailed dimensional review than a nominal thread size alone can provide.

Two products described as M6 countersunk rivet nuts may differ in flange geometry, body diameter, overall length, grip range, and installation requirements.

These differences can affect mounting-hole compatibility, installed flushness, and production consistency.

Before changing suppliers or approving an alternative part, procurement teams should confirm critical dimensions against the original drawing and evaluate samples in representative assemblies.

For recurring production programs, material specifications, inspection criteria, packaging requirements, traceability, and delivery schedules should be agreed upon during sourcing.

Custom OEM Countersunk Rivet Nut RFQ Requirements

Please provide:

• Product drawing or 3D CAD model

• Required thread size and annual demand

• Stainless steel grade

• Countersink angle and major diameter

• Mounting-hole diameter and tolerance

• Parent material and panel thickness

• Required installed flushness

• Body dimensions and grip range

• Screw length and backside clearance

• Installation method and performance requirements

• Inspection, documentation, and traceability needs

• Prototype or production quantities

• Delivery destination and purchasing schedule

JUXIN FASTENERS supports drawing-based technical reviews and OEM sourcing discussions for industrial blind rivet nuts and custom fastening components.

Material availability, dimensional requirements, production specifications, and inspection criteria should be confirmed before order approval.

Related Fastening Solutions

Thin Head Open-End Knurled Blind Rivet Nuts

An alternative for applications requiring reduced head projection without a full countersunk installation.

Thin Head Closed-End Knurled Blind Rivet Nuts

Suitable for applications requiring reduced flange projection and prevention of screw penetration through the insert barrel.

Flat Head Blind Rivet Nuts

An alternative where a larger exposed flange bearing surface is preferred and flush mounting is not essential.

Hex Body Blind Rivet Nuts

A potential solution for compatible non-round mounting holes where improved resistance to insert rotation is required.

Request an OEM Quotation

For stainless steel countersunk head open-end blind rivet nuts, custom threaded inserts, or drawing-specific OEM fastening solutions, 

contact JUXIN FASTENERS with your technical drawings and purchasing requirements.

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com

JUXIN FASTENERS – Industrial Blind Rivet Nuts and Custom OEM Fastening Solutions.

Packaging and Delivery – Stainless Steel Countersunk Blind Rivet Nuts

JUXIN FASTENERS reviews packaging arrangements according to product dimensions, order quantity, handling conditions, and OEM purchasing requirements.

Packaging Requirements

• Packaging quantity: Subject to order confirmation

• Inner packaging: According to approved packing instructions

• Outer packaging: According to shipment requirements

• Product labeling: Part number, thread size, and material information as required

• Batch identification: According to agreed traceability requirements

• Custom packaging: Subject to technical and commercial confirmation

Packaging Protection

Countersunk blind rivet nuts should be protected from unnecessary damage to the flange, internal threads, and body surfaces during handling, storage, and transportation.

Packaging selection should consider the product weight, quantity, and shipment conditions.

OEM Supply and Documentation

For recurring production programs, packaging quantities, labeling, inspection records, material documentation, and delivery requirements should be agreed upon before shipment.

Final packaging specifications are confirmed according to the approved order.

For OEM packaging requirements and quotations, contact info@juxinfasteners.com.

Website: www.juxinfasteners.com