---
title: "What Are Stainless Knurled Countersunk Blind Rivet Nuts Used For?"
description: "Stainless Knurled Countersunk Blind Rivet Nuts (Trade series (Bollhoff RIVKLE stainless-steel series)) are used for flush countersunk blind threads with a kn…"
url: https://engineeringhardware.com/applications/stainless-knurled-countersunk-blind-rivet-nuts/
source: Engineering Hardware & Fasteners
---

# What Are Stainless Knurled Countersunk Blind Rivet Nuts Used For?

Nuts · Trade series (Bollhoff RIVKLE stainless-steel series) · Application guide

Typical applications, the industries that specify stainless knurled countersunk blind rivet nuts, and how to choose the right size, material and finish for the joint.

Stainless Knurled Countersunk Blind Rivet Nuts are used for flush countersunk blind threads with a knurled body in thin panels. They are manufactured to Trade series (Bollhoff RIVKLE stainless-steel series), and the choice of size, property class and finish is driven by the load in the joint and the environment it sits in.

- **Primary duty:** Flush countersunk blind threads with a knurled body in thin panels
- **Governing standard:** Trade series (Bollhoff RIVKLE stainless-steel series)
- **Thread size range:** M3 to M4
- **Category:** Nuts

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

![What Are Stainless Knurled Countersunk Blind Rivet Nuts Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/Stainless-Knurled-Countersunk-Blind-Rivet-Nuts.webp)

Stainless Knurled Countersunk Blind Rivet Nuts are selected when an assembly calls for flush countersunk blind threads with a knurled body in thin panels. This application guide to the Trade series (Bollhoff RIVKLE stainless-steel series) type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly M3 to M4, they cover light-duty and instrument-scale work.

## Typical Applications for Stainless Knurled Countersunk Blind Rivet Nuts

The most common settings where these are specified:

- **Automotive interiors:** flush threaded mounting points behind trim and finished panels.
- **Laboratory equipment:** stainless blind threads in cleanable covers and guards.
- **Electronic housings:** serviceable threads in thin sheet where rotation must be controlled.
- **Precision fabrication:** countersunk blind inserts below the finished panel face.

Product catalog

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## How to Specify Stainless Knurled Countersunk Blind Rivet Nuts for Your Application

- **Size:** Match the nominal size to the mating thread or hole. This product spans M3–M4; check the full table below for the exact dimensions of each size.
- **Locking & grade:** Match the strength grade to the bolt, and choose a locking style (nyloc, all-metal, serrated flange) if the joint sees vibration.
- **Environment:** For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- **Standard:** This product is supplied to Trade series (Bollhoff RIVKLE stainless-steel series). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Installation & Assembly Practice

- Run the nut down by hand before applying the wrench to catch cross-threading early.
- Tighten the nut rather than the bolt head where access allows — the torque-to-preload relation is more consistent.
- For locking styles, note that nyloc inserts are single-use in critical joints and lose grip above roughly 120 °C.

## Common Selection Mistakes with Stainless Knurled Countersunk Blind Rivet Nuts

- Pairing a high-class bolt with a lower-class nut — the nut strips before the bolt reaches proof load; the nut class must meet or exceed the bolt class.
- Using a plain nut with a spring washer in severe vibration instead of a prevailing-torque locking nut.
- Re-using nyloc nuts in critical joints.

## Where Stainless Knurled Countersunk Blind Rivet Nuts Are Not the Right Choice

Not on their own — they need a matching bolt or stud — and a plain nut is not a substitute for a locking type under heavy vibration.

Custom manufacturing · Made to drawing

## Need a stainless knurled countersunk blind rivet nuts outside the standard range?

Height and across-flats are the two most often changed — a thinner nut for clearance, a larger hex for a tool that is already on the line. Made by cold heading or tapping.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom nut manufacturing](https://engineeringhardware.com/custom/nuts/)[Send a drawing](https://engineeringhardware.com/custom/nuts/#rfq)

## Technical Drawing

Dimensioned line drawing of M3 Stainless Knurled Countersunk Blind Rivet Nuts to Trade series (Bollhoff RIVKLE stainless-steel series). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Body diameter (mm):** 8.8
- **Body length (mm):** 7.0
- **Grip range (mm):** 1.3~2.0
- **Hole diameter (mm):** 5.0
- **Countersink thickness (mm):** 0.9
- **End options:** open / closed

## Dimensions & Specifications (Trade series (Bollhoff RIVKLE stainless-steel series))

| Thread size | Body diameter (mm) | Body length (mm) | Grip range (mm) | Hole diameter (mm) | Countersink thickness (mm) | End options |
| --- | --- | --- | --- | --- | --- | --- |
| M3 | 8.8 | 7.0 | 1.3~2.0 | 5.0 | 0.9 | open / closed |
| M3 | 9.9 | 7.0 | 2.0~3.0 | 5.0 | 0.9 | open / closed |
| M4 | 9.3 | 8.0 | 1.3~2.0 | 6.0 | 0.9 | open / closed |
| M4 | 10.3 | 8.0 | 2.0~3.0 | 6.0 | 0.9 | open / closed |

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### Are Stainless Knurled Countersunk Blind Rivet Nuts made to a recognized standard?

Yes — they are manufactured to Trade series (Bollhoff RIVKLE stainless-steel series), so dimensions are interchangeable between suppliers when you quote the standard on your order.

### What are Stainless Knurled Countersunk Blind Rivet Nuts used for?

Flush countersunk blind threads with a knurled body in thin panels. They are supplied to Trade series (Bollhoff RIVKLE stainless-steel series).

### Which industries use Stainless Knurled Countersunk Blind Rivet Nuts?

They are commonly specified in laboratory equipment, electronic housings and precision fabrication, among other sectors.

### How do I choose the right size of Stainless Knurled Countersunk Blind Rivet Nuts?

Match the nominal size to the mating thread or hole. This product is available from M3 to M4; the full dimension table on this page lists each size.

### Can I get a quote for Stainless Knurled Countersunk Blind Rivet Nuts in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.

## Related Pages

Product page: [Stainless Knurled Countersunk Blind Rivet Nuts — specifications & sizes](https://engineeringhardware.com/fastener/stainless-knurled-countersunk-blind-rivet-nuts/)

### Stainless Knurled Countersunk Blind Rivet Nuts Specification Guides

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