---
title: "What Are Threaded Shaft Collars Used For?"
description: "Threaded Shaft Collars (Trade series (threaded-bore shaft collars)) are used for the mechanical function defined by its drawing and dimensional table."
url: https://engineeringhardware.com/applications/threaded-shaft-collars/
source: Engineering Hardware & Fasteners
---

# What Are Threaded Shaft Collars Used For?

Shaft Collars · Trade series (threaded-bore shaft collars) · Application guide

Typical applications, the industries that specify threaded shaft collars, and how to choose the right size, material and finish for the joint.

Threaded Shaft Collars are used for the mechanical function defined by its drawing and dimensional table. They are manufactured to Trade series (threaded-bore shaft collars), and selection is driven by the thread size, the fit and tolerance the assembly requires, and the service environment.

- **Primary duty:** The mechanical function defined by its drawing and dimensional table
- **Governing standard:** Trade series (threaded-bore shaft collars)
- **Thread size range:** M6 x 1.0 to M20 x 2.5
- **Category:** Shaft Collars

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

![What Are Threaded Shaft Collars Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/Threaded-Shaft-Collars.webp)

Application guide for Threaded Shaft Collars to Trade series (threaded-bore shaft collars). The core duty of the type is the mechanical function defined by its drawing and dimensional table. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly M6 to M20, they cover general to heavy-duty work.

## Typical Applications for Threaded Shaft Collars

The most common settings where these are specified:

- **General machine building:** fastening covers, brackets, motors and sub-assemblies on production equipment.
- **Maintenance & repair (MRO):** a stocked size for servicing existing plant where the original fastener spec must be matched.
- **Fabrication & metalwork:** bench and on-site assembly of steel frames, enclosures and weldments.

Product catalog

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## How to Specify Threaded Shaft Collars for Your Application

- **Size:** Match the nominal size to the mating thread or hole. This product spans M6–M20; check the full table below for the exact dimensions of each size.
- **Material:** Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- **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 (threaded-bore shaft collars). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Where Threaded Shaft Collars Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Custom manufacturing · Made to drawing

## Need a threaded shaft collars outside the standard range?

A non-standard shaft collar is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by thread turning or turning.

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

[Custom shaft collar manufacturing](https://engineeringhardware.com/custom/shaft-collars/)[Send a drawing](https://engineeringhardware.com/custom/shaft-collars/#rfq)

## Technical Drawing

Dimensioned line drawing of M6 x 1.0 Threaded Shaft Collars to Trade series (threaded-bore shaft collars). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Outside diameter (mm):** 18
- **Width (mm):** 9
- **Set by:** clamp screw

## Dimensions & Specifications (Trade series (threaded-bore shaft collars))

| Thread | Outside diameter (mm) | Width (mm) | Set by |
| --- | --- | --- | --- |
| M6 x 1.0 | 18 | 9 | clamp screw |
| M8 x 1.25 | 22 | 11 | clamp screw |
| M10 x 1.5 | 26 | 11 | clamp screw |
| M12 x 1.75 | 30 | 13 | clamp screw |
| M16 x 2.0 | 38 | 15 | clamp screw |
| M20 x 2.5 | 45 | 17 | clamp screw |

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 Threaded Shaft Collars made to a recognized standard?

Yes — they are manufactured to Trade series (threaded-bore shaft collars), so dimensions are interchangeable between suppliers when you quote the standard on your order.

### What are Threaded Shaft Collars used for?

The mechanical function defined by its drawing and dimensional table. They are supplied to Trade series (threaded-bore shaft collars).

### Which industries use Threaded Shaft Collars?

They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors.

### How do I choose the right size of Threaded Shaft Collars?

Match the nominal size to the mating thread or hole. This product is available from M6 to M20; the full dimension table on this page lists each size.

### Can I get a quote for Threaded Shaft Collars 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: [Threaded Shaft Collars — specifications & sizes](https://engineeringhardware.com/fastener/threaded-shaft-collars/)

### Threaded Shaft Collars Specification Guides

### Related Fastener Applications