---
title: "What Are Custom Machined Component Used For?"
description: "Custom Machined Components are used for a specific function defined by the part drawing rather than by a catalog fastener standard."
url: https://engineeringhardware.com/applications/cad-svg-115-genericpart/
source: Engineering Hardware & Fasteners
---

# What Are Custom Machined Component Used For?

General Components · ISO / DIN · Application guide

Typical applications, the industries that specify custom machined component, and how to choose the right size, material and finish for the joint.

Custom Machined Components are used for a specific function defined by the part drawing rather than by a catalog fastener standard. They are manufactured to ISO / DIN, and selection is driven by the nominal size, the fit and tolerance the assembly requires, and the service environment.

- **Primary duty:** A specific function defined by the part drawing rather than by a catalog fastener standard
- **Governing standard:** ISO / DIN
- **Nominal size range:** Size 1 to Size 8
- **Category:** General Components

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

![What Are Custom Machined Component Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/06/Custom-Machined-Component-—-ISO-DIN-Series-115-—-ISO-DIN.webp)

Custom Machined Components (ISO / DIN) are specified where the joint requires a specific function defined by the part drawing rather than by a catalog fastener standard. The sections below cover the typical end-uses by industry, the size and material decisions for each, assembly practice, and the applications this fastener type is not suited to. Stocked across roughly 1 mm to 8 mm, they cover general to heavy-duty work.

## Typical Applications for Custom Machined Component — ISO / DIN (Series 130)

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.

## How to Specify Custom Machined Component — ISO / DIN (Series 130) for Your Application

- **Size:** Select on nominal size, and confirm it against the mating feature in the assembly. This product spans 1 mm–8 mm; 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 is a trade-series article rather than one covered by a published dimensional standard, so dimensions can differ between manufacturers. Quote the dimensions you need — or the part you are replacing — rather than a standard number.

## Where Custom Machined Component — ISO / DIN (Series 130) 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 custom machined component outside the standard range?

With no standard to depart from, the tolerance scheme is the specification — which dimensions are critical, and which are simply nominal. Made by warm forging or thread turning.

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

[Custom machined component manufacturing](https://engineeringhardware.com/custom/components/)[Send a drawing](https://engineeringhardware.com/custom/components/#rfq)

## Technical Drawing

Dimensioned line drawing of Size 1 Custom Machined Component — ISO / DIN (Series 130). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Outer diameter / width (mm):** 10
- **Length / height (mm):** 20
- **Bore / thread (mm):** 6
- **Material:** C45 carbon steel

## Dimensions & Specifications (ISO / DIN)

| Size designation | Outer diameter / width (mm) | Length / height (mm) | Bore / thread (mm) | Material | Reference standard |
| --- | --- | --- | --- | --- | --- |
| Size 1 | 10 | 20 | 6 | C45 carbon steel | GB/T 1804-m |
| Size 2 | 12 | 25 | 8 | C45 carbon steel | GB/T 1804-m |
| Size 3 | 16 | 32 | 10 | C45 carbon steel | GB/T 1804-m |
| Size 4 | 20 | 40 | 12 | C45 carbon steel | GB/T 1804-m |
| Size 5 | 25 | 50 | 16 | C45 carbon steel | GB/T 1804-m |
| Size 6 | 32 | 63 | 20 | C45 carbon steel | GB/T 1804-m |
| Size 7 | 40 | 80 | 25 | C45 carbon steel | GB/T 1804-m |
| Size 8 | 50 | 100 | 30 | C45 carbon steel | GB/T 1804-m |

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

### What are Custom Machined Component — ISO / DIN (Series 130) used for?

A specific function defined by the part drawing rather than by a catalog fastener standard. They are supplied to ISO / DIN.

### Which industries use Custom Machined Component — ISO / DIN (Series 130)?

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 Custom Machined Component — ISO / DIN (Series 130)?

Select on nominal size and on the fit the assembly requires. This product is available from 1 mm to 8 mm; the full dimension table on this page lists each size.

### Are Custom Machined Component — ISO / DIN (Series 130) made to a recognized standard?

Yes — they are manufactured to ISO / DIN, so dimensions are interchangeable between suppliers when you quote the standard on your order.

### Can I get a quote for Custom Machined Component — ISO / DIN (Series 130) 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: [Custom Machined Component — ISO / DIN (Series 130) — specifications & sizes](https://engineeringhardware.com/fastener/cad-svg-130-genericpart/)

### Custom Machined Component — ISO / DIN (Series 130) Specification Guides

### Related Fastener Applications