---
title: "What Are Internally Threaded Dowel Pins (ISO 8735) Used For?"
description: "Internally Threaded Dowel Pins (ISO 8735) (ISO 8735) are used for precise location and light shear duty between two parts. Catalogued 6 mm to 20 mm."
url: https://engineeringhardware.com/applications/internally-threaded-dowel-pins/
source: Engineering Hardware & Fasteners
---

# What Are Internally Threaded Dowel Pins (ISO 8735) Used For?

Pins · ISO 8735 · Application guide

Typical applications, the industries that specify internally threaded dowel pins (iso 8735), and how to choose the right size, material and finish for the joint.

Internally Threaded Dowel Pins (ISO 8735) are used for precise location and light shear duty between two parts. They are manufactured to ISO 8735, and selection is driven by the nominal diameter, the fit and tolerance the assembly requires, and the service environment.

- **Primary duty:** Precise location and light shear duty between two parts
- **Governing standard:** ISO 8735
- **Nominal diameter range:** 6 mm to 20 mm
- **Category:** Pins

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

![What Are Internally Threaded Dowel Pins (ISO 8735) Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/06/Internally-Threaded-Dowel-Pin-—-GB-T-120.1-ISO-8735-Series-100-—-GB-T-120.1-ISO-8735.webp)

Internally Threaded Dowel Pins (ISO 8735) are used primarily for precise location and light shear duty between two parts. This page lists the industries and assemblies where they are specified, the selection criteria that matter for each application, installation practice, and the cases where a different fastener type is the correct choice. Parts are supplied to ISO 8735. Stocked across roughly 6 mm to 20 mm, they cover general to heavy-duty work.

## Typical Applications for Internally Threaded Dowel Pins (ISO 8735)

The most common settings where these are specified:

- **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.
- **Jigs & fixtures:** precise location of tooling plates and locating features.
- **Linkages & hinges:** pivot points carrying light shear.
- **Machine alignment:** dowelling mating housings so they reassemble in the same position.

Product catalog

## Related Dowel Pins products

[![Wholesale DIN6325 High Precision Stainless Steel 304 316 Solid Cylindrical Dowel Pin](https://img.engineeringhardware.com/Wholesale-DIN6325-High-Precision-Stainless-Steel-304-316-Solid-Cylindrical-Dowel-Pin.webp)](https://engineeringhardware.com/product/wholesale-din6325-high-precision-stainless-steel-304-316-solid-cylindrical-dowel-pin/)

Dowel & Locating Pins

### [Wholesale DIN6325 High Precision Stainless Steel 304 316 Solid Cylindrical Dowel Pin](https://engineeringhardware.com/product/wholesale-din6325-high-precision-stainless-steel-304-316-solid-cylindrical-dowel-pin/)

Stainless Steel · DIN, ANSI

**US$0.0012 – 11.96**MOQ 100 pieces

[![GB91 Stainless Steel Carbon Steel Split Pins DIN94 Split Cotter Pin Dowel Pin](https://img.engineeringhardware.com/GB91-Stainless-Steel-Carbon-Steel-Split-Pins-DIN94-Split-Cotter-Pin-Dowel-Pin.webp)](https://engineeringhardware.com/product/gb91-stainless-steel-carbon-steel-split-pins-din94-split-cotter-pin-dowel-pin/)

Dowel & Locating Pins

### [GB91 Stainless Steel Carbon Steel Split Pins DIN94 Split Cotter Pin Dowel Pin](https://engineeringhardware.com/product/gb91-stainless-steel-carbon-steel-split-pins-din94-split-cotter-pin-dowel-pin/)

Round Head · DIN, GB

**US$0.06 – 0.60**MOQ 10,000 pieces

[![Wholesale Metal Fastening 304/316/17-4 Stainless Steel Dowel Pins](https://img.engineeringhardware.com/Wholesale-Metal-Fastening-304-316-17-4-Stainless-Steel-Dowel-Pins-2.webp)](https://engineeringhardware.com/product/wholesale-metal-fastening-304-316-17-4-stainless-steel-dowel-pins-3/)

Dowel & Locating Pins

### [Wholesale Metal Fastening 304/316/17-4 Stainless Steel Dowel Pins](https://engineeringhardware.com/product/wholesale-metal-fastening-304-316-17-4-stainless-steel-dowel-pins-3/)

Stainless Steel · Bronze, Zinc Plated, Rainbow, Plain, Nickle Plated

**US$0.036 – 0.36**MOQ 1,000 pieces

[![CNC Customized Precision Turning Parts, Clear and Deburring Cylindrical Locating Guide Dowel Pin](https://img.engineeringhardware.com/CNC-Customized-Precision-Turning-Parts-Clear-and-Deburring-Cylindrical-Locating-Guide-Dowel-Pin.webp)](https://engineeringhardware.com/product/cnc-customized-precision-turning-parts-clear-and-deburring-cylindrical-locating/)

Dowel & Locating Pins

### [CNC Customized Precision Turning Parts, Clear and Deburring Cylindrical Locating Guide Dowel Pin](https://engineeringhardware.com/product/cnc-customized-precision-turning-parts-clear-and-deburring-cylindrical-locating/)

Stainless Steel · ISO

**US$3.60 – 9.00**MOQ 1 piece

[![OEM Standard Solid Cylindrical Dowel Pin Locating Fastener Accessory for Weichai Heavy Duty Diesel Engine](https://img.engineeringhardware.com/OEM-Standard-Solid-Cylindrical-Dowel-Pin-Locating-Fastener-Accessory-for-Weichai-Heavy-Duty-Diesel-Engine.webp)](https://engineeringhardware.com/product/oem-standard-solid-cylindrical-dowel-pin-locating-fastener-accessory-for-weichai/)

Dowel & Locating Pins

### [OEM Standard Solid Cylindrical Dowel Pin Locating Fastener Accessory for Weichai Heavy Duty Diesel Engine](https://engineeringhardware.com/product/oem-standard-solid-cylindrical-dowel-pin-locating-fastener-accessory-for-weichai/)

Wheel Loader Spare Parts · Engine Spare Parts

**US$0.54**MOQ 10 pieces

[![Saitong Hardware High Tolerance Dowel Pins for Aerospace Bracket Alignment Durable Metal Components Bulk Wholesalers](https://img.engineeringhardware.com/Saitong-Hardware-High-Tolerance-Dowel-Pins-for-Aerospace-Bracket-Alignment-Durable-Metal-Components-Bulk-Wholesalers.webp)](https://engineeringhardware.com/product/saitong-hardware-high-tolerance-dowel-pins-for-aerospace-bracket-alignment-durable/)

Dowel & Locating Pins

### [Saitong Hardware High Tolerance Dowel Pins for Aerospace Bracket Alignment Durable Metal Components Bulk Wholesalers](https://engineeringhardware.com/product/saitong-hardware-high-tolerance-dowel-pins-for-aerospace-bracket-alignment-durable/)

Decoration · Stainless Steel

**US$0.012 – 0.048**MOQ 300 pieces

[View all Dowel & Locating Pins →](https://engineeringhardware.com/fastener-products/pins-dowel-fasteners/dowel-locating-pins/) [Full product catalog](https://engineeringhardware.com/products/)

## How to Specify Internally Threaded Dowel Pins (ISO 8735) for Your Application

- **Size:** Select on nominal diameter, then on the hole tolerance and fit class — the fit, not the diameter alone, determines whether the part locates or slips. This product spans 6 mm–20 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 product is supplied to ISO 8735. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Installation & Assembly Practice

- Ream the hole to the specified fit class; a dowel pressed into a drilled-only hole will not locate accurately.
- Press pins in with steady force rather than hammer blows where possible, and chamfer the hole entry.

## Common Selection Mistakes with Internally Threaded Dowel Pins (ISO 8735)

- Using a dowel pin as a load-carrying shear bolt — dowels locate, they are not sized for sustained shear.
- Ignoring the fit class: a locational fit and an interference fit need different hole tolerances.

## Where Internally Threaded Dowel Pins (ISO 8735) Are Not the Right Choice

Not for carrying significant tensile or repeated heavy shear loads — use a bolt or a keyed joint for that.

Custom manufacturing · Made to drawing

## Need a internally threaded dowel pins (iso 8735) outside the standard range?

Diameter, length, tolerance class, hardness and end form are specifiable. Ground diameters are held after heat treatment rather than before. Made by cold heading or turning.

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

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

## Technical Drawing

Dimensioned line drawing of 6 Internally Threaded Dowel Pins (ISO 8735) to ISO 8735. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Internal thread:** M4
- **Thread depth (mm):** 10
- **Hole H7 (mm):** 6
- **Common length range (mm):** 16~60
- **Hardness (HRC):** 58-62
- **Extraction:** Threaded puller

## Dimensions & Specifications (ISO 8735)

| Pin diameter d m6 (mm) | Internal thread | Thread depth (mm) | Hole H7 (mm) | Common length range (mm) | Hardness (HRC) | Extraction | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 6 | M4 | 10 | 6 | 16~60 | 58-62 | Threaded puller | ISO 8735 |
| 8 | M5 | 12 | 8 | 20~80 | 58-62 | Threaded puller | ISO 8735 |
| 10 | M6 | 16 | 10 | 24~100 | 58-62 | Threaded puller | ISO 8735 |
| 12 | M6 | 20 | 12 | 26~120 | 58-62 | Threaded puller | ISO 8735 |
| 16 | M8 | 25 | 16 | 30~160 | 58-62 | Threaded puller | ISO 8735 |
| 20 | M10 | 28 | 20 | 40~200 | 58-62 | Threaded puller | ISO 8735 |

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 Internally Threaded Dowel Pins (ISO 8735) used for?

Precise location and light shear duty between two parts. They are supplied to ISO 8735.

### Which industries use Internally Threaded Dowel Pins (ISO 8735)?

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

### How do I choose the right size of Internally Threaded Dowel Pins (ISO 8735)?

Select on nominal diameter and on the fit the assembly requires. This product is available from 6 mm to 20 mm; the full dimension table on this page lists each size.

### What material should Internally Threaded Dowel Pins (ISO 8735) be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

### Can I get a quote for Internally Threaded Dowel Pins (ISO 8735) 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: [Internally Threaded Dowel Pins (ISO 8735) — specifications & sizes](https://engineeringhardware.com/fastener/internally-threaded-dowel-pins/)

### Internally Threaded Dowel Pins (ISO 8735) Specification Guides

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