---
title: "Linch Pins (Spring-Leg Retaining Pins)"
description: "Linch Pins (Spring-Leg Retaining Pins) to Trade series (linch pin): dia 6-12 mm, long 32-60 mm, dia 25-40 mm. 4 catalogued sizes with materials and finishes."
url: https://engineeringhardware.com/fastener/linch-pins/
source: Engineering Hardware & Fasteners
---

# Linch Pins (Spring-Leg Retaining Pins)

Pins · Detent, Hitch & Quick-Release Pins

4 catalogued sizes, dimensioned to Trade series (linch pin). Pick any row and the technical drawing redraws to it.

Linch Pins (Spring-Leg Retaining Pins) to Trade series (linch pin) are catalogued in dia 6-12 mm, with long 32-60 mm, dia 25-40 mm. 4 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

- **Standard:** Trade series (linch pin)
- **Dia:** 6-12 mm
- **Long:** 32-60 mm
- **Dia:** 25-40 mm
- **Catalogued sizes:** 4

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

![Linch Pins (Spring-Leg Retaining Pins) technical product image](https://engineeringhardware.com/wp-content/uploads/2026/08/Linch-Pins.webp)

Product catalog

## Related Detent, Hitch & Quick-Release Pins products

[![Locking Pin Stainless Steel Handle Positive Quick Release Ball Lock Pins Drop Stop Pin Locking Pin Stainless Steel Pull Pin](https://img.engineeringhardware.com/Locking-Pin-Stainless-Steel-Handle-Positive-Quick-Release-Ball-Lock-Pins-Drop-Stop-Pin-Locking-Pin-Stainless-Steel-Pull-Pin.webp)](https://engineeringhardware.com/product/locking-pin-stainless-steel-handle-positive-quick-release-ball-lock-pins-drop-stop-2/)

Ball-Lock & Quick-Release Pins

### [Locking Pin Stainless Steel Handle Positive Quick Release Ball Lock Pins Drop Stop Pin Locking Pin Stainless Steel Pull Pin](https://engineeringhardware.com/product/locking-pin-stainless-steel-handle-positive-quick-release-ball-lock-pins-drop-stop-2/)

Stainless Steel · ISO, GS, CE

**US$0.24 – 0.72**MOQ 100 pieces

[![Stainless Steel Push Button Quick Release Ball Lock Pin](https://img.engineeringhardware.com/Stainless-Steel-Push-Button-Quick-Release-Ball-Lock-Pin.webp)](https://engineeringhardware.com/product/stainless-steel-push-button-quick-release-ball-lock-pin/)

Ball-Lock & Quick-Release Pins

### [Stainless Steel Push Button Quick Release Ball Lock Pin](https://engineeringhardware.com/product/stainless-steel-push-button-quick-release-ball-lock-pin/)

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

**US$0.036 – 0.36**MOQ 1,000 pieces

[![Wire Hitch Lynch U-Clamp Stop Ball Lock Safety Quick Release Self-Locking Pin Button Pin T Handle Quick Release Pin B Type Quick Release Pin](https://img.engineeringhardware.com/Wire-Hitch-Lynch-U-Clamp-Stop-Ball-Lock-Safety-Quick-Release-Self-Locking-Pin-Button-Pin-T-Handle-Quick-Release-Pin-B-Type-Quick-Release-Pin.webp)](https://engineeringhardware.com/product/wire-hitch-lynch-u-clamp-stop-ball-lock-safety-quick-release-self-locking-pin-button/)

Ball-Lock & Quick-Release Pins

### [Wire Hitch Lynch U-Clamp Stop Ball Lock Safety Quick Release Self-Locking Pin Button Pin T Handle Quick Release Pin B Type Quick Release Pin](https://engineeringhardware.com/product/wire-hitch-lynch-u-clamp-stop-ball-lock-safety-quick-release-self-locking-pin-button/)

Stainless Steel · ISO, GS, CE

**US$0.24 – 0.72**MOQ 100 pieces

[![OEM/ODM Top Manufacturer’s Vcn117 Quick Release Ball Lock Pin Amazing Service Quality Fasteners at Competitive Price](https://img.engineeringhardware.com/OEM-ODM-Top-Manufacturer-s-Vcn117-Quick-Release-Ball-Lock-Pin-Amazing-Service-Quality-Fasteners-at-Competitive-Price.webp)](https://engineeringhardware.com/product/oem-odm-top-manufacturers-vcn117-quick-release-ball-lock-pin-amazing-service-quality/)

Ball-Lock & Quick-Release Pins

### [OEM/ODM Top Manufacturer’s Vcn117 Quick Release Ball Lock Pin Amazing Service Quality Fasteners at Competitive Price](https://engineeringhardware.com/product/oem-odm-top-manufacturers-vcn117-quick-release-ball-lock-pin-amazing-service-quality/)

Stainless Steel · Custom

**US$1.19 – 7.19**MOQ 2 units

[![Quick Release B Type Ball Lock Pin](https://img.engineeringhardware.com/Quick-Release-B-Type-Ball-Lock-Pin.webp)](https://engineeringhardware.com/product/quick-release-b-type-ball-lock-pin/)

Ball-Lock & Quick-Release Pins

### [Quick Release B Type Ball Lock Pin](https://engineeringhardware.com/product/quick-release-b-type-ball-lock-pin/)

Stainless Steel · ISO

**US$4.80 – 6.00**MOQ 100 pieces

[![Stainless Steel Lock M6 Quick Release Pin with Knurled Handle (Black)](https://img.engineeringhardware.com/Stainless-Steel-Lock-M6-Quick-Release-Pin-with-Knurled-Handle-Black.webp)](https://engineeringhardware.com/product/stainless-steel-lock-m6-quick-release-pin-with-knurled-handle-black/)

Ball-Lock & Quick-Release Pins

### [Stainless Steel Lock M6 Quick Release Pin with Knurled Handle (Black)](https://engineeringhardware.com/product/stainless-steel-lock-m6-quick-release-pin-with-knurled-handle-black/)

DIN, ANSI, GB, JIS, GOST, Bsw · Stainless Steel

**US$0.11 – 0.12**MOQ 1 piece

[View all Ball-Lock & Quick-Release Pins →](https://engineeringhardware.com/fastener-products/pins-dowel-fasteners/ball-lock-quick-release-pins/) [Full product catalog](https://engineeringhardware.com/products/)

## Materials & Grades

Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents.

Stainless Steel38 Carbon Steel66 Alloy Steel41 Bearing Steel5 Spring Steel25 Aluminum and Aluminum Alloys21 Brass17 Bronze11 Copper8 Titanium and Titanium Alloys18 Nickel and Nickel Alloys22 Iron-Nickel and High-Temperature Alloys10 Tool Steel and Specialty Hardened Steel9 Structural and Construction Steel9

### Stainless Steel

#### Austenitic Stainless Steel

- A1 AISI 303 · SAE 303 · SUS303 · EN 1.4305 · X8CrNiS18-9
- A2 AISI 304 · SAE 304 · SUS304 · EN 1.4301 · X5CrNi18-10 · 06Cr19Ni10
- 304L AISI 304L · SUS304L · EN 1.4307 · X2CrNi18-9 · 022Cr19Ni10
- 302 AISI 302 · SUS302 · EN 1.4310
- 305 AISI 305 · SUS305 · EN 1.4303
- A4 AISI 316 · SAE 316 · SUS316 · EN 1.4401 · X5CrNiMo17-12-2 · 06Cr17Ni12Mo2
- 316L AISI 316L · SUS316L · EN 1.4404 · X2CrNiMo17-12-2 · 022Cr17Ni12Mo2
- 321 AISI 321 · SUS321 · EN 1.4541 · X6CrNiTi18-10
- 310 / 310S AISI 310 · AISI 310S · SUS310S · EN 1.4845
- 302HQ AISI 302HQ
- A3
- A5
- 347 AISI 347 · SUS347 · EN 1.4550 · X6CrNiNb18-10
- 309 / 309S AISI 309 · AISI 309S · SUS309S

#### Martensitic Stainless Steel

- AISI 410 SUS410 · EN 1.4006 · X12Cr13 · 12Cr13
- AISI 420 SUS420J1 · SUS420J2 · EN 1.4021 · EN 1.4028 · 20Cr13 · 30Cr13
- AISI 431 SUS431 · EN 1.4057 · X17CrNi16-2
- C1
- C3
- C4
- AISI 440A
- AISI 440B
- AISI 440C SUS440C · EN 1.4125

#### Ferritic Stainless Steel

- AISI 430 SUS430 · EN 1.4016 · X6Cr17 · 10Cr17
- F1
- AISI 434
- AISI 444

#### Precipitation-Hardening Stainless Steel

- 17-4 PH AISI 630 · UNS S17400 · SUS630 · EN 1.4542 · X5CrNiCuNb16-4
- 15-5 PH UNS S15500
- 17-7 PH UNS S17700

#### Duplex and Super Duplex Stainless Steel

- Duplex 2205 UNS S31803 · UNS S32205 · EN 1.4462
- Super Duplex 2507 UNS S32750 · EN 1.4410
- D2
- D4
- D6
- D8
- Lean Duplex 2101 UNS S32101
- Super Duplex S32760 UNS S32760 · EN 1.4501

### Carbon Steel

#### Low-Carbon Steel

- SAE 1006
- SAE 1008
- SAE 1010
- SAE 1018
- SAE 1020
- Q195
- Q235
- SAE 1012
- SAE 1015
- Q215
- ML08
- ML08Al
- ML10
- ML15
- ML20
- SWRCH6A
- SWRCH8A
- SWRCH10A
- SWRCH12A
- SWRCH15A
- SWRCH18A

#### Medium-Carbon Steel

- SAE 1035
- SAE 1045
- S45C
- C45
- SAE 1030
- SAE 1040
- SAE 1050
- 30
- 35
- 40
- 45
- 50
- S35C
- S40C
- S50C
- C35
- C40

#### High-Carbon Steel

- SAE 1060
- SAE 1070
- 65Mn
- SAE 1065
- SAE 1075
- SAE 1080
- SAE 1085
- SAE 1090
- SAE 1095
- 60
- 65
- 70
- 75
- 80
- 85

#### Cold-Heading Steel

- SWRCH22A
- 10B21
- SWRCH22K
- SWRCH25K
- SWRCH30K
- SWRCH35K
- SWRCH40K
- ML20Mn
- ML25
- ML30
- ML35
- ML40
- 15B25

### Alloy Steel

#### Chromium Steel

- 40Cr
- 45Cr
- AISI 5140
- SAE 5140
- AISI 5120
- SAE 5120
- SCr420
- SCr440

#### Chromium-Molybdenum Steel

- 35CrMo
- 42CrMo
- AISI 4140
- SCM435
- SCM440
- 42CrMo4
- 30CrMo
- AISI 4130
- SAE 4130
- SAE 4140
- AISI 4142
- AISI 4145
- SCM415
- SCM420
- SCM445
- EN 1.7220
- EN 1.7225
- 25CrMo4
- 34CrMo4

#### Nickel-Chromium-Molybdenum Steel

- AISI 4340
- SAE 4340
- 40CrNiMo
- SNCM439
- EN 1.6511
- 36CrNiMo4

#### Boron Alloy Steel

- 10B22
- 10B21
- 15B21
- 15B25
- 20MnTiB
- 20Mn2B
- 35VB
- 40MnB

### Bearing Steel

#### Bearing Steel

- GCr15
- AISI 52100 SAE 52100 · UNS G52986
- SUJ2
- 100Cr6 EN 1.3505
- GCr15SiMn

### Spring Steel

#### Carbon Spring Steel

- SAE 1065
- SAE 1070
- SAE 1075
- SAE 1080
- SAE 1095
- 65
- 70
- 75
- 80
- 65Mn

#### Silicon-Manganese Spring Steel

- 60Si2Mn
- 60Si2MnA
- SUP6
- SUP7

#### Chromium-Vanadium Spring Steel

- 50CrVA
- SAE 6150
- AISI 6150
- SUP10

#### Stainless Spring Steel

- AISI 301
- SUS301
- EN 1.4310
- AISI 302
- AISI 304
- AISI 316
- 17-7 PH

### Aluminum and Aluminum Alloys

#### Commercially Pure Aluminum

- 1050
- 1060
- 1070
- 1100

#### 2xxx Series Aluminum

- 2024
- 2011
- 2014
- 2017

#### 5xxx Series Aluminum

- 5052
- 5083
- 5754

#### 6xxx Series Aluminum

- 6061
- 6061-T6
- 6063
- 6082
- 6082-T6

#### 7xxx Series Aluminum

- 7075
- 7075-T6
- 7005
- 7050
- 7075-T73

### Brass

#### Free-Cutting Brass

- C36000
- H62
- HPb59-1
- C3601
- C3602
- C3604
- CuZn36Pb3
- CuZn39Pb3
- EN CW614N
- EN CW617N
- H65

#### Lead-Free Brass

- C69300
- C27450
- CW510L
- CW511L

#### Naval Brass

- C46400
- CuZn39Sn1

### Bronze

#### Silicon Bronze

- C65500
- C65100
- C65600

#### Phosphor Bronze

- C51000
- C52100
- CuSn6
- CuSn8

#### Aluminum Bronze

- C95400
- C95500
- C63000
- CuAl10Ni5Fe4

### Copper

#### Copper

- C11000
- T2
- C10100
- C10200
- C12200
- T1
- TU1
- TU2

### Titanium and Titanium Alloys

#### Commercially Pure Titanium

- Grade 2
- Grade 1
- Grade 3
- Grade 4
- TA1
- TA2
- TA3

#### Alpha-Beta Titanium Alloys

- Grade 5
- Ti-6Al-4V
- TC4
- UNS R56400

#### Low-Interstitial Grade

- Grade 23
- Ti-6Al-4V ELI
- UNS R56407

#### Other Titanium Fastener Alloys

- Ti-6Al-6V-2Sn
- Ti-6Al-2Sn-4Zr-2Mo
- Beta-C titanium
- Ti-10V-2Fe-3Al

### Nickel and Nickel Alloys

#### Commercially Pure Nickel

- Nickel 200
- UNS N02200
- Nickel 201
- UNS N02201

#### Inconel Alloys

- Inconel 625 UNS N06625
- Inconel 718 UNS N07718
- Inconel 600 UNS N06600
- Inconel 601 UNS N06601
- Inconel 686 UNS N06686
- Inconel X-750 UNS N07750

#### Monel Alloys

- Monel 400 UNS N04400
- Monel K-500 UNS N05500

#### Hastelloy Alloys

- Hastelloy C-276 UNS N10276
- Hastelloy C-22 UNS N06022
- Hastelloy B-2 UNS N10665
- Hastelloy B-3 UNS N10675
- Hastelloy X UNS N06002

#### Other Nickel Alloys

- Alloy 20 UNS N08020
- Alloy 625
- Alloy 718
- Alloy 825 UNS N08825
- Alloy 925 UNS N09925

### Iron-Nickel and High-Temperature Alloys

#### A286

- A-286
- UNS S66286
- EN 1.4980

#### Invar

- Invar 36
- Alloy 36
- UNS K93600
- FeNi36

#### Alloy 42

- Alloy 42
- UNS K94100
- FeNi42

### Tool Steel and Specialty Hardened Steel

#### Tool Steel and Specialty Hardened Steel

- AISI D2
- AISI H13
- SKD11
- Cr12MoV
- AISI O1
- AISI A2
- AISI S7
- SKD61
- 9CrSi

### Structural and Construction Steel

#### Structural and Construction Steel

- ASTM A36
- Q235B
- Q355B
- S355JR
- Q235C
- Q355C
- S235JR
- S275JR
- S355J2

## Applications & Industries

Where Linch Pins are used, and what decides the specification in each case. Stocked from 6 to 12 (nominal diameter).

### Industries that specify Linch Pins

- **Agricultural machinery:** Hitching implements, guards and adjustable linkages.
- **Jigs, tooling & workholding:** Connections made and broken many times a day.
- **Sports & access equipment:** Folding frames, towers and staging.
- **Aerospace ground equipment:** Quick connections with a positive lock.
- **Jigs, tooling & fixtures:** Locating plates and tooling so they reassemble in the same position.
- **Machine building:** Hinges, pivots and linkages carrying light to moderate shear.

### Typical applications

- hitch and linch pins where a wire clip is enough
- connections made and released by hand in seconds
- ball-lock pins for a positive, load-rated lock
- quick connections made and broken by hand
- locating two parts to a repeatable position
- pivot and hinge joints loaded in shear

### Service conditions to specify against

- **Marine and coastal:** Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- **Hole preparation:** The hole is half the specification: a ground dowel needs a reamed H7 hole, a grooved or spring pin will hold in a drilled one.

[Full application guide: where Linch Pins are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/linch-pins/)

## Technical Drawing

Dimensioned line drawing of 6 Linch Pins (Spring-Leg Retaining Pins) to Trade series (linch pin). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Usable length (mm):** 32
- **Ring diameter (mm):** 25
- **Spring leg:** Integral wire
- **Working load (kg):** 200
- **Material:** Spring steel
- **Finish:** Zinc plated
- **Retainer:** Integral

## Dimensions & Specifications (Trade series (linch pin))

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

| Shank diameter d (mm) | Usable length (mm) | Ring diameter (mm) | Spring leg | Working load (kg) | Material | Finish | Retainer |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 6 | 32 | 25 | Integral wire | 200 | Spring steel | Zinc plated | Integral |
| 8 | 42 | 30 | Integral wire | 350 | Spring steel | Zinc plated | Integral |
| 10 | 50 | 35 | Integral wire | 550 | Spring steel | Zinc plated | Integral |
| 12 | 60 | 40 | Integral wire | 800 | Spring steel | Zinc plated | Integral |

Manufactured to Trade series (linch pin), Linch Pins (Spring-Leg Retaining Pins) are pins supplied by Engineering Hardware. The dimensional data, materials and selection notes are summarized here.

## What Are Linch Pins (Spring-Leg Retaining Pins)?

Linch Pins (Spring-Leg Retaining Pins) are pins defined by Trade series (linch pin). They are selected by nominal diameter and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.

## Materials & Finishes

Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.

## Specification Guides

Each size, material and standard of Linch Pins (Spring-Leg Retaining Pins) has its own reference page with the figures for that one configuration.

## Goes With

Hardware commonly specified alongside Linch Pins (Spring-Leg Retaining Pins).

## Pricing

Linch Pins (Spring-Leg Retaining Pins) are supplied to order. Pricing starts from approximately US$0.19 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

Custom manufacturing · Made to drawing

## Need a linch pins (spring-leg retaining pins) outside the standard range?

Tolerance class is what a special pin usually turns on — a locating pin and a retaining pin want very different fits in the same nominal size. 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)

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 is the controlling standard for Linch Pins (Spring-Leg Retaining Pins)?

Linch Pins (Spring-Leg Retaining Pins) are manufactured to Trade series (linch pin). The dimensional values on this page follow that standard.

### Which sizes of Linch Pins (Spring-Leg Retaining Pins) does Engineering Hardware supply?

The table on this page lists 4 sizes for Linch Pins (Spring-Leg Retaining Pins), ranging from 6 to 12. Sizes outside the table can be quoted on request.

### In which materials are Linch Pins (Spring-Leg Retaining Pins) supplied?

Linch Pins (Spring-Leg Retaining Pins) are supplied in hardened alloy steel and stainless, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Linch Pins (Spring-Leg Retaining Pins).

### How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.