---
title: "What Are Pin-in-Hex Tamper-Resistant Socket Screws Used For?"
description: "Pin-in-Hex Tamper-Resistant Socket Screws (ISO 4762) are used for fixings in public or unsupervised places that must resist casual removal with ordinary tool…"
url: https://engineeringhardware.com/applications/pin-in-hex-security-screws/
source: Engineering Hardware & Fasteners
---

# What Are Pin-in-Hex Tamper-Resistant Socket Screws Used For?

Screws · ISO 4762 · Application guide

Typical applications, the industries that specify pin-in-hex tamper-resistant socket screws, and how to choose the right size, material and finish for the joint.

Pin-in-Hex Tamper-Resistant Socket Screws are used for fixings in public or unsupervised places that must resist casual removal with ordinary tools. They are manufactured to ISO 4762, 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:** Fixings in public or unsupervised places that must resist casual removal with ordinary tools
- **Governing standard:** ISO 4762
- **Thread size range:** M4 to M12
- **Category:** Screws

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

![What Are Pin-in-Hex Tamper-Resistant Socket Screws Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/Tamper-Resistant-Screws-Drive-Detail.webp)

The primary duty of Pin-in-Hex Tamper-Resistant Socket Screws is fixings in public or unsupervised places that must resist casual removal with ordinary tools. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly M4 to M12, they cover general to heavy-duty work.

## Typical Applications for Pin-in-Hex Tamper-Resistant Socket Screws

The most common settings where these are specified:

- **Appliances & consumer goods:** high-volume assembly with power tools and consistent seating.
- **Machine guarding & panels:** removable access covers that are opened for service.
- **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

## Related Security & Tamper-Resistant Screws products

[![Stainless Steel M3m4m5m6 Thread Triangle Drive Security Screw](https://img.engineeringhardware.com/Stainless-Steel-M3m4m5m6-Thread-Triangle-Drive-Security-Screw.webp)](https://engineeringhardware.com/product/stainless-steel-m3m4m5m6-thread-triangle-drive-security-screw/)

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### [Stainless Steel M3m4m5m6 Thread Triangle Drive Security Screw](https://engineeringhardware.com/product/stainless-steel-m3m4m5m6-thread-triangle-drive-security-screw/)

Countersunk Head · DIN, ANSI, GB, JIS

**US$0.096 – 0.12**MOQ 1,000 pieces

[![Copper Plated Zinc Plated Stainless Steel Carbon Steel Self Tapping Screw DIN 912 Brass Hex Slot Pan Socket Head Security Screw for Machine Industry](https://img.engineeringhardware.com/Copper-Plated-Zinc-Plated-Stainless-Steel-Carbon-Steel-Self-Tapping-Screw-DIN-912-Brass-Hex-Slot-Pan-Socket-Head-Security-Screw-for-Machine-Industry.webp)](https://engineeringhardware.com/product/copper-plated-zinc-plated-stainless-steel-carbon-steel-self-tapping-screw-din-912/)

Security & Tamper-Resistant Screws

### [Copper Plated Zinc Plated Stainless Steel Carbon Steel Self Tapping Screw DIN 912 Brass Hex Slot Pan Socket Head Security Screw for Machine Industry](https://engineeringhardware.com/product/copper-plated-zinc-plated-stainless-steel-carbon-steel-self-tapping-screw-din-912/)

Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST

**US$0.012 – 0.06**MOQ 1,000 pieces

[![Security Screw for Plastics Torx Pan PT Thread Head Self Tapping Forming Screws](https://img.engineeringhardware.com/Security-Screw-for-Plastics-Torx-Pan-PT-Thread-Head-Self-Tapping-Forming-Screws.webp)](https://engineeringhardware.com/product/security-screw-for-plastics-torx-pan-pt-thread-head-self-tapping-forming-screws/)

Security & Tamper-Resistant Screws

### [Security Screw for Plastics Torx Pan PT Thread Head Self Tapping Forming Screws](https://engineeringhardware.com/product/security-screw-for-plastics-torx-pan-pt-thread-head-self-tapping-forming-screws/)

Pan Head · DIN, GB, GOST

**US$0.024 – 0.18**MOQ 2,000 pieces

[![SS316 Stainless Steel Security Torx Pin Self Drilling Tek Screw, Anti-Theft Anti-Corrosion Metal Roofing Fastener](https://img.engineeringhardware.com/SS316-Stainless-Steel-Security-Torx-Pin-Self-Drilling-Tek-Screw-Anti-Theft-Anti-Corrosion-Metal-Roofing-Fastener.webp)](https://engineeringhardware.com/product/ss316-stainless-steel-security-torx-pin-self-drilling-tek-screw-anti-theft-anti/)

Security & Tamper-Resistant Screws

### [SS316 Stainless Steel Security Torx Pin Self Drilling Tek Screw, Anti-Theft Anti-Corrosion Metal Roofing Fastener](https://engineeringhardware.com/product/ss316-stainless-steel-security-torx-pin-self-drilling-tek-screw-anti-theft-anti/)

Anti-Theft Self Drilling Tek Screw · DIN, GB

**US$0.012 – 0.12**MOQ 10,000 pieces

[![M4*12 Blackening/Blackened Finished Stainless Steel Torx with Column Round/ Pan Head Anti-Theft Sem/Combination Screw](https://img.engineeringhardware.com/M4-12-Blackening-Blackened-Finished-Stainless-Steel-Torx-with-Column-Round-Pan-Head-Anti-Theft-Sem-Combination-Screw.webp)](https://engineeringhardware.com/product/m4-12-blackening-blackened-finished-stainless-steel-torx-with-column-round-pan-head/)

Security & Tamper-Resistant Screws

### [M4*12 Blackening/Blackened Finished Stainless Steel Torx with Column Round/ Pan Head Anti-Theft Sem/Combination Screw](https://engineeringhardware.com/product/m4-12-blackening-blackened-finished-stainless-steel-torx-with-column-round-pan-head/)

Round Head · DIN, GB, ANSI, BSW, JIS

**US$0.0384 – 0.0768**MOQ 10,000 pieces

[![28mm Aluminum Anti-Theft Ropp Screw Cap for Oral Liquid or Healthcare](https://img.engineeringhardware.com/28mm-Aluminum-Anti-Theft-Ropp-Screw-Cap-for-Oral-Liquid-or-Healthcare.webp)](https://engineeringhardware.com/product/28mm-aluminum-anti-theft-ropp-screw-cap-for-oral-liquid-or-healthcare/)

Security & Tamper-Resistant Screws

### [28mm Aluminum Anti-Theft Ropp Screw Cap for Oral Liquid or Healthcare](https://engineeringhardware.com/product/28mm-aluminum-anti-theft-ropp-screw-cap-for-oral-liquid-or-healthcare/)

Die Cut Piece · Aluminum

**US$0.024 – 0.036**MOQ 50,000 pieces

[View all Security & Tamper-Resistant Screws →](https://engineeringhardware.com/fastener-products/screws/security-tamper-resistant-screws/) [Full product catalog](https://engineeringhardware.com/products/)

## How to Specify Pin-in-Hex Tamper-Resistant Socket Screws for Your Application

- **Size:** Match the nominal size to the mating thread or hole. This product spans M4–M12; check the full table below for the exact dimensions of each size.
- **Drive & head:** Pick the drive (socket, cross, slot) and head style for the tool access and seating surface; a recessed drive resists cam-out under power tools.
- **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 4762. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Installation & Assembly Practice

- Match the driver exactly to the recess (PH ≠ PZ; hex key sizes per ISO 2936) and keep the tool axial — side load is the main cause of stripped drives.
- In tapped holes, engage a thread length of at least 1× the nominal diameter in steel, 2× in aluminum.
- Set power tools to a torque that seats the head without embedding it into the mating surface.

## Common Selection Mistakes with Pin-in-Hex Tamper-Resistant Socket Screws

- Under-sizing the drive for the installation torque — a small recess at high torque strips before the screw is seated.
- Using a countersunk head in thin sheet where the countersink removes most of the load-bearing material.
- Specifying stainless in high-strength duty: A2-70 is roughly class 7 steel, not a 10.9 substitute.

## Where Pin-in-Hex Tamper-Resistant Socket Screws Are Not the Right Choice

Not for high-preload structural joints (use a property-class bolt and nut), and not in thin sheet where a self-drilling or self-tapping type suits better.

Custom manufacturing · Made to drawing

## Need a pin-in-hex tamper-resistant socket screws outside the standard range?

Thread size and pitch, length, property class, drive form, head geometry and head marking are all specifiable — the standard part is where it starts, not where it stops. Made by cold heading or warm forging.

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

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

## Technical Drawing

Dimensioned line drawing of M4 Pin-in-Hex Tamper-Resistant Socket Screws to ISO 4762. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Pitch (mm):** 0.7
- **Head diameter dk (mm):** 7.0
- **Head height k (mm):** 4.0
- **Socket size s (mm):** 3.0
- **Security key:** PH3
- **Common length range (mm):** 8~40

## Dimensions & Specifications (ISO 4762)

| Thread size | Pitch (mm) | Head diameter dk (mm) | Head height k (mm) | Socket size s (mm) | Security key | Common length range (mm) | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| M4 | 0.7 | 7.0 | 4.0 | 3.0 | PH3 | 8~40 | ISO 4762 |
| M5 | 0.8 | 8.5 | 5.0 | 4.0 | PH4 | 10~50 | ISO 4762 |
| M6 | 1.0 | 10.0 | 6.0 | 5.0 | PH5 | 12~60 | ISO 4762 |
| M8 | 1.25 | 13.0 | 8.0 | 6.0 | PH6 | 16~80 | ISO 4762 |
| M10 | 1.5 | 16.0 | 10.0 | 8.0 | PH8 | 20~90 | ISO 4762 |
| M12 | 1.75 | 18.0 | 12.0 | 10.0 | PH10 | 25~100 | ISO 4762 |

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 material should Pin-in-Hex Tamper-Resistant Socket Screws 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.

### Are Pin-in-Hex Tamper-Resistant Socket Screws made to a recognized standard?

Yes — they are manufactured to ISO 4762, so dimensions are interchangeable between suppliers when you quote the standard on your order.

### What are Pin-in-Hex Tamper-Resistant Socket Screws used for?

Fixings in public or unsupervised places that must resist casual removal with ordinary tools. They are supplied to ISO 4762.

### Which industries use Pin-in-Hex Tamper-Resistant Socket Screws?

They are commonly specified in fabrication & metalwork, electronics & enclosures and appliances & consumer goods, among other sectors.

### Can I get a quote for Pin-in-Hex Tamper-Resistant Socket Screws 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: [Pin-in-Hex Tamper-Resistant Socket Screws — specifications & sizes](https://engineeringhardware.com/fastener/pin-in-hex-security-screws/)

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