Tri Head Screws

Custom and Special Tri Head Screws

Pattern Fasteners manufactures standard, special and custom tri head screws for security, industrial and specialist engineering applications.

Tri head screws feature a distinctive triangular drive or head profile that requires a corresponding tool for installation or removal. This makes them suitable for applications where conventional slotted, Phillips or hex drives would provide insufficient resistance to unauthorised access.

We manufacture tri head screws to customer drawings, existing samples and bespoke specifications, with options for non-standard dimensions, specialist threads, materials, finishes and drive geometries.

What Are Tri Head Screws?

Tri head screws use a triangular drive profile rather than a conventional screw recess.

Because the drive cannot normally be operated using common tools, tri head screws can help discourage casual tampering, unauthorised removal or interference with an assembly.

They are commonly used in applications where:

• Access needs to be restricted

• Tamper resistance is required

• Equipment is located in public areas

• Components must remain securely fastened

• Maintenance should only be carried out by authorised personnel

• A specialist drive profile is specified

The exact head and drive geometry can vary according to the component and application.

Custom Tri Head Screws

Many specialist applications require tri head screws that cannot be sourced as standard catalogue components.

Pattern Fasteners can manufacture screws with:

• Metric and imperial threads

• Standard and non-standard diameters

• Fine and coarse thread pitches

• Bespoke overall lengths

• Custom triangular head dimensions

• Specialist drive depths and profiles

• Fully or partially threaded designs

• Custom point styles

• Reduced or modified shanks

• Drilled or machined features

• Heat treatment and controlled hardness

• Protective and decorative finishes

Components can be manufactured from your technical drawing, existing sample or individual specification.

Tri Head Security Screws

Tri head screws are often selected as a form of security or tamper-resistant fastener.

The triangular profile requires the correct matching tool, helping reduce the likelihood of removal using standard screwdrivers, sockets or hex keys.

They can be particularly useful where the fastener needs to remain removable for authorised servicing while still discouraging casual interference.

For applications requiring alternative security drive profiles, Pattern Fasteners can also manufacture other specialist security screws.

Materials and Finishes

Tri head screws can be manufactured in a wide range of materials depending on the required mechanical properties and operating environment.

Options may include:

• Carbon steel

• Alloy steel

• Stainless steel

• Brass

• Aluminium

• Titanium

• Specialist and non-ferrous alloys

Protective and decorative finishes can also be incorporated into the specification, including:

• Bright zinc plating

• Chemical black

• Phosphate coating

• Tin plating

• Chrome plating

• Customer-specified coatings

Heat treatment and specified hardness can also be included where required.

Applications for Tri Head Screws

Tri head screws can be used across a wide range of industrial, commercial and security-sensitive applications.

Typical uses include:

• Electrical enclosures

• Access panels

• Public infrastructure

• Machinery and industrial equipment

• Transport equipment

• Security systems

• Street furniture

• Retail fixtures

• Protective housings

• Automotive assemblies

• Specialist engineering equipment

• Vandal-resistant installations

Manufactured to Your Specification

Pattern Fasteners has manufactured special and non-standard fasteners in the West Midlands since 1981.

Customers choose us for:

• Tri head screws manufactured to drawings or samples

• Bespoke triangular drive profiles

• Non-standard dimensions

• Metric and imperial thread forms

• Specialist materials

• Heat treatment and controlled hardness

• Protective and decorative finishes

• Small batches and repeat production quantities

• UK-based manufacturing support

Request a Quote for Custom Tri Head Screws

Need a tri head screw with a non-standard thread, length, drive profile or material?

Send us your drawing, sample or specification and our experienced team can review the dimensions, drive geometry, material, finish and production requirements for your application.