Security Button Head Screw Sets M3–M8 — A2 Pin-TORX

Why choose these A2 security button head screw sets

Tamper-resistant button head machine screws fitted with a pin-in TORX recess — supplied as a complete kit with washers and your choice of nut. The pin in the centre of the head blocks a standard TORX bit, so the joint can only be opened with a matching security driver. A2 stainless steel keeps the assembly rust-free, and the kit format saves you sourcing matching components separately.

Sizes available

Bolt diameters M3, M4, M5, M6 and M8 across eight length options from 10mm up to 50mm. Each kit includes two Form A flat washers per bolt for the head and nut faces.

Pack options

Choose your nut style — standard hex nut, nylon lock nut for vibration resistance, or wing nut for tool-free release — in 2-set or 5-set packs. Pin-TORX bits are sold separately. Mix sizes in one checkout to qualify for free UK delivery on orders over £20.

Typical uses

Public-facing fixtures and signage, electrical and AV panels, playground and outdoor equipment, computer hardware, vending machines, vehicle accessory mounting, and any installation where tamper resistance is needed without specifying an expensive security fastener system.

How to fit

Use a pin-in TORX driver bit (sized to match the head — typically TX10H for M3, TX25H for M5 and so on) in a 1/4-inch hex bit holder or impact driver. Pass the bolt through the workpiece with one washer at the head, fit the second washer and nut on the back side, and drive home. Nyloc nuts give vibration-resistant retention; wing nuts allow occasional service access.

Delivery

Same-day dispatch on orders placed before 2pm — free UK delivery on orders over £20.