Tamper-Proof Screw

A tamper-proof screw is a fastener with a drive that needs a special tool to turn it. It is used where access should be restricted to authorised people.

A tamper-proof screw has a head that needs a special driver, so it resists removal by ordinary tools. It suits access panels, fittings and equipment where casual opening is unwanted. It matches a nut, a tapped hole, or a captive thread of the same size, and the driver must match the head.

This kind of screw is often made in stainless steel or steel with a plating. The material affects corrosion resistance and cost.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance and check the drive recess and thread on receipt. Confirm the dimensions and material grade against the order.