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Security fasteners provide an added level of security by their drive design that prevents removal with ordinary screw drivers. Maximum torque transfer & positive tool engagement means easier drive installation with less pressure & slippage. Requires matching driver bit. Round Head screws are widely used for general purposes, featuring a high crown with a deep recess and smaller diameter head than truss or pan heads.

4-40 x 1/2&quot; Security Machine Screw - Round One-Way Head - 18-8 Stainless Steel - FT - UNC - 100 Pk

4-40-x-1-2-security-machine-screw-round-one-way-head-18-8-stainless-steel-ft-unc-100-pk

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