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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.

5/16-18 x 3&quot; Security Machine Screw - Round One-Way Head - Steel - Zinc - FT - UNC - USA - 100 Pk

5-16-18-x-3-security-machine-screw-round-one-way-head-steel-zinc-ft-unc-100-pk

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