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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. Flat Head screws install flush with metal surfaces or countersinks with softer materials for a clean appearance.

5/16-18 x 3/4&quot; Security Machine Screw - Flat Hex Socket Head - Alloy Steel - Black Oxide - 100 Pk

5-16-18-x-3-4-security-machine-screw-flat-hex-socket-head-alloy-steel-black-oxide-100-pk

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