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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.

4-40 x 3/8&quot; Security Machine Screw - Flat Hex Socket Head - Alloy Steel - Black Oxide - FT - 100 Pk

4-40-x-3-8-security-machine-screw-flat-hex-socket-head-alloy-steel-black-oxide-ft-100-pk

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