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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. Button Head screws are typically used for general purposes with a lower crown & shallower recess than round head screws.

4-40 x 1/4&quot; Security Machine Screw - Button Hex Socket Head - Alloy Steel - Black Oxide - 100 Pk

4-40-x-1-4-security-machine-screw-button-hex-socket-head-alloy-steel-black-oxide-100-pk

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