Square Flat Head Tapping Screw

Tapping Screw Flat Square: A counter sunk head with a flat top surface and a cone-shaped bearing surface. Used in applications where protrusion of the fastener above the mating surface is unacceptable. Use a protrusion gage when measuring head height. Increases productivity with excellent torque transmission and resists cam-out. Distinctive appearance which discourages tinkering. *ZB - BLUE ZINC