![Square Flat Head Tapping Screw](http://www.sterlinghardware.com/cdn/shop/products/00601_450_ea8b0581-e818-43d5-8865-752712818564_{width}x.jpg?v=1575439625)
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