TRUSS HEAD/Self tapping, Stainless steel, 4R, 1/4 4RX1/4THA pack of 100

These truss head screws are self-tapping screws and machined from cadmium-plated stainless steel.
 

This truss head Phillips tapping screw (Alternate Part# 4RX1/4THA) is made from cadmium stainless steel, has a 1/4-inch length, and a #4 thread size.