Round Washer and Truss Washer Tapping Screws are self-tapping screws. The round washer screw head has a rounded center with an integral washer extending out. A modified round washer head is flat on top. A truss washer head screw has a low rounded head with integral washer extending out. They're used in automotive applications for attaching metal parts, plastic trim, or panels, providing a large bearing surface and low-profile finish. Finish: Zinc & Yellow & Bi-Wax Sealer.
