5/16 x .016 NAS1149 Military Flat Washer 18-8 Stainless Steel DFAR HTF 10-9 x 3 Square Drive

10-9 x 3 Square Drive Round Washer Head Deep Thread Wood Screw 2/3 Thread Zinc:

which means they can be driven directly into the material without the need for a pilot hole

It is made of zinc-plated steel and has teeth on the inside diameter that bite into the surface of the bolt or nut

The slotted hex head provides a secure grip for easy driving

5/16 x .016 NAS1149 Military Flat Washer 18-8 Stainless Steel DFAR HTF 10-9 x 3 Square DriveThe 5 16 x . 016 NAS1149 Military Flat Washer is a thin, circular piece of 18 8 stainless steel used to distribute the load of a fastener and prevent damage to the surface of the material being fastened. It has an outer diameter of 5 16 inches and a thickness of . 016 inches. The washer meets the specifications of NAS1149, a military standard for aerospace fasteners, and is DFAR compliant, meaning it is manufactured in accordance with the Defense