1/2 x .016 NAS1149 Military Flat Washer 18-8 Stainless Steel DFAR HHWS17HC The 4-40 x 1/4 Slotted

The 4-40 x 1/4 Slotted Round Machine Screw Fully Threaded Black Oxide is a small

The black phosphate coating offers corrosion resistance and durability

The Phillips pan head has a raised circular section in the center that provides a bearing surface for the screwdriver

allowing it to be easily positioned and welded onto metal surfaces

1/2 x .016 NAS1149 Military Flat Washer 18-8 Stainless Steel DFAR HHWS17HC The 4-40 x 1/4 SlottedThe 1 2 x . 016 NAS1149 Military Flat Washer is a thin, round metal disc with a hole in the center. It is made of 18 8 stainless steel, which is corrosion resistant and durable. The washer has a diameter of 1 2 inch and a thickness of . 016 inch. It is used to distribute the load of a screw or bolt over a larger area, preventing damage to the material being fastened. The washer meets the requirements of the National Aerospace Standard (NAS) 1149 and