Flat Washer, For Screw Size #12 ,18-8 Stainless Steel 100 PK SAE flat washers are machined to a tighter specification and have a smaller outside diameter.
.Sheet Metal Screw, #10 x 1-1/2 in, Painted 18-8 Stainless Steel Pan Head Phillips Drive, 100 PK A sheet metal screw has sharp threads that cut into a material such as sheet metal, plastic, wood, hard rubber, aluminum, and other comparable compositions.