This ad is a group of 28 used vintage automotive OEM fasteners, specifically designed to secure components onto the chassis and engine of a vehicle from around the mid 1960's to late 1970's. There are 17ea grade 5 fasteners that are a UNC 5/16" X18 TPI, 7ea have a captured lock washer and 10ea have a flanged head. There are 4ea 3/8 X 16 TPI. The one that is 2 inches long has a captured flat washer, and the 2 short ones have a flanged head and were used as GM Torque Converter bolts. There are 7ea that are a UNC with 7/16" X 13 TPI that are 5/8" long, 4ea have flanged heads, 2ea have captured flat washers and the short 1/2" long fastener has a captured lock washer. They are vintage OEM fasteners with an "E" or "EL" branding, are made in the United States, and have a black oxide surface finish. These fasteners are not modified and comes with a free return warranty. Although it is designed for a specific chassis, it is a rare find for collectors and enthusiasts and will also work for fixes that are not as extensive or technical as automotive repair.