The item in this ad is a group of 13 vintage automotive OEM fastener, specifically designed to secure components onto the engine of a vehicle from around the mid 1960's to late 1970's. There are 7 ea. SAE grade 5 fasteners that have a flanged head; 1 is 1 inch in length, 2 are 1 1/8 inches in length, 2 are 1 1/4 inches in length, and 2 are 1 3/4 inches in length. There are 6 ea. grade 8 fasteners that are 1 1/4 inches in length that have a captured washer, and all the fasteners are a UNC 3/8 x 16 TPI, with the 6-point hex head at 9/16 inch. They are vintage and 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.