This ad is for 25 vintage automotive OEM fasteners specifically designed for the chassis of a vehicle from around the mid 1960's to late 1970's. The SAE grade 5 fasteners include 7ea UNC 1/4" x 20 TPI, 11ea UNC 5.16 X 18 TPI, and 7ea UNC 3/8" X 16 TPI. The 1/4-inch fasteners have large flat washers and two of those are captured lock washers. The 5/16 inch are six that have flanged heads while four of those have large flat captured washers, and the short one has a captured lock washer. The 3/8 inch fasteners have captured washers, most of which are lock washers. The 1/2" long 3/8" fastener has a flanged head and is a torque converter bolt. They are made in the United States and have a black oxide surface finish. These fasteners are not modified and come with a free return warranty. Although they are designed for a specific chassis, they are a rare find for collectors and enthusiasts and will also work for fixes that are not as extensive or technical as automotive repair.