RaceQuip offers various hardware pieces for auto racing seat belt and racecar harness installation. All RaceQuip seat belt mounting hardware is forged from premium quality SAE 1050 steel, then cadmium plated for corrosion resistance. This 7/16-20 long eyebolt kit includes a large backup washer and retaining nut because it is designed for through chassis or through floor installation. The length of the shank underneath the head is 1 7/8″ and the thread size is 7/16-20. These eyebolts allow racecar seat belt mounting utilizing snap hook ends (700030 or 700040) for quick release installation. Use a backup plate (700070) for installation through a sheet metal floor. Sold each.