PrimeLine 9090608 Serrated Flange Bolts 14 inch20 X 12 inch Zinc Plated Case Hardened Steel 25pack

Size: 1/4 inch-20 X 1/2 inch, Hex bolt with a serrated circular flange under the head, Flange eliminates need for separate washer, Serrations bite into surface and can help to prevent loosening, Designed for use with a nut (not included) or a threaded hole of the same diameter and thread size