Description:

Size: 1/4 inch-20 X 1-1/4 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. Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt. Specification(s) Met: ASME B18.2.1, ASME B18.6.3, and ASME B1.1.