3 & ASME B1. Size: #8-32 X 1-3/4 inchRound Head, Phillips/Slotted Combination DriveUse with nuts or pre-threaded holes of the same diameter & thread sizeOften used in machinery & appliancesNuts and washers not includedThread Type: Coarse, Thread Class: UNC-2A, Point Style: BluntSpecification(s) Met: ASME B18.6.1.
Lock Nut, 3/8"-16, Steel, Zinc Plated, 50 PK Size: 3/8 inch-16Hex nut with a built in free spinning external tooth lock washerTeeth on lock washer help to lock nut into placeScrews onto a bolt, cap screw or threaded rod of the same thread sizeAlso known as a kep nutThread Type: Coarse, Thread Class: UNC-2BSpecification(s) Met: ASME B1. The teeth on the lock washer can bite into the surface and help lock the nut into place.