Description SECTION CONICAL NUT #12-24 THREAD 7/32 SICKLE BOLT LOCKNUT 100 PCS. This item is a suitable alternative for the following: 491-SB4, 830289D, 904-502, 904-502K, 904502, 904502K, FAS120, N83-0289D, 491-904502, 491-830289D, 2740904502, 135626