21-7D2 4121-7D2N 7/8-14UNF 4121-7C2 4121-7C2N No. 6-32UNC 4121-61 4121-61N 7/16-28UNEF 4121-7D3 4121-7D3N 7/8-16UN 4121-7C516 4121-7C516N No. 8-32UNC 4121-81 4121-81N 1/2-13UNC 4121-1A1 4121-1A1N 1-8UNC 4121-2A1 4121-2A1N No. 10-32UNF 4121-102 4121-102N 1/2-20UNF 4121-1A2 4121-1A2N 1-12UNF 4121-2A2 4121-2A2N No. 12-24UNC 4121-121 4121-121N 1/2-28UNEF 4121-1A3 4121-1A3N 1-14UNS 4121-2A514 4121-2A51
