ARP 300-8392 3/8"-24 12-Point Nut - 10 Piece Description: 3/8-24, 1/2 socket, .645 flange OD, 12pt nut kit Pkg: 10 Pkg Type: skin Material_1: 8740 chrome moly Finish_1: black oxide Material_2: N/A Finish_2: N/A Origin: USA Category: Bulk Fasteners Product Line: Nut Kit Type: Nut