2a 1st end thread class 12 1st end thread quantity per inch synthetic rubber buna n seals cadmium follower ring surface treated single joint, elbow design npsm 2nd end thread series
Used on len fire fighting equipment. 4 2nd end bolt hole quantity mounting bracket 4.625 in. sq; 4 mtg holes; 3.188 in. c to c of holes; 0.438 dia of unthd holes npt 1st end thread series