Used on ejection seat system. f/a-18 hornet aircraft. 3b all ends thread class weapon system essential anodize surface treated swivel, wrenching facilities each end unjf all ends thread series
3b 1st end thread class 16 1st end thread quantity per inch black polytetrafluoroethylene coated to a distance of 0.365 in. min, 0.390 in. max into id of second end, and on outside, except for 0.250 in. band located 1.195 in. from band center to second end unj 1st end thread series
2a 2nd end thread class 17 2nd end thread quantity per inch 2.000 in. od bulkhead flange w/three 0.177 in. dia mtg holes equally spaced on 1.600 in. dia bolt circle, flange located 0.740 in. from second end unf 1st end thread series
