Used on w/s: l.p. compressors; aircraft (ac-130h, mc-130h, ec-130e, hc-130); engine, aircraft tf33-pw-102 (c-135e, ec-135h/k/p); radar set an/tpn-18; fire control system, missile mk 74 (fcs); engine, aircraft tf33-p-3/5/9 (c/ec-135, b-52h); fire control system, mk 92 (fcs); air compressors, high pressure; main feed pumps. 0.171" center hole diameter