Used on w/s: main feed pumps; engine, aircraft tf33-pw-102 (c-135e, ec-135h/k/p); aircraft, c-18a, ec-18b; aircraft, (ac-130h, mc-130h, ec-130e, hc-130); support equipment, b-1 aircraft; gun, 5-in./54 cal, mk-42 & 45; helicopter, mh-53e; ssbn mk-118 fire control sys; deep submergenc systems programs (dssp). 1.000" center hole diameter