Used on c-5 acft. 1.6700" overall length inside diameter is countersunk onboth sides, 100 degrees by 3.080 diameter; used on towbar 17c solid, plain, no outside flanges
1.625 by 0.375 in. thk; 0.250 in. thk shoulder w/0.125 in. thk by 0.625dia. shank; three mtg holes, 0.156 in. dia., 120 deg. apart nickel surface treated