3b 1st end thread class oblong flange 0.250 in. from one end with two 0.190 in. dia. holes on 1.560 in. dia. bolt circle anodize surface treated unjf 1st end thread series
Used on hawk missile mim-23 and sikorsky cargo transport helicoper ch-54a,ch-54b. 3b all ends thread class anodize surface treated unjf all ends thread series
Used on f/a-18 hornet aircraft. 3b all ends thread class 12 all ends thread quantity per inch weapon system essential cadmium surface treated un all ends thread series
