3a thread class right-hand 0.4370" thread length 1.8000" overall length 20 thread quantity per inch od crowned on a 10 in. radius; 10 pct molybdenum disulfide lubricant, 81755, fms-0169; NAS516-1 lubrication fitting in stud end chromium outer ring surface treated cam follower unf thread series
Used on tank,full tracked,m1 with improved armor;tank,full tracked,m1a1;tank,full tracked,xm1. 1.0800" overall length 22c solid, external flange one end