Used on aircraft application. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch anodize surface treated unj 1st end bulkhead thread series
2a thread class right-hand 0.235" thread length 0.625" overall length paint under side of hex head in accordance w/mil spec mil-p-15128 formula 5nb hexagon, external thread, inverted flare
3a all ends thread class 0.972" overall length 12 all ends thread quantity per inch passivate body surface treated male coupling half un all ends thread series
Used on road grader,huber model f1500m,k-c list. right-hand external machine wrapped w/polytetrafluoroethylene tape plug, magnetic npt external thread series
2b all ends thread class 1.562" overall length 8 all ends thread quantity per inch cadmium body surface treated male coupling half un all ends thread series