Used on mrap - common nsn - mrap no permanent wsdc identified and 2 other weapon systems. 2a nut thread thread class right-hand nut thread 1.150" stud thread thread length 3.730 mils overall length 11 stud thread thread quantity per inch nut end shoulder tapers 45 deg.min phosphate surface treated unc stud thread thread series
2a nut thread thread class right-hand nut thread 0.300" nut thread thread length 6.310" overall length 14 stud thread thread quantity per inch stud end grooved 0.192 in. min 0.194 in. max w full length nickel surface treated unf nut thread thread series
3a nut thread thread class right-hand nut thread 0.940" stud thread thread length 4.750" overall length 16 stud thread thread quantity per inch dye shank area blue, threads to be free of dye recessed unjf nut thread thread series
2a nut thread thread class 0.300" stud thread thread length 4.040" overall length 18 stud thread thread quantity per inch slot in stud end unc nut thread thread series