3a nut thread thread class right-hand 0.500" stud thread thread length 2.740" overall length 20 stud thread thread quantity per inch navy special project unf nut thread thread series
3a nut thread thread class right-hand nut thread 0.325" nut thread thread length 1.331" overall length 32 nut thread thread quantity per inch hex 0.080 in. by 0.125 in. deep nut end cadmium surface treated unjf nut thread thread series