3a nut thread thread class right-hand nut thread 0.440" stud thread thread length 0.980" overall length 20 stud thread thread quantity per inch navy special project dia of unthreaded portion 0.179 in. min, 0.183 in. max oxide surface treated unc stud thread thread series
3a nut thread thread class right-hand nut thread 0.500" nut thread thread length 1.600" overall length 20 stud thread thread quantity per inch navy special project dia of unthreaded portion 0.179 in. min, 0.183 in. max cadmium surface treated unc stud thread thread series
3a nut thread thread class right-hand nut thread 1.000" nut thread thread length 7.688" overall length 11 stud thread thread quantity per inch counterbore 0.375 in. dia by 0.062in. deep unc stud thread thread series