3a nut thread thread class right-hand nut thread 0.500" stud thread thread length 1.250" overall length 20 stud thread thread quantity per inch stud end min first thread cadmium surface treated uns stud thread thread series
2a nut thread thread class right-hand nut thread 0.625" stud thread thread length 8.062" overall length 24 nut thread thread quantity per inch chamfer 45.0 deg to minor dia both ends passivate surface treated unc nut thread thread series
3a nut thread thread class right-hand nut thread 1.125" nut thread thread length 2.375" overall length 13 stud thread thread quantity per inch first end has 1/2 in.radius oval end; second end has 45 deg chamfer 1/16 in.aprox lg unc nut thread thread series