3a nut thread thread class right-hand nut thread 1.000" nut thread thread length 2.340" overall length 16 stud thread thread quantity per inch min first thread any max first two threads have pitch dia of 0.3401 in. min, 0.3421 in. max pitch dia on stud end cadmium surface treated unc stud thread thread series
3a nut thread thread class right-hand nut thread 1.000" nut thread thread length 2.500" overall length 13 stud thread thread quantity per inch heat to 1500 to 1600 deg f unc stud thread thread series