2a nut thread thread class right-hand nut thread 0.463" stud thread thread length 1.010" overall length 20 stud thread thread quantity per inch stud end thds must be tapered 0.002-0.003 per in. on root dia cadmium surface treated unc stud thread thread series
3a nut thread thread class right-hand nut thread 0.750" nut thread thread length 2.750" overall length 24 nut thread thread quantity per inch 0.2819 in. min pitch dia first thread, 0.2839 in. max pitch dia first two threads cadmium surface treated unf nut thread thread series