2a nut thread thread class right-hand nut thread 0.188" nut thread thread length 3.125" overall length 20 stud thread thread quantity per inch unthreaded portion 0.296 in. lg 0.125 in. dia on stud end passivate surface treated stepped unc nut thread thread series
2a stud thread thread class right-hand nut thread 0.580" nut thread thread length 1.580" overall length 14 stud thread thread quantity per inch stud end thds must be tapered 0.002-0.003 per in. on root dia cadmium surface treated stepped unc stud thread thread series