right-hand nut thread 0.490" stud thread thread length 1.340" overall length 18 stud thread thread quantity per inch 0.060 in. to 0.066 in. dia hole thru longitudinal axis of stud unc stud thread thread series
2a nut thread thread class right-hand nut thread 0.625" stud thread thread length 3.562" overall length 16 stud thread thread quantity per inch concentric extension on stud end 0.062 in. long by 0.281 in. dia included in length of thread unf nut thread thread series
3a nut thread thread class right-hand nut thread 0.500" nut thread thread length 1.500" overall length 18 stud thread thread quantity per inch concentric extension on stud end 0.062 in. long by 0.281 in. dia included in length of thread unf nut thread thread series
3a nut thread thread class right-hand nut thread 1.125" nut thread thread length 8.625" overall length 10 stud thread thread quantity per inch air relief groove 0.031 in. w by 2.187 in. lg to bottom of thread on stud end thread only unc stud thread thread series