2a nut thread thread class right-hand nut thread 0.438" stud thread thread length 2.250" overall length 16 nut thread thread quantity per inch 0.312 in. flats 0.375 in. lg 0.625 in. from one end unc nut thread thread series
2a nut thread thread class left-hand stud thread 0.562" stud thread thread length 1.625" overall length 16 nut thread thread quantity per inch w/wrenching flats 0.375 in. l on stud center unc nut thread thread series