3a thread class right-hand 0.720" thread length oval head style 20 thread quantity per inch flat point, 0.280 in. length, 0.410 in. min unf thread series
3a nut thread thread class right-hand nut thread 0.688" stud thread thread length 1.750" overall length 13 stud thread thread quantity per inch 0.062 in. by 45 drg chamfer on end w/O688 in. by 45 deg. chamfer on end w/0.750 in. thd unf nut thread thread series