Used on australian government. 3a stud thread thread class 0.500" stud thread thread length 1.375" overall length 18 stud thread thread quantity per inch item has opposite side thread series designator of nf, with diameter OF0.312", threads per inch of 24, cadmium surface treated unc stud thread thread series
2a stud thread thread class right-hand stud thread 2.625" overall length 24 stud thread thread quantity per inch navy special project unc stud thread thread series
2a stud thread thread class right-hand stud thread 2.000" overall length 24 stud thread thread quantity per inch navy special project unc stud thread thread series
right-hand stud thread 1.000" stud thread thread length 2.500" overall length 20 stud thread thread quantity per inch clamping stud black oxide finish; 100, 000psi min yield; used with t nut or installed into a fixture plate oxide surface treated unf stud thread thread series