Used on aircraft application; truck,4x4,m520,m553,m559 and m877. 3a all ends thread class 12 all ends thread quantity per inch cadmium surface treated unj all ends thread series
Used on bridge erection boat,aluminum,24 ft. 2a 2nd end thread class 18 1st end thread quantity per inch supports anthony modle mlt 6-2; nsn 3930003271575 unf 2nd end thread series
3a 2nd end thread class 0.060 in. dia hole thru both sides of boss end connection, 0.160 in. distance from end to hole center unf 2nd end thread series