2a thread class right-hand 1.375" thread length hexagon head style 18 thread quantity per inch 2nd reply for min tensile strength, 64000 psi cadmium or zinc surface treated unf thread series
2a thread class right-hand 1.375" thread length hexagon head style 18 thread quantity per inch 2nd reply for min tensile strength, 64000 cadmium or zinc surface treated unf thread series