Used on deck instl. 3b thread class right-hand 28 thread quantity per inch dome nut, self locking, corner, side-by-side rivet holes, floating spacer 160 ksi, 800 degrees f the two drilled holes are 0.098 in (min) silver nut surface treated
Used on plate, instl. 3b thread class right-hand 32 thread quantity per inch dome nut, self locking, corner, side-by-side rivet holes, floating spacer 160 ksi silver nut surface treated