Used on part of interior armor kit 2540-01-533-8813; nha nsn m915a3 armor kit 2540-01-523-1336; armored version of m915a3 2320-01-523-2486. 0.312" hole diameter cadmium surface treated
4.250" hole diameter 4.750" outside diameter 0.040" material thickness through cut 0.500 in. wide located at apex of one wave passivate surface treated