Used on m1 tank family. 1.658" hole diameter 2.132" outside diameter 0.023" material thickness 33.0/43.0 lbs load at deflected height of 0.073 in. spring tension
0.210" hole diameter 0.750" outside diameter 0.060" material thickness the outside edge of the recessed side is chamfered, 0.03 in taper length by 45 deg angle; used on XM1 passivate surface treated recessed