Disc Spring, Belleville, High Carbon Steel, Min Inside Dia 0.531 In, Max Outside Dia 1.063 In, Thickness 0.090 In, Overall Height 0.106 In, Load 1370 Lbs, Deflection @ Load 0.013 In, Flat Load 896 Lbs, Meets/Exceeds ASTM-A684, Package 12