Disc Spring, Belleville, High Carbon Steel, Min Inside Dia 0.755 In, Max Outside Dia 1.500 In, Thickness 0.107 In, Overall Height 0.134 In, Load 1398 Lbs, Deflection @ Load 0.013 In, Flat Load 400 Lbs, Meets/Exceeds ASTM-A684, Package 12