Disc Spring, Belleville, High Carbon Steel, Min Inside Dia 0.406 In, Max Outside Dia 1.000 In, Thickness 0.105 In, Overall Height 0.118 In, Load 1830 Lbs, Deflection @ Load 0.010 In, Flat Load 1871 Lbs, Meets/Exceeds ASTM-A684, Package 12