Disc Spring, Belleville, High Carbon Steel, Min Inside Dia 0.656 In, Max Outside Dia 1.875 In, Thickness 0.057 In, Overall Height 0.115 In, Load 410 Lbs, Deflection @ Load 0.046 In, Flat Load 3210 Lbs, Meets/Exceeds ASTM-A684, Package 6