Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.505 In, Max Outside Dia 1.500 In, Thickness 0.070 In, Overall Height 0.104 In, Load 483 Lbs, Deflection @ Load 0.017 In, Flat Load 896 Lbs, Meets/Exceeds ASI 302 and Government AMS Type 302, Package 6