Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.531 In, Max Outside Dia 1.250 In, Thickness 0.078 In, Overall Height 0.103 In, Load 940 Lbs, Deflection @ Load 0.020 In, Flat Load 62 Lbs, Meets/Exceeds ASI 302 and Government AMS Type 302, Package 6