Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.531 In, Max Outside Dia 1.000 In, Thickness 0.089 In, Overall Height 0.100 In, Load 1070 Lbs, Deflection @ Load 0.009 In, Flat Load 27 Lbs, Meets/Exceeds ASI 302 and Government AMS Type 302, Package 12