Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.630 In, Max Outside Dia 1.250 In, Thickness 0.040 In, Overall Height 0.082 In, Load 234 Lbs, Deflection @ Load 0.021 In, Flat Load 67 Lbs, Meets/Exceeds ASI 302 and Government AMS Type 302, Package 6