Disc Spring Belleville 302 Stainless Steel Min Inside Dia 0.531 In Max Outside Dia 1.000 In Thickness 0.062 In Overall Height 0.085 In Load 770 Lbs Deflection @ Load 0.018 In Flat Load 9 Lbs Meets/Exceeds ASI 302 and Government AMS Type 302 Package 12