Disc Spring Belleville 302 Stainless Steel Min Inside Dia 0.265 In Max Outside Dia 0.687 In Thickness 0.052 In Overall Height 0.069 In Load 620 Lbs Deflection @ Load 0.014 In Flat Load 884 Lbs Meets/Exceeds ASI 302 and Government AMS Type 302 Package 12