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