Disc Spring Belleville 302 Stainless Steel Min Inside Dia 0.317 In Max Outside Dia 0.937 In Thickness 0.045 In Overall Height 0.067 In Load 213 Lbs Deflection @ Load 0.011 In Flat Load 395 Lbs Meets/Exceeds ASI 302 and Government AMS Type 302 Package 12