Disc Spring Belleville 302 Stainless Steel Min Inside Dia 0.093 In Max Outside Dia 0.187 In Thickness 0.010 In Overall Height 0.015 In Load 15 Lbs Deflection @ Load 0.003 In Flat Load 18 286 Lbs Meets/Exceeds ASI 302 and Government AMS Type 302 Package 12