Disc Spring Belleville 302 Stainless Steel Min Inside Dia 0.190 In Max Outside Dia 0.375 In Thickness 0.020 In Overall Height 0.030 In Load 60 Lbs Deflection @ Load 0.005 In Flat Load 110 Lbs Meets/Exceeds ASI 302 and Government AMS Type 302 Package 12