Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.125 In, Max Outside Dia 0.250 In, Thickness 0.013 In, Overall Height 0.020 In, Load 24 Lbs, Deflection @ Load 0.003 In, Flat Load 48 Lbs, Meets/Exceeds ASI 302 and Government AMS Type 302, Package 12