Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.505 In, Max Outside Dia 1.000 In, Thickness 0.035 In, Overall Height 0.067 In, Load 174 Lbs, Deflection @ Load 0.051 In, Flat Load 260 Lbs, Meets/Exceeds ASI 302 and Government AMS Type...