Disc Spring, Belleville, 302 Stainless Steel, Min Inside Dia 0.380 In, Max Outside Dia 0.750 In, Thickness 0.034 In, Overall Height 0.055 In, Load 169 Lbs, Deflection @ Load 0.011 In, Flat Load 282 Lbs, Meets/Exceeds ASI 302 and Government AMS Type...