Disc Spring, Belleville Spring Washer, Stainless Steel, Finish Plain, Min. Inside Dia. 0.505 In, Max. Outside Dia. 1 In, Thickness 0.05 In, Overall Height 0.075 In, Load at Deflection 340 Lbs., Deflection at Load 0.013 In, Calculated Load at Flat 600 Lbs., Package Quantity 10