Disc Spring, Belleville Spring Washer, Stainless Steel, Finish Plain, Min. Inside Dia. 0.63 In, Max. Outside Dia. 1.25 In, Thickness 0.051 In, Overall Height 0.087 In, Load at Deflection 353 Lbs., Deflection at Load 0.018 In, Calculated Load at Flat 582 Lbs., Package Quantity 10