Disc Spring, Belleville Spring Washer, Carbon Steel, Finish Plain, Min. Inside Dia. 0.407 In, Max. Outside Dia. 0.875 In, Thickness 0.062 In, Overall Height 0.074 In, Load at Deflection 494 Lbs., Deflection at Load 0.01 In, Calculated Load at Flat 644 Lbs., Package Quantity 10