Disc Spring, Curved, High Carbon Steel, Min Inside Dia 0.395 In, Max Outside Dia 0.735 In, Thickness 0.016 In, Overall Height 0.086 In, For Hole Size 3/4 In, For Rod Size 3/8 In, Load 12 Lbs, Deflection @ Load 0.050 In, Meets/Exceeds ASTM-A684, Package Qty 10