Disc Spring, Curved, High Carbon Steel, Min Inside Dia 0.395 In, Max Outside Dia 0.735 In, Thickness 0.011 In, Overall Height 0.129 In, For Hole Size 3/4 In, For Rod Size 3/8 In, Load 6 Lbs, Deflection @ Load 0.073 In, Meets/Exceeds ASTM-A684, Package 10