Disc Spring, Curved, 301 Stainless Steel, Min Inside Dia 0.525 In, Max Outside Dia 0.980 In, Thickness 0.018 In, Overall Height 0.131 In, For Hole Size 1 In, For Rod Size 1/2 In, Load 11.1 Lbs, Deflection @ Load 0.045 In, Meets/Exceeds AISI Type 302, Package 10