Disc Spring Wave Spring Stainless Steel Finish Plain Min Inside Dia 31.7mm Max Outside Dia 40.0mm Thickness 0.46mm Overall Height 5.1mm For Hole Size 0.1875 For Rod Size 5/16 in Load @ Deflection (Lbs.) NA Meets/Exceeds 17-7 PH Condition C CH-900 AMS-5529 Package Quantity 10