Disc Spring Wave Spring Stainless Steel Finish Plain Min Inside Dia 20.2mm Max Outside Dia 28.0mm Thickness 0.41mm Overall Height 2.8mm 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