Split Lock Washer, Standard, A2 Stainless Steel, Fits Bolt Sizes M20, Inside Dia. 20.2mm, Outside Dia. 33.6mm, Thickness 4mm, Meets/Exceeds D127B, Package Quantity 5Specifications:Thickness: 4 mmOutside Dia.: 33.6 mmPackage Quantity: 5Inside Dia.: 20.2 mmItem: Split Lock WasherMeets/Exceeds: D127BFits Bolt Sizes: M20Type: StandardMaterial: A2 Stainless Steel