Shaft Replacement Couplings PFS-500 Filters Sort results Reset Apply Shaft Core OD (mm/inch)Model No.Price7.9 mm or 5/16"Tool Coupling TC-500$ 6+ 7.9 mm or 5/16"Case Coupling CC-500$ 9+ 7.9 mm or 5/16"Manifold Cap MC-500$ 16+ 7.9 mm or 5/16"Shaft Washer 7/16 x3/4$ 1+ 7.9 mm or 5/16"Drive Coupling DC-500$ 3+ 7.9 mm or 5/16"Nylon Guard NG-500$ 19+