As an Amazon Associate, we earn from qualifying purchases. Home » GATES » N5. GATES . N5. The Gates N 5. QD N Bushing has a bore size of 5 inches. GATES . N5. Attributes Brand name, Manufacturer name, ManufacturerGATES Distributor offers SellerSKUMOQIn stockMultiplePrices RadwellN5.1-211 @ $680.50