This is for the loco that Hornby made which had square axle centers.
KATO M Car Gear Wheel Silver Shaft Short No Tire Disc Brake
KATO Shinkansen Tire Gear Wheel Silver Long 8 Pieces
HORNBY X8199 GEAR, THOMAS THE TANK ENGINE WHEELS X8873 COUPLING RODS+ HEX BOLTS
NUTSPINNER FOR 12BA NUTS AS USED ON HORNBY VALVE GEAR EXPO 78032