Norton Exhaust Nut/Finned Clip/Cooling Fin/Clamp early Type
ID 1 5/8" = 43 mm
Outer diameter at thread: 49mm
500, 600 650 cc Dominator
750 cc Atlas
750 cc Comm
Early 850 cc Comm.
please look at all pictures
Norton Centre Stand early models
Mounting Holes Diameter: 17mm
Norton Commando pre 1971
Please see measurements in pictures
before engine no.: 141783
Paint not perfect