Norton Part Numbers
Early Norton part numbers were typically 5 digits long, sometimes preceded by NM, NMT, or NME
Most part numbers are now 6 digits – frequently beginning with 04 or 06, and followed by 4 digits. Norton part numbers on our website do not include the (-) like the Triumph and BSA numbers. We have tried to update all of the early numbers on the site with the updated part number.
If desired, there is a “Supersession and Amended Part Number List” available as part number 005753.