MF,
a few years ago I needed a piece made up to fit an alternator to an Enfield motorcycle. When I was asked what the thread was I said I had no idea. Mate said it didn't matter he could cut it but he was curious as to what it was. He couldn't wait to tell me that it was a Villiers thread and Enfield in India continued to use that thread on the alternator nut till that engine was discontinued in 2008
