12-09-2024, 06:50 PM
(This post was last modified: 12-09-2024, 06:57 PM by Tony Griffiths.)
That's interesting because the replica ones supplied by Willie McKenzie (http://austinrepro.com/general) are BSW - but my '30 Chummy are 5/16 BSF. When the copies arrived, it was obvious that wouldn't fit, yet the barrels into which they screwed appeared to be the same as those from a '29 Chummy (apart from the thread, of course) and not something somebody had made (unless they had taken enormous care). Both threads work with the same efficiency so I suppose either would do if you are going to make your own wing nuts.