A previous owner has bodged whatever fasteners are supposed to secure the LH footrest. I believe the parts numbers are 40-4807, 40-4811 & 40-4810. I can't find them stocked anywhere in the UK.
Can anyone provide details of bolt size and thread? All I know is it's LH thread.
Thanks
https://www.bsaunitsingles.com/item.wws?sku=40-4807
what I would do is scale up so diameter is around the 7/16 diameter then you can work out lengths.
I would suspect BSC left hand threads.
https://www.bsaunitsingles.com/item.wws?sku=40-4810 the nut
Thanks Chaz,
A great site and much appreciated info. It's certainly given me a place to start. Guess I'll have to brush up on my LH thread cutting which will be ok for the stud and nut but the hole in the footrest is toatlly mullered and bell-mouthed.
The footrest was held on by a caphead in the side of the footrest dimpled into the taper. Maybe I'll LH one end of the stud, right hand thread the end that goes in the frame as I can dril and tap then studlock the thread in. It will look right that way.
Reason its left hand is so it does not un do when stood on it. Otherwise our jobs would be easier, that website and Baxter's in America normally have good pics and often sizes which allows me to make parts up. Ebay often have left hand tooling from old workshops.
Thanks Chaz,
Yes, I appreciate the reasons why it is left handed but don't have a LH tap to rethread the frame. The footrest pulls up pretty firmly on the taper too and should bite in its own right.
I also appreciate it is a best practice engineering solution, however, Loctite Stud lock and thread locker (anti vibration) weren't around 60 years ago. A Nyloc nut should also stop it becoming loose.
Just a thought and many thanks again for your help.