I suppose it could be done with a split die in a lathe or vise as long as the die could be held square. I had one of my apprentices at work many years ago put a thread on some 3/8" rod with a hand diestock. He showed me the 9" of thread and I nearly died laughing, he had made the most drunken thread I had ever seen. From one side it looked like parallel rings and the other looked like a twin start.

Edited By old mart on 14/04/2022 22:49:35

Tracy Tools do a die for 1/4 whit LH

https://www.tracytools.com/taps-and-dies/left-hand-thread-taps-dies-bsw?product_id=1294

David

Hi, I made a left and right hand M8 brass threaded rod with split hand dies. I held the rod in my collet chuck on my mini lathe and started the die while putting a little pressure on the die itself to keep it square to the rod, with a blank end arbor in the tail stock and turning the chuck by hand, then once the full width of the die was on, the rod was supported with a revolving centre, the left hand thread is a little longer than the right hand one and is about 110mm long.

This is for my Swiss Boy 116 lab jack. Swiss Boy 116

Regards Nick.

Edited By Nicholas Farr on 15/04/2022 08:54:31

Try:

https://www.gwr-fasteners.co.uk/

They to an amazing range of studs and fasteners. I have purchased LH studding from them in the past.

Mike

I often use GWR for fixings I have needed (particularly imperial ones). Always had very good service.

But it might appear that (at times?) they source their items from other UK based manufacturers/suppliers as one order I received included an invitation to purchase from another source.

I would expect Peterborough bolts and nuts could source the threaded rod for me – at a cost, of course.🙂