Where can I find some 4-40 left threaded nuts? I need them for the H9 titanium push rods.
Thanks

Mcmaster Carr or Grainger has them.

Ok, I looked on Mcmaster, but didn't see them. I must have missed it. I will look again.
Thanks

try Grainger
http://www.grainger.com/Grainger/wwg...headSearch.y=8

Yeah, I looked too.

The smallest they offer for left hand threads is 6-32.

Shouldnt really need them... The H9 rods are turnbuckle type; left hand on once side and right on the other. If you nut lock the right hand side, the rod cant turn! No real need to do both ends.

Good point

Graham,

Just out of curiosity, what type of clevis are you using on each end of the H-9 push rods? The question does have a purpose behind it in relation to your question regarding 4/40 left hand threaded nuts.

I am using metal ball links on both ends for the elevator rods on a SM Hawk. I just want to make sure the turnbuckle doesn't move.

OK,
While the 4/40 lock nut would be the the proper fix to jam the clevis and take any play out of the threads... but is not readily available, why not after setting the initial length of the push rod just solder the left hand threaded clevis or locktite it using the permanent green locktite. After the initial length is set, only small adjustments should be required which can be done from the right hand threaded clevis. I love the H-9 titanium rods, but always hated the fact that one side is left hand thread.

Ya, I think I will just use locktite on the LF side and just use a Nylock on the RT side.
Thanks

Nuts are pretty easy to make.

[link=http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=1736886&PMT4NO=101419707]4-40 left hand tap[/link]
[link=http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=8250556&PMT4NO=101419744]3/16 Hex Stock[/link] Lifetime supply of nuts.

You will also need a #43 (.089 Dia) drill available at any hardware store.

If you do not have a lathe for cutting the stock, you can use a file, and hacksaw in a drill press.