What is the thread for the steering wheel nut.

[ajmac]

Standard BSP is a straight thread too, it seals on a copper or dowty washer rather than on the threads like NPT.

[Paul Dutton]

Originally Posted by ajmac

Standard BSP is a straight thread too, it seals on a copper or dowty washer rather than on the threads like NPT.

Or WD seal.

[Stew Robertson]

That is the point I was making pipe thread is Tapered the nut is not and the threads are a standard 29 1/2 degree thread at 16 tpi and can easily be turned on a lathe with the cap tig welded on so the thread can have the under under the cap
Clear as mud

[Stew Robertson]

hi Lynn I was taught from way back when you always set the compound rest at 29 1/2 to cut the standard Canadian thread but Canadians are always a little behind ,but not down under

[Lynn Eades]

Stew, that went straight over the top. I'll have to stand up next time. (the cricket people would say "it went straight through to the keeper")
I do have a small lathe, but powered thread cutting is not something that I can do on it. (I would figure it out if I had to) Obviously my skills in the machine shop, are not up with yours.
I do use it to get the die holder square.

[Jim Burrill]

Got a call from the machine shop. They matched the thread for the sample nut and also the clay impression I made of the spindal.

They say it is a UNF 3/4 16 60 degree.

That matches also what Lynn said.
They are cutting a chunk of steel for me to test fit and then machining the nut and the flange for me.

No idea of cost yet. I need it and they can do it, and I have been happy with the work they did drilling all the holes in the Humber Gun mantle.

SO, I am getting three made up. 1 for my Mk1, another for Lance's Mk2 that I somehow lost, and one spare.

If anyone is interested in the spare, let me know.

[Stew Robertson]

no comment