Sorry to take so long to reply. I've been pretty busy and haven't had time
to follow the group.

It's a nut used in fixuring: a heavy flanged hex nut. (Yours does hava
a flange, doesn't it/) 3/8-16 threaded studs, clamp bars, and
stairstep blocks make up a standard fixturing kit with these nuts, and
the 11/16 wrench. Very useful if one owns, say, a Bridgeport milling
machine.

No, mine doesn't have a flange and Ned Simmons correctly named it as a
"heavy" hex nut as shown on page 3131 of the online McMaster-Carr catalog.

You'd like to replace the NUT or the WRENCH with the same thing,
rather than make one? It wasn't clear to me which you meant.

I want to replace the nut. The wrench fits several nuts on the lathe and I
normally keep it on the tailstock nut.

Best Regards,
Keith Marshall


"I'm not grown up enough to be so old!"