On Wed, 15 Sep 2004 20:22:20 -0700, Ned Simmons wrote
(in message ):

In article 0001HW.BD6E4B66041FF38F01E89600
@nntp.velocitus.net, says...

Is is actually necessary that the 11/16 tube be threaded?
Could you get away with threading the OD of a sleeve with
an 11/16 ID and slipping it over the tube? Weld, Loctite,
or pin to fasten it.

Ned Simmons

Excellent suggestion! My undying thanks.