Try here: http://www.mcmaster.com/#hex-locknuts/=5bcw46
Click on "Flex-top Expanding Lock Nuts" I have some T-1504 type cavities/duplexers, but not here so I can't measure the thread. --- Jeff WN3A > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of n...@no6b.com > Sent: Sunday, January 10, 2010 11:04 AM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Motorola T1504A Duplexer Lock Nut > > > > At 1/10/2010 06:34, you wrote: > >Hi, > > > >Does any one in the groups have on of these in their junk > box that they > >don't need? > > I'm missing a couple of those myself for the pass version of those > cavities. I would be interested if there's a > standard/plentiful source. > > Bob NO6B