[Public-list] Bronze NPS thread pipe cap source?

[Rachel]

Howdy Albergers,

I've got a few through-hulls that are backed with either gate valves or 
ball valves that don't overly please me.  Some of the obvious "keepers" 
(such as the cockpit drains), I will replace with real seacocks, but as 
for the others, I'd love to be able to just cap them off right now (I 
will not use them but don't want to remove them and glass them over 
until I've had a chance to "live with it" for awhile to see what I want 
to do).

In searching the archives for "thu hull," I notice that a couple of 
people (Mike Lehman and also the owner of "Strayaway Child," I happen 
to remember) mentioned getting bronze pipe caps and capping off the 
through-hulls.  This would be the *perfect* solution for some of mine 
right now; but search as I might, I simply *cannot* find NPS threaded 
bronze pipe caps.  I can find them with NPT threads till they're coming 
out my ears, but of course those don't match the NPS of through hulls, 
and so will only engage a scary few threads at the very top.

I've tried McMaster Carr, Hamilton Marine, Port Supply/West, Jamestown, 
and probably a few others that I can't recall at the moment.  In one 
web search I found a large gas-pipe company that had NPS bronze caps, 
but only in 2" size, alas.

I'd be very grateful to know where anyone found the proper caps!

Thank you,

Rachel
1967 Alberg 30, #221