The Breakroom > The Water Cooler

1" x 20 tpi conduit thread ????

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Pete W.:

--- Quote from: 75Plus on January 28, 2014, 11:27:57 AM ---SNIP

As a side note, I know that we have several Ham Radio operators on the board and the antenna connectors for co-axial cable are UNEF threaded. I have however ran into some PL 259 connectors that were made with metric threads. They looked the same as 5/8-20 threads but would not thread onto the SO-239 socket.

--- End quote ---

Hi there, 75Plus,

I've just done a search for 'Amphenol SO239' and the best data sheet I found quotes 5/8" by 24 tpi UNEF.

I wrote 'just' but it was actually an hour ago - I was called to dinner and left this reply un-posted! 

In my Amateur Radio days, I often encountered pseudo PL259s and SO 239s of Far Eastern origin.  Their threads were 5/8" by 1 mm pitch, their bodies were die-cast from zinc alloy and plated.  I think the insulators were recycled washing-up bowls! 

Sometimes they would cross-mate with 'proper' PL259s and SO 239s and sometimes they wouldn't!

Fortunately, from dismantling many items from the war surplus market, I had built up a good stock of genuine Amphenol UHF connectors, real brass, silver-plated all over and with insulators of mica-loaded Bakelite. 

Chuck in E. TN:
For what it's worth, I grew up in the New York town where that Amphenol connector was made. My mother and father retired from that plsnt, and my youngest brother still works there.
I am also retired USAF and installed/repaired many of those connectors on aircraft, including safety wireing them.
Chuck

75Plus:

--- Quote from: Pete W. on January 28, 2014, 02:26:59 PM ---
I've just done a search for 'Amphenol SO239' and the best data sheet I found quotes 5/8" by 24 tpi UNEF.
 

--- End quote ---
Hi Pete I stand corrected. I was trusting a 79 YO memory and I have found that it can be dangerous.  :doh: I just went to the shop and looked at the tap and die that I have had in this thread for well over 20 years. 5/8-24 UNEF. One would think the specs would be burned into my brain as the info was laser ed into the tools!!

awemawson:
This is what the original question was all about:

A/ Amphenol don't make a converter to fix flexible conduit to the rear of these connectors

awemawson:
B/ Andrew Mawson does  :ddb:

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