For me, and us on the other side of the Atlantic, imperial sizes is a great mysterium, and we do not understand it at all.

With best regards

Tomas Larsson

Borås

Sweden

Från: [email protected] <[email protected]> För [email protected]
Skickat: den 25 november 2022 20:36
Till: [email protected]
Kopia: [email protected]
Ämne: Re: [GreenKeys] Weird hardware size

I believe you will find your answer here:

https://grandbrass.zendesk.com/hc/en-us/articles/201711490-What-is-IPS-and-Why-Do-We-Use-These-Size-Threads-for-Lighting-Parts-

Tom Tillson

---------- Original Message ----------
From: Nick England <[email protected]>
To: Greenkeys <[email protected]>
Subject: [GreenKeys] Weird hardware size
Date: Fri, 25 Nov 2022 14:21:27 -0500

Well, Teletype is kind of weird in using 5-40 and 6-40 where most folks would use 6-32. 

And using 1/4-32 instead of 1/4-28. 

But who in the world decided on 1/4-27 for lampshade finials? Where did *that* come from?

--

Nick England K4NYW
www.navy-radio.com