I just came to a realization! The reason I haven't read listing or labelling on a lot of materials is that I buy only what I need for the job, I'm so small-time that I rarely buy boxes or cases of anything... I don't have a 3/8" connector box, just a bunch of loose ones!
That explains a lot!
Anyway, yep, the other connectors agree with trade sizes...
[This message has been edited by sparky66wv (edited 05-09-2001).]
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI
The reason that they are called 3/8 is because back in the days before romex, when there was only BX and greenfield the BX came in 3/8", 1/2" 3/4 and so on, each requiring a seperate connector. However the 1/2 ko was suitable for both the smaller sizes, so it's threads and locknuts were used. Then the connectors evolved so that one connector could handle both 3/8 and 1/2 sizes. It's not so noticeable with bx anymore, but with greenfield there is an obvious difference between the sizes.