Jim, normally I would use rings.

This one as a matter of fact.

[Linked Image from erico.com]

This one acepts 3/4" EMT.

Job specs called for boxes, the engineer knows best. [Linked Image]

Of course at the office cubicle Data drop locations the plans called for a 2" EMT into a 2 gang box. [Linked Image]

The Data contractor is doing fine with these and they are certifing the work. [Linked Image]

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts