meter socket back to back to breaker panel

[SCWOOD]

I have a ? What do I put from box to box in the knock out.There will be 7/16 OSB between them.Please give pic or description I will not no just by name only.Thanks for any help!

 

[Gooch]

close ****** or maybe a 2" ******.

 

[Norcal]

I have a ? What do I put from box to box in the knock out.There will be 7/16 OSB between them.Please give pic or description I will not no just by name only.Thanks for any help!

A ****** w/ double locknuts & grounding bushings, if there was a way to use PVC male adaptors one could omit the bonding bushings, a plastic anti-short bushing is required on any fitting w/ 4 AWG conductors & larger even on PVC, the grounding bushing will meet the requirements for a bushing on a metallic ******.Just to attempt to clarify....

http://www.garvinindustries.com/Electrical-Fittings/Rigid-IMC-Fittings/Grounding-Bushings--Threaded