Thomas & Betts 2631 1/2 IN. CHASE CONNECTOR INS'D

A 1/2 inch trade size fitting like the T&B 2631 lands in a standard 1/2 inch knockout, which is 7/8 inch in diameter. Most 4-square and handy boxes come with 1/2 inch knockouts already, so no punching is normally needed.

Both are straight cord grip connectors, but they differ in trade size and body material. The Thomas & Betts 2631 is a 1/2 inch insulated chase connector with a steel body. The Bridgeport Fittings RSR-2106 is an aluminum cord grip connector with a 3/4 inch NPT thread. If the enclosure hub or knockout on your job is 1/2 inch, the 2631 is the matching size; a 3/4 inch opening calls for the RSR-2106.

The Thomas & Betts 2631 is built for 1/2 inch, so it will not thread into a 3/4 inch NPT hub. For that opening, the Bridgeport Fittings RSR-2106 cord grip connector is threaded 3/4 inch NPT. Confirm the cable outside diameter falls inside the grip range before you commit, since stepping up a trade size usually means a larger cord as well.

Yes, the 2631 is an insulated fitting. The insulated throat is what lets you pull conductors through without the cut edge of the fitting shaving insulation, and it is the version most inspectors want to see where conductors terminate.

Depends where it sits. The T&B 2631 is steel, which takes impact and over-torquing better, a good pick for machine rooms, shops and anywhere the fitting can get knocked. The Bridgeport RSR-2106 is aluminum, lighter and non-ferrous, which some specs call for around corrosive or wash-down areas. Sizes differ too: the 2631 is 1/2 inch, the RSR-2106 is 3/4 inch NPT.

It can. The Thomas & Betts 2631 chase connector has a steel body, while the Bridgeport Fittings RSR-2106 cord grip connector is aluminum. Contractors and MRO buyers standardizing a facility often keep the connector body consistent with the raceway and enclosure metal already in place rather than mixing dissimilar metals at a connection point, so match the one that fits what the rest of the run is built from.