Thomas & Betts Two-Screw Connector

Five trade sizes, each its own part number: 1 inch is 3304, 1-1/4 inch is 3305, 1-1/2 inch is 3306, 2 inch is 3307, and 2-1/2 inch is 3308. Order by the trade size of the cable or flexible conduit you are terminating, not by the knockout size in the box.

Go with the Appleton PXSS2K series flameproof compound barrier cable connector in nickel-plated brass. The Thomas & Betts two-screw connector is a standard metallic clamp-style cable connector sized 1 inch through 2-1/2 inch and does not provide a compound barrier, so it is the right choice for conventional cable terminations and not for a specified flameproof barrier termination.

No, they solve different problems. The Thomas & Betts two-screw connector is a metallic cable connector that clamps the cable with two screws and is offered in 1 inch, 1-1/4 inch, 1-1/2 inch, 2 inch and 2-1/2 inch trade sizes (part numbers 3304 through 3308). The Appleton PXSS2K series is a flameproof compound barrier cable connector in nickel-plated brass, intended for terminations where a sealing compound barrier is part of the termination. Use the two-screw connector for ordinary cable-to-box terminations and specify the PXSS2K family where a flameproof compound barrier termination is called for.

A two-screw cable connector clamps the cable or flex jacket with a saddle held by two screws and terminates it into a box or enclosure knockout, with a locknut on the inside. The two-screw saddle grips a larger range of cable diameters and gives more pull-out resistance than a single-screw clamp, which is why it is the common choice on the bigger trade sizes like 1-1/2, 2, and 2-1/2 inch.

Not one number, but one family. The same two-screw connector is offered in 1, 1-1/4, 1-1/2, 2, and 2-1/2 inch (3304, 3305, 3306, 3307, 3308), so a facility can keep a single connector style and finish across every larger run and stock five part numbers instead of mixing brands and clamp types on the same job.

The Thomas & Betts two-screw connector line runs 1 inch, 1-1/4 inch, 1-1/2 inch, 2 inch and 2-1/2 inch as part numbers 3304, 3305, 3306, 3307 and 3308, all in the same metallic two-screw clamp style, so one family covers that whole span with consistent installer technique. A second product only comes into play for a different termination type, such as the Appleton PXSS2K flameproof compound barrier connector.

Metal. The Thomas & Betts 3304 through 3308 connectors are supplied in a metallic finish, so they carry equipment ground continuity through the fitting body rather than relying on a separate bonding path through a nonmetallic housing.

Plan on checking what ships with the fitting before you open the box count. The product data for the 3304 to 3308 connectors describes the fitting itself (a two-screw cable connector in a metallic finish) and does not itemize loose hardware, so if your install needs insulating throat bushings or extra locknuts, add them to the order as separate line items.