Thomas & Betts GALB-2 LB-Style Conduit Box Cover, 3/4 In, Aluminum Die Cast

The GALB-2 is the cover, not the body. It is a surface/box cover in the LB style for 3/4 inch, die cast aluminum. If you need the elbow fitting itself with the threaded hubs, you want an LB conduit body; the GALB-2 is what closes it up.

They are built from different materials and for different trade sizes. The GALB-2 is a die cast aluminum LB-style conduit box cover for 3/4 inch conduit. The Arlington 935NM is a non-metallic LB-style conduit body in the AnyBODY series, sized 2 inch and threadless. Choose the GALB-2 when you need a metallic aluminum part on 3/4 inch runs; the 935NM suits larger 2 inch non-metallic work where a threadless connection is wanted.

Mixing metals is the thing to watch. The GALB-2 cover is die cast aluminum, so pairing it with an aluminum LB body of the same 3/4 inch size keeps the dissimilar-metal issue out of the picture. On a damp or exterior wall penetration, galvanic corrosion between aluminum and ferrous bodies is the usual reason a cover seizes on later.

It depends on the raceway system you are running. The Thomas & Betts GALB-2 is die cast aluminum, which pairs with metallic conduit systems and keeps the LB assembly all metal. The Arlington 935NM is a non-metallic LB-style body, which matches PVC and other non-metallic raceway. Trade size also drives the decision: the GALB-2 serves 3/4 inch, while the 935NM is a 2 inch threadless part.

On a wall penetration the body stays threaded into the conduit, so when the cover is corroded, painted shut, or the screws are stripped, swapping just the cover gets the pull point back in service without breaking the raceway. For a 3/4 inch aluminum LB, GALB-2 is that replacement piece.