Thomas & Betts AFS-1 1/2 IN,1G-FS BOX,ALUM,D-END,1 HOLE

The AFS-1 is a single-gang FS box with one 1/2 inch hub, dead-end style, so conduit enters from one side only. If you need a run to pass through the box, a dead-end body won't do it; you'd want a through-feed FS body with hubs on opposite ends.

Die cast aluminum. That matters on two counts: it's a conductive enclosure, so the box itself carries the equipment grounding path when used with threaded metal conduit, and aluminum is the usual choice where you want corrosion resistance without the weight of malleable iron. If the job calls for a nonmetallic box, the Kraloy FSED050710 is a PVC FSE-series 1-gang deep box instead.

The AFS-1 is a single-gang FS box made of die cast aluminum with a dead-end body, 1/2 inch hub and one hub opening. The Kraloy FSED050710 is a 1-gang deep FSE box molded in PVC. So the choice comes down to a metallic raceway box versus a nonmetallic one: aluminum takes threaded rigid or IMC conduit and provides a metal enclosure, while the PVC FSE body is used with PVC conduit systems and solvent-welded or threaded PVC fittings. The Kraloy is also a deep body, giving more interior volume than a standard-depth single-gang FS box.

Yes, it takes FS/FD-style single-gang covers, not standard drywall plates. FS and FD boxes use their own cover family (blank, single receptacle, duplex, toggle switch), and those covers include the gasket when the location is wet. Order the cover separately, by device type; the box ships as a body only.

That is what an FS body is for. Cast FS and FD boxes have integral mounting feet and threaded conduit hubs so they bolt to a wall, ceiling, strut, or column with the raceway running on the surface. There is no need for a bracket or mud ring. The AFS-1 is the 1-gang, 1/2 inch, dead-end version of that body.

The Kraloy FSED050710 is a PVC 1-gang deep FSE-series gang box, so it's the nonmetallic counterpart in the deep (FD-depth) body rather than the shallow FS. Use PVC where you want no metal at all in the enclosure; the Thomas & Betts AFS-1 stays the pick where you're running threaded metal conduit and want the box in the ground path.

Yes, that's exactly its use. One gang, one device, fed by a single 1/2 inch conduit run terminating at the box. Pair it with the matching FS single-gang cover for whatever device you're mounting. If the opening needs two devices side by side, you need a 2-gang FS body instead.

Both styles mount a single device in an exposed raceway run, so the device and cover prep are comparable. The deciding factor is the conduit system and the enclosure material. If the run is threaded rigid or IMC metal conduit, the die cast aluminum AFS-1 with its 1/2 inch threaded hub is the matching box. If the run is PVC conduit, the Kraloy FSED050710 1-gang deep FSE box in PVC keeps the system nonmetallic and avoids transition fittings and bonding at the box. Mixing the two is possible with adapters, but it adds fittings to the job.

The AFS-1 is a standard single-gang FS body in die cast aluminum with one 1/2 inch hub, which suits a single device fed from one direction with normal conductor fill. Where the device is bulky or the splices are crowded, the Kraloy FSED050710 is a deep 1-gang FSE box and gives a deeper cavity behind the device, though it is a PVC body intended for PVC conduit rather than a metallic raceway.

The die cast aluminum body is conductive, so with threaded rigid or IMC conduit the box is bonded through the hub. Devices still need to be grounded per your method, and if you're pulling an equipment grounding conductor you'll need a means to terminate it inside the box. One point worth flagging: aluminum and copper in direct contact can corrode, so use a listed grounding screw or lug suited to the box material.

They are closely related but not interchangeable in every run. The AFS-1 is a die cast aluminum FS-style box, a threaded-hub metallic device box for rigid and IMC conduit. The Kraloy FSED050710 is an FSE series box in PVC, the nonmetallic equivalent family used with PVC conduit. Covers and device mounting follow the same general FS pattern, but hub threading, body material, and the fittings you land on them differ, so confirm which raceway system the opening is wired in before substituting one for the other.