B-Line Eaton series fastener hardware and accessories, Suitable for solid and hollow core materials, Zinc plated, 3/8" x 4",Sleeve type expansion anch

Both. The ASA-50-400HN is rated for solid and hollow core materials, which is the main reason to pick a sleeve anchor over a wedge anchor: the expanding sleeve spreads load along the hole, so it works in hollow CMU and brick as well as poured concrete. A wedge anchor expands at a single point and is a solid concrete fastener only.

Yes, the ASA-50-400HN carries a UL Listed certification, which is what inspectors look for when anchors are supporting raceway, strut, cable tray or fixture hangers. That makes it usable on electrical installations where unlisted hardware would get flagged.

The ASA-50-400HN is zinc plated. Zinc plating handles interior dampness such as mechanical rooms, parking structures under cover, and unconditioned warehouse space. For direct weather exposure, submersion, or a chemically aggressive environment, step up to a hot dip galvanized or stainless sleeve anchor instead.

It's the hex nut version, so the nut is part of the assembly and no separate fastener is needed to set it. You drop the anchor through the fixture hole into the drilled hole and tighten the nut, which draws the cone and expands the sleeve against the base material.

With a 4 inch overall length on a 1/2 inch anchor, the usable grip is whatever is left after your embedment into the base material. Sleeve anchors are through-fastened, meaning the hole in the item you are mounting has to be drilled the same 1/2 inch nominal as the anchor body so the sleeve passes through it. Thick strut brackets, channel, or double-layer standoffs are where this 4 inch length earns its place over a shorter 1/2 x 2-1/4 or 1/2 x 3 anchor.