Metallics JDIA381SS Anchors 3/8-16 Drop-In Ancr SS (Jar 100)

It's a stainless steel drop-in anchor. That's the reason to pick it over a plain carbon steel or zinc-plated drop-in: wet areas, exterior slabs, parking structures, coastal work, and food or wash-down environments where a plated anchor would bloom rust at the hole. Pair it with a stainless bolt or rod so you aren't mixing metals at the connection.

Drill the hole in cured concrete to the anchor's specified diameter and at least the anchor's embedment depth, blow or vacuum the dust out, drop the anchor in flush with the surface, then expand it with the matching setting tool driven by a hammer until the tool shoulders on the anchor. After that the 3/8-16 threads are ready to receive your bolt or rod. The setting tool is a separate item and is not included in the jar of 100.

No. A drop-in anchor like the JDIA381SS needs solid base material, normally poured concrete, because it works by expanding a shell against the walls of a drilled hole at a set embedment. In hollow block cells or drywall there's nothing for the shell to bear against. For hollow walls use a toggle or a sleeve-type hollow wall anchor instead, and for the face shell of block use an anchor rated for that material.

They're the standard overhead attachment for 3/8 inch threaded rod on electrical and mechanical work: trapeze supports, strut channel, cable tray hangers, conduit racks, light fixture drops, and junction box or panel mounting on concrete decks. Because the anchor is internally threaded and flush with the slab, the rod can be cut and re-hung later without re-drilling. The stainless version is the one to use where the deck is exposed to moisture.

No, the jar contains 100 anchors only. A drop-in anchor cannot be set without the matching 3/8 inch setting punch, so order one separately if you don't already have it in your kit. One tool sets the whole jar.

They ship 100 anchors to a jar. The jar pack is worth knowing about for stocking a service truck or a job box, since the anchors stay contained rather than loose in a bag. One jar covers 100 anchor points, so a trapeze or strut run hung on two anchors per hanger gets 50 hangers out of a single jar.

Order Metallics JDIA381SS. That number covers the 3/8-16 stainless steel drop-in anchor supplied 100 to a jar, and it is the only configuration under that part number, so there is no finish or length to specify alongside it.