Metallics JDIA38SS Anchors 3/8-16 Drop-In Ancr SS (Jar 50)

Yes. A drop-in anchor is not a wedge or sleeve type you tighten down with the bolt. You drill the hole, blow it clean, drop the anchor in, then expand the internal plug with a matched 3/8 inch setting punch before threading in your rod. Without the setting tool the anchor is not expanded and carries almost no load. Buy or confirm you have the setting tool sized for 3/8 inch drop-ins.

Stainless steel body, which is why contractors pick it over the plain zinc version for parking structures, exterior slabs, pool decks, food plants, and other wet or washdown areas. Where corrosion is not a concern, a carbon steel drop-in of the same 3/8-16 size does the same mechanical job.

It is the concrete anchor behind overhead work: threaded rod for strut and trapeze supports, cable tray hangers, conduit hangers, and junction box or panel mounting off a poured deck. Because the anchor is flush and internally threaded, the rod can be removed later and the anchor stays usable in the slab, which is why it gets specified over a wedge anchor where fixtures may be reworked.

Drop-in like the 3/8-16 JDIA38SS sets flush with the concrete surface and leaves a female thread, so nothing protrudes and you can thread rod in, take it out, and put it back. A wedge anchor is a stud that sticks up out of the slab permanently and cannot be removed. Pick the drop-in for overhead threaded rod and anything you may need to detach; pick a wedge anchor for a bolted baseplate you never intend to move.

Fifty anchors per jar, packed in a jar rather than a box, which is the format most electrical and mechanical contractors keep on the truck for rod hanging. Order quantity is in jars of 50, so a job needing 200 anchors takes four.

Metallics part number JDIA38SS. The J prefix denotes the jar pack, DIA the drop-in anchor, 38 the 3/8 inch thread size, and SS the stainless steel material. That is the number to quote for reorders so you do not end up with the carbon steel equivalent.