Metallics DEA34 Anchors 3/4-10" Dbl Exp Zn-al(Box 20)

The DEA34 is a 3/4-10 double expansion anchor, so it accepts a 3/4 inch bolt with 10 threads per inch, the standard UNC coarse thread for that diameter. You supply the bolt or threaded rod separately; the anchor body is the internally threaded shield that sets in the concrete.

Twenty pieces per box. The DEA34 ships as a box quantity of 20 double expansion anchors, which is the usual pack for mounting a run of strut, trapeze hangers, or equipment bases where you need several set points per job.

Zinc alloy construction (the Zn-al in the part description). Zinc alloy double expansion shields are intended for dry to normally damp interior concrete, such as mechanical rooms, parking structure soffits, and equipment pads. For continuous wet, exterior, or corrosive exposure, specify a stainless anchor instead.

A double expansion anchor like the DEA34 expands along its full length from both halves of the shield as the bolt is drawn up, which spreads the load and makes it more forgiving in lower strength, older, or slightly soft concrete and block. A single expansion shield grips only at the base, which is fine in sound, high strength concrete. If you are anchoring into questionable masonry or an older slab, the double expansion is the safer pick.

Yes. The box of 20 DEA34 anchors is the shields only. Order 3/4-10 bolts or threaded rod, plus washers, to match your fixture thickness. Figure the bolt length as the embedment into the anchor plus the thickness of whatever you are fastening down.

Yes, in the sense that matters on a service call. The DEA34 is an internally threaded 3/4-10 shield that sets in a drilled hole, so the bolt can be backed out and the fixture removed or replaced without destroying the anchor. That is the main reason crews choose a threaded expansion shield over a wedge anchor for equipment that gets pulled for service.