Metallics JHW12434 Anchors 1/2 X 4-3/4 Hmmr Drv Wedge Zn-C (Jar 25)

Drill 1/2 inch. A wedge anchor's nominal diameter is the hole diameter, so the 1/2 x 4-3/4 inch JHW12434 goes into a 1/2 inch carbide-bit hole in concrete, drilled deeper than the embedment you need so the anchor has somewhere to seat.

It is zinc-plated carbon steel (the Zn-C in the description), which is a mild corrosion coating meant for dry interior concrete. For exterior, wet, or coastal work, specify a stainless or hot-dip galvanized wedge anchor instead of this one.

25 anchors per jar. The JHW12434 is packaged in a jar rather than a bulk box, which is the quantity most electrical contractors keep on the truck for strut, panel, and conduit-support work.

Yes, that is what the length is for. At 4-3/4 inches overall, the JHW12434 gives you enough shank to pass through a thick plate, strut base, or grout bed and still bury the expansion clip in the concrete. Total length has to cover fixture thickness plus nut and washer plus your embedment, so on thin material a shorter 1/2 inch anchor is the cheaper call.

A hammer-drive wedge anchor like the JHW12434 is driven into the drilled hole with a hammer, then tightening the nut pulls the cone against the expansion clip to wedge it in solid concrete. Use it for permanent, heavy anchorage in poured concrete: strut, equipment pads, panel backs, machine bases. For hollow block or brick use a sleeve anchor instead; for a flush, removable connection where you want to bolt and unbolt the fixture, use an internally threaded drop-in anchor.

Wedge anchors of this type ship as a complete assembly, with the nut and washer already on the threaded end so you drive the anchor and then torque the nut. No separate hardware to order with the 1/2 x 4-3/4 anchors.

JHW12434 is the Metallics manufacturer part number for the 1/2 inch by 4-3/4 inch hammer-drive wedge anchor, zinc-plated, jar of 25. That is the number to quote on a purchase order or a distributor cross-reference.