Metallics JTS103D Anchors 1/4 X 3-1/4 Wedge Ancr St-zn U (Jar 100)

No. Wedge anchors are for solid poured concrete only. They work by expanding a wedge clip against the wall of a drilled hole, which needs solid base material to grip. For hollow CMU, use a sleeve anchor or a toggle; for drywall, a toggle or self-drilling anchor. The JTS103D is the solid concrete option.

One hundred anchors per jar. It ships as a jar pack, which is the usual way a contractor buys a single diameter and length for repetitive work like strut, conduit clamp, or equipment base anchoring.

The 3-1/4 inch overall length is split between what goes into the concrete and what sticks out to clamp your fixture. Subtract the thickness of the material being fastened plus the nut and washer from 3-1/4 inches, and the remainder is your embedment. That long length is why this one suits thicker fixtures, strut, or standoff plates rather than a thin bracket, where a shorter 1/4 inch anchor would be easier to set.

It is a concrete anchor stocked for electrical work: hanging unistrut and trapeze supports, conduit clamps and straps, panel and enclosure backplates, and light fixture or equipment bases on concrete decks and walls. The 1/4 inch diameter covers the lighter end of that work.

Metallics part number JTS103D, the 1/4 by 3-1/4 inch zinc plated steel wedge anchor sold 100 to a jar. Use that number when matching a reorder so you get the same length rather than a shorter 1/4 inch anchor.