Metallics JTS144SS Anchors 1/4 X 4 Wedge Ancr SS (Jar 50)

A 1/4 inch wedge anchor sets in a 1/4 inch carbide bit hole drilled with a hammer drill. Wedge anchor hole diameter always matches the anchor diameter, which is what lets the clip expand against the concrete when the nut is tightened. Drill the hole deeper than the embedment you need so dust has somewhere to go, then blow it clean before driving the anchor.

Wedge anchors are a solid concrete fastener. They need a solid, uncracked base to expand against, so poured concrete is the right substrate. In hollow block, brick, or grout joints the clip has nothing to bite and the anchor will spin or pull. For hollow block use a sleeve anchor or a toggle; for the face shell of a brick wall use a screw anchor rated for masonry.

The SS in JTS144SS means stainless, which is what you want for exterior anchoring, wet locations, pool and water treatment rooms, coastal work, or anywhere a zinc plated anchor would bleed rust down the face of the concrete. Indoors and dry, plated carbon steel is normally sufficient. Pair stainless anchors with stainless nuts and washers so you are not setting up a dissimilar metal problem at the fastener.

The 4 inch length on the JTS144SS gives you a lot of grip range, which is useful for anchoring thicker material like a base plate, a sleeper, or strut with standoffs. For a thin item such as a single strut channel or a conduit clamp directly on the slab, 4 inches leaves excess thread standing above the nut and wastes embedment depth, so a shorter 1/4 inch anchor is the cleaner choice there.

No. A wedge anchor is a one time, mechanical expansion fastener; once the clip has set against the concrete it cannot be backed out intact. You can remove the nut and the fixture, then either drive the anchor below the surface and patch, or cut it flush. Plan hole locations before setting, and if you expect to move the equipment use a threaded insert or a drop in anchor instead.

The JTS144SS comes 50 to a jar, which covers a typical day of overhead strut or trapeze work where you are setting two anchors per support. The jar pack keeps the anchors with their nuts and washers together on the cart rather than loose in a bucket. For a large multi-floor rack install, plan on more than one jar.

Order Metallics JTS144SS. That is the manufacturer part number for the 1/4 x 4 inch stainless steel wedge anchor supplied 50 per jar, and it is the only configuration under that number, so there is no length or finish option to specify with it.