Metallics JNA142SS Anchors 1/4 X 2 Hmmr Nail-In Ancr SS (Jar 100)

The JNA142SS is a 1/4 by 2 inch hammer-drive nail-in anchor, stainless steel, packed 100 to a jar. Order quantity is by the jar, so a single order line gives you 100 anchors for repetitive fastening runs.

Stainless construction is the reason to pick the JNA142SS over a zinc-plated nail-in. It's the version electricians use for exterior strut, conduit clamps, and ground bar mounting on damp walls, loading docks, parking structures and coastal work where a plated anchor would bleed rust onto the finish.

Drill a 1/4 inch hole in the concrete, block or brick to at least the embedment you need, hold your fixture against the surface, drop the anchor through the fixture hole into the masonry, and drive the pin flush with a hammer. The pin expands the body against the hole wall. No wrench, no setting tool. It's a permanent fastening, so plan on cutting or grinding the head off if you ever need to remove it.

The 2 inch overall length is the anchor body, not the usable grip. Subtract the thickness of whatever you are mounting from that 2 inches to get your embedment in the masonry. For thin items like a one-hole conduit strap or a box tab the 2 inch body leaves plenty in the concrete; through a thick bracket or a layer of sheathing you lose that much embedment, and a longer anchor is the better call.

Go nail-in when the fastening is permanent and you have a lot of them to set, a hammer is faster than a driver and there's no thread to strip. Choose a masonry screw anchor instead if you may need to remove or relocate the fixture, or if you're fastening into older, softer concrete where you want to back the fastener out and reset it. The JNA142SS covers the first case in stainless at 1/4 by 2 inches.