Metallics JTS3312SSD Anchors 3/8 x 3-1/2 Wdg SS (Jar 100)

A 3/8 inch carbide bit. Wedge anchors are drilled with a bit matching the anchor's nominal diameter, so the 3/8 x 3-1/2 inch JTS3312SSD goes into a 3/8 inch hole. Drill the hole deeper than the intended embedment so dust has somewhere to go, clean it out, then drive the anchor through the fixture and tighten the nut to expand the clip.

Yes. The JTS3312SSD is a stainless steel wedge anchor, which is what you want for exterior concrete, wash-down areas, pool decks, coastal work and anywhere a zinc-plated anchor would rust and stain the slab. Anchoring exterior strut, equipment pads and light pole bases are typical uses.

Wedge anchors like the JTS3312SSD are for solid, cured concrete. They work by expanding a clip against the hole wall, so hollow block, brick and mortar joints can blow out or fail to grip. In hollow masonry use a sleeve anchor or a screen tube with adhesive instead.

Total anchor length is 3-1/2 inches, and that length has to cover embedment into the concrete plus the thickness of whatever you are fastening plus the nut and washer. Wedge anchors of this diameter need a few inches in the concrete to develop their hold, so plan on the 3-1/2 inch length suiting thin fixtures like strut channel, base plates and angle brackets. For thicker standoffs or grout beds, step up to a longer 3/8 inch anchor.

That is exactly the use. These are electrical-trade fasteners, and a 3/8 inch stainless wedge anchor is the common choice for securing strut channel, trapeze hangers, panelboard backboards and conduit support brackets to concrete walls, slabs and ceilings. The stainless body keeps it serviceable in damp mechanical rooms and outdoor runs.

No. Once the nut is tightened the clip is permanently expanded against the concrete, so a wedge anchor cannot be backed out and reused. The usual fix is to cut or drive the stud below the surface, patch, and set a new anchor nearby. If you need a removable fastener, use a threaded insert or a female drop-in anchor instead.

100 anchors per jar. That is the standard count for this item, so a single order covers a run of strut hangers, equipment pads or panel backboards without piecing together small boxes. Nut and washer are assembled on each anchor as supplied.