Metallics LCS3485 Anchors 3/4 x 8-1/2 Hx Hd Lg Dia CS St-zn (Box 5)

The LCS3485 is zinc plated carbon steel, which is a corrosion coating for dry interior and sheltered conditions. For a coastal site, a pool deck, a wet process area, or anything in standing water or de-icing salt, carbon steel with zinc will corrode and you want a stainless anchor instead. Covered garages, interior slabs, and equipment pads are where this one belongs.

No. A 3/4 inch hex head large diameter anchor in this style is for solid base material, meaning poured concrete or solid masonry. Hollow CMU, brick veneer, and any board material will not develop the hold this anchor needs, and in hollow block the sleeve can expand into the void and spin. Use a toggle or a screen tube and adhesive for hollow walls.

Large diameter hex head anchors of this style are drilled at the anchor's nominal diameter, so a 3/4 inch anchor takes a 3/4 inch carbide bit in concrete. Drill deeper than your intended embedment to leave room for dust, then clean the hole before setting. The LCS3485 is 8-1/2 inches overall, so subtract your fixture thickness to work out how much of that length is actually going into the concrete.

Order Metallics LCS3485. That is the manufacturer part number for the 3/4 x 8-1/2 inch hex head large diameter carbon steel zinc anchor, sold in a 5 piece box. It is the only configuration under that number, so there is no length or finish option to specify.

The hex head on the LCS3485 means you set it with a socket or an impact wrench rather than a screwdriver, and the head bears directly on the fixture, so no separate nut or washer is part of the drive. Keep clearance above the fixture for the socket, which matters on 3/4 inch hardware where the socket body is substantial.

At 5 anchors per box, 40 points means 8 boxes with nothing spare. Large diameter anchors get wasted to misdrilled or spalled holes more often than small ones, so most crews order a box or two over the count on a 3/4 inch setting job.