There are many different ways to secure fixtures to a drywall-covered wall. Most of the ones we’ve seen involve anchors or long screws that go straight through drywall and into a supporting wood stud. And – as mentioned in comments section – you could always use lag bolts as well.
Veritas’ Drywall Nuts are a little different. Drywall Nuts are special stainless steel inserts that provide a very secure means by which to support heavier fixtures to a drywall-covered wall. To use them, you drill a pilot hole into the drywall, and drive the nut directly into a wood stud.
If you install a Drywall Nut properly, it won’t crush the drywall when a load is applied. It also sits proud of the drywall surface a little bit to help ensure that the nut carries the load and not the drywall.
Drywall Nuts are threaded to accept 1/4-20 or 5/16-18 machine screws. There’s a handy chart on the Lee Valley product page that shows the dimensions of the 5 different nut sizes.
The load capacity is as you would expect for beefy fasteners of this size – 350 lbs tension and 450 or 700 lbs shear, depending on 1/4″ or 5/16″ thread size. Lee Valley clarifies the shear and tension ratings by saying:
The shear load capacity refers to a weight hanging close to the wall, such as a large painting or other heavy, flat object. Tension load capacity refers to the amount of force required to pull a drywall nut out of a wall, whether from a direct pull or leverage from a shelf or other projecting object.
In other words, if you’re mounting anything where the main force component is downward along the wall, these insert nuts can support a maximum of 450 or 700 lbs each. It’s of course not going to be very practical to load them up that much. If these are the failure ratings, you’ll want to maintain a 4-to-1 safety ratio and not exceed 1/4 of the maximum load rating. 350 lbs is the pullout rating. Certain (most) fixtures will apply both tension and shear loads on the nuts.
These seem like a very effective and tidy way to mount all kinds of things to drywall-covered studs.
Price: $4.70 for 1, $4.00 each for 5 or more
Buy Now(via Lee Valley)