In woodworking there is a specialty screw for every task. And, not surprisingly, when woodworkers reach for the best cabinet screws for installing cabinets there are specialty screws for the job.
Why won’t standard drywall screws work?
Well, the proper screws to install cabinets require:
- Stay-on square drive or Torx heads
- Shear strength rating (sorry, drywall screws)
- Large heads to distribute weight
- Self-tapping threads to avoid splitting the studs
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Best cabinet to wall:
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Warning: Installing cabinets is a high risk project that could involve injury or damage. If you aren’t sure, hire a kitchen professional to do the job for you.
Types of Cabinet Screws
If drywall screws aren’t acceptable for installing cabinets, then what do professionals use?
Well, a variety of screws is the best answer. Since cabinet to cabinet, cabinet to wall and cabinet box design all come into play there is no single screw.
For a standard kitchen cabinet install you’ll want to have the following on hand:
- ~100 cabinet to wall screws
- ~100 cabinet to cabinet screws
- For face frame cabinets, ~100 trim head screws
Cabinet to Wall Screws
The heaviest duty cabinet screw is the one that will take the load of the cabinet and its contents. Which makes choosing a screw designed for the weight of cabinets a must.
Features to look for:
- Aggressive thread for a firm “bite” into the wood.
- Self-tapping design to penetrate wood without splitting it
- Large flat head for holding power
- Shear strength to hold the weight
- Proper screw length (installers: beware of utilities in the wall)
For this style of screw both FastCap and GRK make a screw specially designed for the job.
Cabinet to Cabinet Screws (Face Frame)
For connecting face frame cabinets together the challenge is always aligning the face of the frames and then removing any gaps.
While you can install screws behind the frame, connecting the face frames creates a stronger connection.
So why trim head screws? Well, as the name implies they have a very small head that will disappear in the edge of the face frame. For installation be sure to use a cabinet claw.
Cabinet to Cabinet Screws (Frameless or Face Frame)
As you likely know, connecting the cabinet sides together is a must to hide any gaps between the cabinet sides or face frames.
And, not surprisingly, there are a few custom screws and methods that will let you achieve the best results. In fact, there are three types of screws you’ll want to use depending on the construction of your cabinets.
Cabinet to Cabinet Post Screws (Frameless)
Post screws have a male and female side that connect from either side of the two cabinets. It’s common to install these in the top and bottom shelf pin holes to blend them in them.
Tip: while a tight installation usually works, some installers will use Loctite to make these screws hold extremely tight (removable, but essentially locked).
Connecting Cabinet Frames with Trim Head Screws
After your first cabinet is installed and the second one is balanced in the air, hopefully on a cabinet jack, you’ll want to use a cabinet claw to secure the frame.
Then, using an extra long 1/8″ drill bit (4-5″ or more) you’ll drill a long hole using the guide bushing on the cabinet claw complete through the first face frame and partially into the next.
Last, you’ll install a trim head screw, like the GRK, at least 1/2″ into the adjacent cabinet or filler strip.
By using a trim head screw directly in the face frame you’ll have maximum control over the grip of the frame. While a cabinet-to-cabinet screw behind the frame can work, it won’t have the same holding power.
Cabinet Hardware Screws
It’s surprising to some that you’d even need to consider this type of screw.
After all, the cabinet hardware you just purchased should have came with the right screws. Right?
Unfortunately, I’ve had bad luck with being able to use all the screws (both wood and machine screws) that come with cabinet hardware.
Stock up on machine screws for drawers
After the cabinets are screwed to the wall you’ll likely end up drilling cabinet knob hardware and installing knobs and handles.
And guess what?
There are specific screws for this job as well. After hacking and cutting many machine screws I’ve learned to always have a box or two of 8-32 x 1-1/4 inch and 8-32 x 1-5/8 machine screws in your toolbox.
Why? Because most custom cabinet fronts are 3/4″, drawer sides are 5/8″ and knobs needing about 1/4″ of screw length a 1-5/8″ machine screw can make the installation smoother. And hardware manufacturers just don’t supply what you’ll need.
Installing drawer slides requires buying your own cabinet screw
Installing drawers requires a mix of skill and the right Rok #8 screws
In fact, as I found in our guide to the best soft close drawer slides, beyond inadequate drawer slide screws some manufacturers just plain send the wrong screws.
Lastly, for face frame cabinets you will almost certainly need screws in the frame. And almost all hardwoods will require a pilot hole, best done with a self centering pilot hole bit, to avoid splitting the wood (or worse – breaking the screw). But for the record, I rarely drill pilot holes in softwoods.
Cabinet Assembly Screws
While most traditional plywood and face frame constructed cabinets are glued and nailed there are uses for cabinet screws in construction.
Cabinet screws to join melamine and particle board
If you’ve ever assembled IKEA furniture you’ll know what this is about. And, personally, I think their systems for connecting furniture and cabinets is ingenious.
But I still prefer to build plywood cabinets.
So how do you join melamine (aka particleboard) at right angles? With a confirmat head screw, as pictured below:
What is a confirmat screw? A confirmat screw is a special cabinet screw that leverages a large thread design suited to particleboard cores and a recessed flat head that can be concealed.
However, to use this type of screw you’ll need to invest in a specialty confirmat countersink.f
Frequently Asked Questions for Cabinet Screws
How long are screws to attach cabinets to the wall?
While wall construction determines the length most screws are a minimum of 2-1/2″ up to 3-1/2″.
What screws are used to connect cabinets together?
There are three types of screws for connecting cabinets together. Face frame cabinets utilize trim-head screws drilled through the frames. While frameless cabinets use either shorter screws or Chicago bolts to connect the cabinet.
How many screws do I need to install cabinets?
For wall screws plan for 4 wall screws per foot of cabinet and then four screws per cabinet box for connecting cabinets together.
Three Cabinet Screws to Avoid
So I promised three screws you should avoid.
And here they are:
- Drywall screws are NOT to be used for installing cabinets. Please, just don’t do it.
- Drawer manufacturer screws shouldn’t be counted on – instead buy an appropriate length Rok #8 screw used. And to be clear, I’ll only use manufacturer screws in face frame connection points. Otherwise, what they send just won’t hold up to years of weight and slamming.
- Deck/outdoor screws (see #1)
Summary: Cabinet Screws
Hopefully this article was helpful in understanding the subtle differences in screws you’ll need while building and installing cabinets. While not the most exciting purchase, a good assortment of cabinet screws will make an installation go smoother.
And prevent need for future adjustments caused by the wrong screw.
Cabinet Installation Series
Planning & Tools To Install Cabinets
Guides for Cabinet Installation
Finishing Cabinets With Molding and Hardware
Last update on 2022-09-24 at 23:12 / Images from Amazon