ikea kallax screw size

IKEA Kallax Screw Size: Find the Perfect Fit

By John LewisFebruary 28, 2026

When it comes to furniture assembly, IKEA's KALLAX series is a fan favorite for its versatility and functionality. But to make the most of your KALLAX unit, you need to ensure you're using the correct screws. So, what's the KALLAX screw size, and how do you know which ones to use? Let's dive into the details.

First, it's essential to understand that IKEA uses a standardized screw size for most of their furniture, including the KALLAX series. This consistency makes assembly easier and ensures you have the right screws on hand for future repairs or modifications.

Understanding IKEA Screw Sizes

The majority of IKEA furniture, including the KALLAX, uses a 3x16mm screw. This size is suitable for most assembly tasks and can be used for both the sides and the back of the unit.

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However, for the KALLAX's shelves and doors, you might need a slightly different size. Let's explore the specific screw sizes for these components.

Screws for KALLAX Shelves

The KALLAX shelves use a 4x16mm screw. This slightly longer screw is necessary to accommodate the thicker shelf material and ensure a secure fit. It's crucial to use the correct length to prevent the screw from sticking out or damaging the shelf.

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Here's a quick summary of the KALLAX shelf screw size:

Length: 4mm
Diameter: 16mm

Screws for KALLAX Doors

For the KALLAX doors, IKEA uses a 3x16mm screw, the same size as the main unit's assembly. However, you'll need to use a countersink bit to create a recess for the screw head, ensuring a smooth, flush finish on the door's surface.

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To summarize, the KALLAX door screw size is:

Length: 3mm
Diameter: 16mm

Finding the Right Screws

Now that you know the KALLAX screw sizes, you might be wondering where to find them. IKEA offers replacement screws and hardware packs on their website and in-store. Alternatively, you can purchase screws from a local hardware store, ensuring they match the specified length and diameter.

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When buying screws, always double-check the dimensions to ensure they match the IKEA standard. Using the wrong size can lead to damaged furniture and a frustrating assembly experience.

Tips for Assembly

To make your KALLAX assembly as smooth as possible, consider these tips:

Sort your screws by size before starting to avoid confusion.
Use an electric screwdriver for faster and more efficient assembly.
Apply gentle pressure while screwing to prevent stripping the screw holes.

By following these tips and using the correct KALLAX screw size, you'll have your new furniture assembled in no time and ready to organize your space.

So, go ahead and embrace the world of IKEA furniture, knowing that with the right tools and a little patience, you can create functional and stylish spaces tailored to your needs. Happy assembling!