ᐅ What screw lengths are most suitable for IKEA Platsa projects?

Hello everyone, I would like to know which screw lengths work best in practice for IKEA Platsa projects. Specifically, I am interested in how to secure the different panel thicknesses and types of connections using screws of various lengths, without the screw being too short to hold properly or too long so that it might go through the wood or cause damage. I am currently working on a Platsa system with carcasses, drawers, and shelves, and I am unsure whether to use, for example, 30mm (1.2 inches) or 40mm (1.6 inches) screws, and where each size might be advantageous. Does anyone have experience or recommendations, especially regarding load-bearing capacity and long-term stability? Thanks in advance!

For most Platsa carcasses, 30mm (1.2 inches) screws are sufficient. If you are joining thicker parts or want additional stability, use 40mm (1.6 inches) screws. However, make sure the screws do not go all the way through the panels.

Hello Tauni6, I would like to address your question in more detail because choosing the right screw length for Platsa is really important for stability and safety. Essentially, the correct screw length depends on the thickness of the material you are joining and the purpose of the connection.

- For thin panels (about 12 mm (0.5 inches)), 30 mm (1.2 inches) screws are almost always suitable, for example when connecting carcasses or shelves.
- When joining two thicker parts, such as carcasses with the back panel or side panels, 40 mm (1.6 inches) screws are better to ensure sufficient holding power.
- For shelves or small connectors that carry less load, screws of 25–30 mm (1–1.2 inches) are often enough.

It is important that the screw grips the wood securely and is not too short, so the connection remains stable, but also not too long so it does not go through the panel. The best approach is to measure the thickness of the panels you want to join and then select a screw about 1.5 to 2 times the length of the thickest panel being drilled. The screw head and thread diameter also play a role—in IKEA Platsa, medium diameter metal screws are commonly used.

I hope this helps you with your planning!

Tauni6 schrieb:
I am currently working on a Platsa system with carcasses, drawers, and shelves, and I'm unsure whether to use 30 mm (1.2 inch) or 40 mm (1.6 inch) screws and where each size offers advantages.

In general, I recommend using 30 mm (1.2 inch) screws for the carcass construction, as these are usually sufficient to securely join the material without damaging the panels. 40 mm (1.6 inch) screws provide extra hold where load-bearing connections are required or for particularly thick panels, such as back panels that are sometimes 16 mm (0.6 inch) thick.

For drawers and shelves, screws should be used sparingly, and it’s best to follow the recommended fasteners provided by IKEA, since screws that are too long can interfere with function. Depending on the connection, it can also be beneficial to use dowels or specialized connectors.

In short:
- 30 mm (1.2 inch) for standard panels and carcasses
- 40 mm (1.6 inch) for thicker joints and added stability

Always check screw lengths on a test piece before ordering or using large quantities.

Ianlau schrieb:
It’s best to measure the thicknesses of the boards you need to join and then choose screws that are about 1.5 to 2 times as long as the thickest board being drilled through.

Exactly, that’s the golden rule! 🙂

I would also add this: when trying out different screw lengths, pay some attention to the screw heads as well – for example, countersunk heads can feel better in folding mechanisms.

Who hasn’t experienced it: the screw is too long, and suddenly the drawer bottom only holds by a stroke of luck.

My tip: get 30mm (1¼ inches) screws for most connections and 40mm (1½ inches) if you need something sturdier. Then take your time checking everything, with a bit of patience – Platsa isn’t the most complicated project, but it can definitely leave you with a screw spinning in your head 😉 Good luck!