ᐅ Which screws are best suited for assembling the Ikea BESTA units?

Hello everyone, I am currently planning the assembly of an Ikea Besta furniture system and came across the question of which screws are best suited for the assembly. Ideally, the screws should not only hold securely from a mechanical standpoint but also fit the pre-drilled holes and connection points. I am particularly wondering whether it is better to use the original screws or if there are higher-quality alternatives among standard screws that might be more durable or stronger—for example, regarding material or thread type. Does anyone have experience and can recommend which screws work best for assembling the Besta system, ensuring everything is stable while still being easy to install?

barlas67 schrieb:
It is best if the screws not only hold securely from a mechanical standpoint but also fit the pre-drilled holes and connection points.

Hello, that is a very good question, especially since IKEA furniture is often designed for simple assembly and moderate stability. In my experience, the original connecting screws, such as cam bolts combined with wood screws, work very well because they are precisely matched to the drill holes. If you are looking for replacements, you should definitely choose hardened steel screws with a metric thread (usually M4 or M5 for BESTA). It is also important that the thread is not too coarse so that it grips cleanly in the wood fiber material without stripping. Alternatively, countersunk screws are also suitable to keep the surface flush.

As an addition: The original screws used in the Ikea Besta system are typically zinc-plated C25 or similarly alloyed steel screws. They are specifically designed for particleboard. If you are looking for replacements, you should use screws with the following features:
- M4 or M5 thread size
- Countersunk or flat head for flush mounting
- Zinc-plated or stainless steel finish for corrosion protection
- Fine wood thread for chipboard (not coarse sheet metal or machine screws)
A good alternative is chipboard screws, which are available from specialist suppliers. However, as mentioned, it is essential to pay attention to the correct thread size to avoid damaging the intended material.

I have always used the original screws during assembly. They fit perfectly, and the holes are precisely made for them. Replacement screws should only be used if you know the exact dimensions of the originals.

If you need a replacement, use standard chipboard screws M4x40mm (1/8 x 1 5/8 inches) made of galvanized steel. They usually fit well and provide stable support.

Fitigu schrieb:
The original screws from Ikea used in the Besta system are usually galvanized C25 or similarly alloyed steel screws.

That is correct. Additionally, I want to emphasize that when replacing screws, the load-bearing capacity especially in particleboard material must be considered. Screws that are too thick can cause the wood to split. I also recommend not driving the screws too deep to avoid damaging the material, which is particularly important for the stability of furniture like BESTA.