ᐅ Missing BILLY Shelf Screws: What Can I Use as a Replacement?

Hello everyone,

I just assembled a Billy bookshelf from IKEA, but when I got to the screws pack, important screws were missing—especially the wood screws for the back panel and some connector screws. My question is: What can I use as replacements for the missing screws without compromising the stability and safety of the bookshelf? Is there an alternative with similar strength that holds well in wood? I’m considering using common household screws or something else, but I don’t want to take any risks, and of course, I want the bookshelf to look neat. Thanks in advance for your advice!

You can use regular chipboard screws with the same diameter and length. Make sure the screw head fits properly. For the back panel, thinner nails or special panel pins are suitable.

janfo schrieb:
You can use regular chipboard screws of the same thickness and length.

Exactly! Chipboard screws are basically the all-rounders in the world of furniture screws 😄 The important thing is that the screw isn’t too long to avoid splitting or piercing the wood. For the BILLY, you can also use dowels if you want, in case the screw needs to withstand greater pulling force.

I would recommend first checking exactly which screws you are missing – the BILLY shelves mainly use chipboard screws sized M4 or M5 with lengths of about 15 to 25 mm (0.6 to 1 inch), depending on the connection point. For the back panel, IKEA usually uses thin nails or so-called backing clips, which are a bit more flexible.

As replacements, chipboard screws with a similar thread profile are ideal because they are specifically designed for wood-based materials and provide a secure hold. It is important to choose approximately the same length and a suitable screw head (often at least countersunk or flat head).

For the back panel, you can alternatively attach thin wooden strips with small screws that you can have cut to size at a hardware store. These stores often also sell sets of backing nails in various lengths, which are inexpensive.

Please note not to use screws that are too long or too thick, as this could damage the wood or prevent parts from connecting properly. If you like, I can help you find exact dimensions or approved screws if you provide more details.

Chipboard screws from hardware stores, typically sized 4x30 mm (approximately 0.16x1.2 inches), usually work well as replacements. Back panel nails are thin, about 15 mm (0.6 inches) long, and can be easily replaced.

Thanks in advance for the tips!

The missing screws are mostly the longer crosshead connector screws that hold the shelf together, and then the narrower ones for the back panel.

I have some concerns about the exact thread type because I don’t want to damage the material. Are there typical specifications to identify which replacement screw will really fit? For example, screw type, diameter, thread type?

Maybe someone can also explain how to determine the correct screw length for this purpose? I don’t want the screws to be too long and come out the back.