ᐅ Finding Replacement Screws for Shelving Units in Home Improvement Stores – Practical Tips

Hello everyone,

I lost some screws from my Billy shelf and would like to buy replacement screws as easily as possible at a hardware store. However, I have noticed that the screws for this type of furniture often have specific sizes or head shapes that are not usually included in standard assortments.

My question is: Which screws (sizes, types) are best suited as replacements, and which hardware stores generally offer a good selection for this purpose? Are there any practical tips for clearly identifying these screws before going to the store in order to avoid buying the wrong ones?

I would appreciate it if anyone could share their experience.

Hello Mulabi,

first of all, good question! For Billy shelves, the replacement screws are usually chipboard screws with a countersunk head, often in sizes 4 x 30 mm (4 x 1.2 inches) or 4 x 40 mm (4 x 1.6 inches). It is also common for them to have a cross recess (Philips) screwdriver profile.

When you go to the hardware store, it’s best to bring an intact screw from the shelf to compare directly with the available options. Many hardware stores now have well-organized screw sections with small sample packs or even individual screws.

Tip: Pay attention to whether the screw has a special coating (e.g., galvanized or black). This helps with visual matching. Also, before purchasing, check that the thread pitch and screw head fit the existing hole to ensure the stability is not compromised.

If you no longer have an original screw, it might be useful to know the model year of the Billy shelf, as there can be small differences in the fastenings depending on the production year.

angel schrieb:
For Billy shelves, the replacement screws are usually chipboard screws with countersunk heads, often sized 4 x 30 mm (4 x 1.2 inches) or 4 x 40 mm (4 x 1.6 inches).

That is correct and important to add: the screws are usually zinc-plated and have a medium thread pitch, so you should avoid using coarse or very fine threaded screws to prevent damaging the shelf.

Another practical tip: hardware stores often have screw sample cards or screw gauges that allow you to measure the screw head size and thread dimensions directly. This makes precise matching much easier.

Many also use tool shops or specialized ironmongers because their selection of standard screws is more finely graded.

Regarding hardware stores, Hornbach, Bauhaus, and Obi tend to be reliable since these chains offer a wide range of metric screws suitable for furniture.

SUBEN60 schrieb:
Many also use hardware stores or specialized ironmongers because they offer a finer selection of standard screws.

That’s a good point, although I have to slightly disagree: one might think that big-box home improvement stores are perfect, but in reality, they often only sell what sells best—not always what’s best in terms of quality or fit accuracy.

Especially with furniture like Billy, made from particleboard, small deviations in screws shouldn’t be underestimated. If you get lost in a chaotic screw assortment at the hardware store, it’s easy to buy the wrong screws that can damage the furniture.

My advice would be: don’t just pay attention to the size, but also to the material and surface finish—sometimes specialty screws from trade suppliers are better because they don’t rust and cause less swelling in the wood.

Just something to consider if someone mainly focuses on price and then ends up struggling with wobbly shelves.

For replacement screws for Billy shelves, it’s best to bring the following dimensions: 4 mm diameter, 30-40 mm (1.2-1.6 inches) length, countersunk head, Phillips drive. Hardware stores like Hornbach or Bauhaus usually carry standard items.

Practical tip: Bring a screw with you or measure it beforehand.

Quality matters: Zinc-plated is standard, stainless steel is better if possible.

likuken schrieb:
One might think that hardware stores are perfect, but in reality, they often only sell what sells best – not always what is highest in quality or most precise in fit.

That is basically correct regarding the product range. However, it should not be forgotten that hardware stores need to cater to a wide range of customer demands. For many DIY enthusiasts, standard chipboard screws are perfectly sufficient and offer good value for money.

Another point: If you have more specific requirements, it is worthwhile to visit a specialized hardware supplier or online shops that carry furniture fittings. There, you often also find copies of the original screws or even genuine replacement parts from Ikea directly.

One more tip: If the screw is important for the shelf (e.g., load-bearing connections), it is better to be on the safe side and either order original screws or ask a specialist retailer for additional information.