How to Use Allen Key Bolt Cap Screws in Furniture Assembly

How To Use Allen Key Bolt Cap Screws

Allen Key Bolt Cap Screws in Furniture Assembly

Do-it-yourself furniture assembly can be both a fulfilling activity and a practical way to customise your living space. Most flat-pack furniture relies heavily on one component – the Allen key bolt cap screw. Despite its intimidating name, this small but mighty piece of hardware is what holds your furniture together and ensures its stability. In this blog post, we’ll guide you through the process of using Allen key bolt cap screws in furniture assembly, making it a smoother and more enjoyable experience.

Why Allen Key Cap Screws?

Allen key bolt cap screws, also known as hex key screws, are frequently used in flat-pack furniture because of their sturdy design, which provides a strong connection between the pieces of furniture. The ‘cap’ refers to the head of the bolt, which is typically slightly rounded, giving a neat finish.


1. Secure and Stable Connections: Allen key bolt cap screws provide strong, secure connections that help to ensure the stability of the assembled furniture. The hexagonal socket head allows for a better torque transfer from the tool to the bolt, resulting in a firmer and tighter fit.

2. Easy to Use: These screws are simple to use, often requiring only the supplied Allen key. This makes the assembly process more straightforward, even for those who are not particularly handy.

3. Aesthetically Pleasing: The cap of these screws provides a neat, clean finish. When fully inserted, they often sit flush with or slightly below the surface of the furniture, offering a sleek appearance and preventing any sharp edges from protruding.

4. Damage Resistant: The design of the Allen key bolt cap screws means the force applied during tightening is spread evenly. This reduces the risk of damage to the screw head, making these screws more durable and less likely to be stripped or deformed during assembly.

5. Versatility: Allen key bolt cap screws are suitable for use in a wide range of materials including wood, metal and plastic, making them incredibly versatile for all kinds of furniture.

6. Easy Disassembly: If you ever need to disassemble your furniture for moving or storage purposes, these screws can be easily removed and reinserted without damaging the furniture or the screws themselves.

Allen Key Bolt Cap Screw

What You’ll Need:

Allen Key Bolt

  1. Flat-pack furniture kit (which should include the Allen key bolt cap screws)
  2. Allen key (usually included in the furniture kit)
  3. A clean, flat surface for assembly

Step-by-step Guide to Using Allen Key Bolts 

Step 1: Identify the Screws and the Allen Key

Your flat-pack furniture will come with an instruction manual, which should have a page detailing all the components included in the box. Identify the Allen key bolt cap screws and the Allen key. The Allen key is a small L-shaped tool that fits into the head of the bolt cap screws.

Step 2: Follow the Assembly Instructions

Begin by following the assembly instructions in the manual. At each step that requires the use of an Allen key bolt cap screw, you’ll notice that the manual indicates where the screw needs to go.

Step 3: Insert the Screws

Insert the Allen key bolt cap screw into the appropriate hole in the furniture. The screws should go in easily without requiring force. If you need to apply a lot of pressure, double-check to ensure you’ve got the right location and orientation.

Step 4: Tighten the Screws

Once the bolt cap screw is correctly placed, use the Allen key to tighten it. Insert the short end of the Allen key into the bolt head and turn the long end clockwise to tighten the screw. Continue turning until the screw is firmly in place, but be careful not to overtighten as this can strip the screw hole or damage the furniture.

Step 5: Repeat the Process

Repeat this process for each Allen key bolt cap screw in the assembly instructions.

To disassemble: 

1. Identify the Screws: The first step in disassembling Allen key bolt cap screws is to identify them. They are typically characterised by a hexagonal or six-sided indentation on the head of the screw.

2. Locate the Correct Allen Key: Once you’ve identified the screws, you’ll need the correct size Allen key. It’s typically the same one you used for assembly and is often included in the flat-pack furniture kit. If you can’t find it, you can purchase Allen key sets from most hardware stores. Make sure to find one that fits snugly into the screw head; using the wrong size can strip the screw head.

3. Turn Counterclockwise to Unscrew: Insert the short end of the Allen key into the screw head. Apply a bit of pressure to ensure it’s securely in the screw head, then turn the long end of the key counterclockwise to start unscrewing. If the screw doesn’t budge, you can use the long end of the key for more leverage, but be careful not to apply too much force to avoid damaging the furniture or the screw.

4. Repeat the Process: Repeat this process for each Allen key bolt cap screw that you need to remove. It’s generally a good idea to disassemble the furniture in reverse order of the assembly steps. This way, you can keep track of the screws and other hardware and know exactly where they belong when it comes time to reassemble the furniture.

5. Store Safely: Once removed, be sure to store the screws and Allen key in a safe place so they won’t get lost. If possible, place them in a labeled bag or container.

Allen Key Bolt Cap Screw

Building Your Own Furniture 

An Allen key bolt cap screw is a staple of flat-pack furniture, providing a secure connection between various components. By using them effectively, your furniture assembly process can become more efficient and less stressful. Always follow the assembly instructions closely, tighten the screws properly, and enjoy the process. Making your own furniture in your own home can be an incredibly rewarding experience.

As always, thank you for checking out our blog. We hope that this helps you with your project. 

Please also check out the other articles in our helpful guide series. We have written about fasteners recently and we have a wide variety so why not check it out? 

We are also proud to sell this product on our highly popular eBay store, check us out there too.

If you have any further questions, feel free to contact us.

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