M12 × 20mm Socket Countersunk Barrel Nut / Sleeve Nut - A1 Stainless Steel

Flush finish barrel nuts

M12 × 20mm socket countersunk Barrel Nut in A1 stainless steel which delivers accurate alignment and a low-profile flush aesthetic finish when paired with the correct machine screw. 

Combined with a hex drive for easy installation with an Allen key or hex wrench which allows for high torque. 

Used in many applications including furniture manufacturing, joinery, cabinetry, architectural fittings, and structural panel assemblies.

Manufactured with an internal thread allowing a strong and secure joint and used by professionals and DIY enthusiasts alike.

Barrel Nut Specifications:

• Thread diameter (TD): M12 - 12mm
• Diameter (D): 16mm
• Head height (HH): 4.4mm
• Head diameter (HD): 24mm
• Length (L): 20mm
• Thread Length (TL): 12mm
• Hexagon Drive: 8mm
• Material: A1 Stainless Steel
• Finish: Natural
• Pitch: 1.75mm
  

Part of a selection of countersunk Barrel Nuts now available from Fusion Fixings..

FAQs about countersunk barrel nuts

What is a socket countersunk barrel nut and how does it work?

A socket countersunk barrel nut is a female threaded fastener (internal thread) with a countersunk head that sits flush with the material. It pairs with a bolt or machine screw to clamp two components tightly together.

What are barrel nuts used for in joinery and furniture assembly?

They are used where strong, hidden fixings are needed, such as bed frames, cabinets, metal-to-wood joints, and architectural fittings.

What is the benefit of the countersunk head on a barrel nut?

It allows the nut to sit flush with the surface, giving a clean finish while preventing snagging and improving aesthetics.

What length barrel nut do I need for furniture fixings?

Choose a length that matches the thickness of the material you're joining. A flush or near-flush fit is ideal for maximum strength.

Why choose a hex drive over a slotted drive on a barrel nut?

Socket drives allow higher torque, are less likely to strip, and provide a more secure fitting which is ideal for heavier structures.

Can socket countersunk barrel nuts be used for metal-to-wood fixings?

Yes. They are commonly used to join steel brackets to timber beams, furniture frames, and structural wooden assemblies.

Are barrel nuts reusable?

Yes, but like many fixings, it’s provided the threads aren’t damaged.

Can barrel nuts be used in hardwoods like oak or walnut?

Yes, but pre-drilling is essential. Hardwoods require accurate drilling to avoid splitting and ensure the nut aligns correctly.

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