Chipboard screws 5.0 x 120 partial thread

Description

Strong 5.0 x 120 mm Wood Screws for Robust Wood-to-Wood Connections

These 5.0 × 120 mm partial thread chipboard screws are designed for strong wood connections where deep penetration and high clamping force are required. The screws are suitable for applications in solid timber, plywood, MDF, and chipboard.

The zinc-plated coating protects against corrosion in indoor environments. Thanks to the Torx TX25 drive, installation force is transferred efficiently, preventing cam-out and allowing the screw to be driven in with control—even with longer screws such as this 120 mm version.

The countersunk head sits neatly flush with the wood surface, providing a clean finish for both structural applications and visible work.

With a 5.0 mm diameter and 120 mm length, this screw size is ideal for heavy wood-to-wood connections and thicker timber components.

Why choose these chipboard screws?

• Ideal for 40–50 mm thick boards and beam connections
  
• Partial thread — firmly pulls two wooden parts together
• 5.0 mm diameter — high load capacity and stability
• Torx TX25 — optimal grip with reduced risk of cam-out
• Zinc plated — corrosion protection for indoor use
• Pack of 200 pieces — suitable for larger projects

When do you use 5.0 x 120 mm screws?

A 5.0 x 120 mm partial thread chipboard screw is used when a deep and strong wood connection is required.

Typical applications include:

• Fixing 40–50 mm thick boards
  
• Connecting wooden beams and battens
• Heavy furniture constructions
• Timber frame structures and framing work
• Wood-to-wood connections requiring high pull-out resistance

Why is 120 mm a logical length?

For a board thickness of approximately 40 mm, the general guideline is:

The screw should penetrate at least 2.5 to 3 times the thickness of the top material into the supporting timber.

40 mm × 3 ≈ 120 mm

With a 120 mm screw, this means:

✔ Sufficient penetration depth
✔ High pull-out resistance
✔ A very stable structural connection

This makes 5.0 × 120 mm highly suitable for heavy timber constructions.

What makes these 5.0 x 120 mm screws suitable for MDF, plywood and solid timber?

When working with thicker wooden components, it is important that:

• The top material is firmly pulled against the supporting timber
• The connection remains stable under load
• The screw has sufficient grip in the supporting wood

Thanks to the partial thread, only the lower section of the screw engages the timber. This actively pulls the upper material downward, creating a strong and stable connection without gaps.

The 5.0 mm diameter also provides additional torsional and bending strength during installation.

Advantages of partial thread at 5.0 x 120 mm

Unlike full thread screws, this version has thread only on the lower section.

This results in:

✔ Higher clamping force between two wooden parts
✔ Tighter connection of structural components
✔ Reduced risk of open joints
✔ More efficient wood-to-wood fastening

For structural wood connections with thick panels or beams, partial thread screws are often the preferred solution.

Installation and mounting advice

For best results:

• Use a Torx TX25 bit
  
• Pre-drilling is usually not required in softwood
• A small pilot hole is recommended in hardwood
• Drive the screw slowly and in a controlled manner

Tip: see our category for screwdriver bits and holders to choose the correct bit size and quality tools.

Why order these screws from EnergyBy?

✔ Directly available from stock
✔ Competitive price per pack
✔ Clear and complete product specifications per size
✔ Fast and reliable delivery
✔ Matching Torx bits and fastening materials available

This ensures you order not only the correct chipboard screws, but also the tools needed for efficient installation.

Not sure about the right length? Also view our 5.0x90 mm and 5.0x100 mm variants for thinner materials.

Specifications

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