Chipboard screws 4.5 x 45 partial thread

Description

Reliable 4.5 x 45 mm Wood Screws for Strong Wood-to-Wood Connections

These 4.5 × 45 mm partial thread chipboard screws are developed for strong wood-to-wood connections in MDF, OSB, chipboard, plywood, and solid timber. The zinc-plated coating makes them suitable for indoor applications and provides protection against corrosion.

The Torx TX20 drive ensures maximum grip during installation and prevents cam-out. The countersunk head sits neatly flush with the wood surface, delivering a clean finish for visible applications and furniture construction.

With a 4.5 mm diameter, this screw offers greater load capacity than 4.0 mm screws, while the 45 mm length is ideal for standard board thicknesses.

Why choose these 4.5 x 45 mm chipboard screws?

✔ Ideal for 15–18 mm sheet material
✔ Partial thread — pulls two wooden parts tightly together
✔ 4.5 mm diameter — increased grip and stability
✔ Torx TX20 — prevents head damage and cam-out
✔ Zinc plated — suitable for indoor applications
✔ Pack of 200 pieces — ideal for project use

When do you use 4.5 x 45 mm screws?

A 4.5 x 45 mm partial thread chipboard screw is commonly used in standard interior and furniture constructions.

Typical applications:

• Fixing 15–18 mm MDF or chipboard onto timber framing
  
• Installing cabinet panels and furniture components
• Securing plywood sheets
• Wood-to-wood fastening in light interior structures
• Finishing and interior projects

Why is 45 mm a logical length?

For 18 mm sheet material, the technical guideline is:

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

Calculation example:

18 mm × 2.5 = 45 mm

With a 45 mm length:

✔ Sufficient penetration depth is achieved
✔ Good pull-out resistance is ensured
✔ The screw remains compact without unnecessary extra length
✔ Breakthrough at the rear side is prevented

This makes 4.5 x 45 mm a technically balanced size for standard board connections.

What makes these 4.5 x 45 mm screws suitable for MDF and chipboard?

With medium board thicknesses, it is important that:

• The top material is pulled tightly against the substrate
  
• The joint is not left under tension
• The screw has sufficient grip in the supporting timber

Thanks to the partial thread, only the lower timber section is engaged. This firmly pulls the upper material down, preventing open joints and ensuring a stable connection.

The 4.5 mm diameter provides additional strength compared to 4.0 mm screws.

Advantages of partial thread at 4.5 x 45 mm

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

Advantages:

✔ Higher clamping force between two wooden parts
✔ Tighter board-to-frame contact
✔ Reduced risk of visible gaps
✔ Efficient wood-to-wood fastening

For fastening sheet material onto timber battens, partial thread is often the best choice.

Installation and mounting advice

For optimal installation:

• Use a Torx TX20 bit
  
• Pre-drilling is usually not required in softwood
• Pre-drilling is recommended in hardwood
• Drive the screw in a controlled manner to prevent splitting

Tip: See our category for screwdriver bits and bit holders for the correct bit size and professional-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 way, you order not only the correct screws but also the necessary tools for efficient installation.

Not sure about the correct length? Also view our 4.5 x 50 mm and 4.5 x 60 mm variants for thicker materials.

Specifications

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