Chipboard screws 4.5 x 80 partial thread

Description

Reliable 4.5 x 80 mm Wood Screws for Robust Wood-to-Wood Connections

These 4.5 × 80 mm partial thread chipboard screws are designed for strong wood-to-wood connections in medium-duty to heavier applications. The zinc-plated coating provides reliable corrosion protection for indoor use.

Thanks to the Torx TX20 drive, you benefit from excellent grip during installation, preventing cam-out and ensuring controlled fastening. The countersunk head sits neatly flush with the wood surface, delivering a clean finish for visible work.

With a 4.5 mm diameter and extended 80 mm length, these screws are highly suitable for structural wood connections requiring deeper penetration, such as thicker panels and framing.

Why choose these 4.5 x 80 mm chipboard screws?

✔ Ideal for 25–28+ mm panels and timber framing
✔ Partial thread — powerfully pulls two wooden parts together
✔ 4.5 mm diameter — increased torsional and bending strength
✔ Torx TX20 — prevents cam-out and head damage
✔ Zinc plated — corrosion protection for indoor applications
✔ Pack of 200 pieces — suitable for medium to large projects

When do you use 4.5 x 80 mm screws?

A 4.5 x 80 mm partial thread screw is commonly used when sufficient penetration depth is required for thicker materials or medium-duty structural connections.

Typical applications:

• Fixing 25–28+ mm thick panels
• Connecting thick battens and frames
• Furniture construction with heavy sheet material
• Wall and interior framing
• Wood-to-wood connections requiring high pull-out resistance

Why is 80 mm a logical length?

For 25–28 mm sheet material, it is technically recommended that:

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

Calculation example:

25 mm × 3 = 75 mm
28 mm × 3 = 84 mm

With an 80 mm screw length:

• Sufficient penetration depth is achieved
• High pull-out resistance is ensured
• Structural stability is created
• Breakthrough at the rear side is prevented

This makes 4.5 x 80 mm an excellent choice for thicker timber constructions.

What makes these 4.5 x 80 mm screws suitable for MDF, OSB and solid timber?

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

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

Thanks to the partial thread, only the lower section engages the timber, firmly pulling the upper material downward. This minimizes stress within the sheet material and prevents gaps.

The 4.5 mm diameter also provides additional torsional and bending strength during installation in thicker timber.

Advantages of partial thread at 4.5 x 80 mm

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

This results in:

✔ Higher clamping force between two wooden parts
✔ Strong tightening effect in frame and beam connections
✔ Reduced risk of open joints
✔ More efficient wood-to-wood fastening

For structural applications involving thicker materials, partial thread is often more effective than full thread.

Installation and mounting advice

For best results:

• Use a Torx TX20 bit
  
• Pre-drilling is usually not required in softwood
• Pre-drilling is recommended in hardwood or very thick beams
• Drive screws in a controlled manner to prevent splitting

Tip: See our category for screwdriver bits and 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 ensures you order not only the correct chipboard screws, but also the necessary tools for efficient installation.

Not sure about the right length? Also view our 4.5x60 mm and 4.5x70 mm variants for thinner materials.

Specifications

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