Chipboard screws 4.5 x 40 partial thread

Description

Strong 4.5 x 40 mm Wood Screws for Light Wood-to-Wood Connections

These 4.5 × 40 mm partial thread chipboard screws are designed for light to medium-duty wood connections where good clamping force and a clean finish are required. The screws are suitable for applications in solid wood, plywood, MDF, OSB and chipboard.

The Torx TX20 drive ensures optimal grip and efficient torque transfer during installation. This prevents cam-out and allows the screw to be driven in smoothly and with control, which is ideal for shorter screws such as this 40 mm version.

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

With a 4.5 mm diameter and 40 mm length, this size is ideal for light constructions and fastening thinner boards and wooden components.

Why choose these chipboard screws?

✔ Ideal for 15–20 mm thick boards and sheet materials
✔ Partial thread — effectively pulls two wooden parts together
✔ 4.5 mm diameter — strong and versatile fixing
✔ Torx TX20 — optimal grip with reduced risk of cam-out
✔ Suitable for interior work and light wood constructions
✔ Pack of 200 pieces — ideal for larger jobs

When do you use 4.5 x 40 mm screws?

A 4.5 × 40 mm partial thread chipboard screw is used when a compact wood connection with sufficient clamping force is required.

Typical applications include:

• Fixing thin boards (15–20 mm)
• Installing MDF, plywood and chipboard
• Furniture assembly and interior construction
• Fixing skirting boards and panels
• Light wood-to-wood connections

Chipboard screws are specifically designed for wood and sheet materials, ensuring a strong connection without splitting the material.

Why is 40 mm a logical length?

For a board thickness of approximately 15 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 wood.

15 mm × ±2.5 ≈ 40 mm

Using a 40 mm screw ensures:

✔ Sufficient penetration depth
✔ Good pull-out resistance
✔ A stable connection for light applications

This makes 4.5 × 40 mm an ideal choice for interior and sheet material applications.

What makes these 4.5 x 40 mm screws suitable for MDF, plywood and solid wood?

When working with thinner materials, it is important that:

• The top material is properly pulled down
• The connection remains tight
• The screw provides sufficient grip

Thanks to the partial thread, the top material is pulled firmly downward, creating a tight and clean connection.

The 4.5 mm diameter provides sufficient strength without damaging the material.

Advantages of partial thread at 4.5 x 40 mm

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

This results in:

✔ Better clamping force between two parts
✔ Tighter material connection
✔ Reduced risk of gaps or open joints
✔ Ideal for wood-to-wood connections

For light constructions and sheet materials, partial thread is an efficient choice.

Installation and mounting advice

For best results:

• Use a Torx TX20 bit
  
• Pre-drilling is usually not required in softwood
• Light pre-drilling is recommended in hardwood
• Drive the screw slowly and in a controlled manner

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 right length? Also view our 4.5×45 mm and 4.5×50 mm variants for slightly thicker materials.

Specifications

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