Chipboard screws 4.0 x 40 full thread

Strong 4.0 x 40 mm Wood Screws for Sheet Material and Installation Work

These 4.0 × 40 mm full thread chipboard screws are designed for applications where stable grip across the entire screw length is required. The screws are suitable for use in solid wood, plywood, MDF, OSB and chipboard.

The Torx TX20 drive ensures optimal grip and efficient power transfer during installation. This prevents cam-out and allows the screw to be driven in smoothly and with control, including with this 40 mm version.

The countersunk head sits neatly flush with the wood surface and provides a clean finish for visible work and installation projects.

Thanks to the combination of a 4.0 mm diameter and 40 mm length, this size is ideal for sheet materials, light timber constructions and installation work where even force distribution is important.

Why choose these chipboard screws?

✔ Ideal for 15–20 mm thick materials
✔ Full thread — complete grip along the entire screw length
✔ 4.0 mm diameter — strong and stable fastening
✔ Torx TX20 — optimal grip and reduced slipping
✔ Suitable for sheet materials and installation work
✔ Pack of 200 pieces

When do you use 4.0 x 40 mm full thread screws?

A 4.0 × 40 mm full thread chipboard screw is used when materials need to be fixed without strong clamping force.

Typical applications:

• Fixing MDF, plywood and chipboard
• Mounting sheet material onto wooden substructures
• Installing panels and interior work
• Use with wall plugs in masonry or concrete
• Applications where equal force distribution is important

What is the difference between full thread and partial thread?

With full thread screws, the thread runs along the entire length of the screw.

This provides:

✔ Even grip along the entire screw
✔ Less clamping force between materials
✔ Ideal for sheet materials and mounting onto surfaces

For wood-to-wood connections where materials need to be tightly pulled together, it is better to choose partial thread chipboard screws or longer sizes such as 4.0 x 45 mm or 4.0 x 50 mm.

Why is 40 mm a logical length?

For materials around 15 mm thick, 40 mm is an ideal length.

The screw:

✔ Provides sufficient penetration into the base material
✔ Creates a stable fastening without drilling through the material
✔ Is suitable for general wood and sheet material applications

This makes 4.0 × 40 mm a widely used size for furniture, interior work and light constructions.

What makes these 4.0 x 40 mm screws suitable for MDF, plywood and wood?

When working with sheet materials, it is important that:

✔ The screw provides grip throughout the material
✔ The material does not deform
✔ The fastening remains secure

Thanks to the full thread, the screw grips along its entire length, ensuring a stable and evenly distributed fastening.

The 4.0 mm diameter also offers an excellent balance between strength and ease of installation.

Benefits of Full Thread in 4.0 x 40 mm Screws

Unlike partial thread screws, the thread on this version runs along the entire length of the screw.

This provides:

✔ Maximum grip within the material
✔ Even force distribution
✔ Strong fastening of sheet materials
✔ Reduced risk of joints loosening over time

For installation work and sheet material fixing, full thread screws are often the best choice.

Installation and Mounting Advice

For best results:

• Use a Torx TX20 bit
• Pre-drilling is usually not necessary in softwood
• Pre-drilling is recommended in hardwood
• Drive the screw in with control

Tip: Use high-quality Torx bits for optimal grip and longer tool life.

Why order these screws from EnergyBy?

✔ Directly available from stock
✔ Competitive pricing per pack
✔ Complete and clear product specifications for every size
✔ Fast and reliable delivery
✔ Combine with Torx bits and mounting materials

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

Not sure which length you need?

• Choose full thread → for fixing materials onto a substrate
• Choose partial thread → for wood-to-wood connections

Also view our:

• 4.0 x 35 mm full thread chipboard screws
• 4.0 x 45 mm full thread chipboard screws
• 4.0 x 50 mm full thread chipboard screws