Chipboard Screws 4.5x70 mm Partial Thread Zinc Plated | 200 Pieces
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Chipboard Screws 4.5x70 mm Partial Thread – Zinc Plated Torx TX20 (200 Pieces)

Chipboard Screws 4.5x70 mm Partial Thread – Zinc Plated Torx TX20 (200 Pieces)
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Description

Reliable 4.5x70 mm Wood Screws for Strong Wood-to-Wood Connections

These 4.5 × 70 mm partial thread chipboard screws are designed for strong and stable wood connections in solid wood, plywood, MDF, and particleboard. The zinc-plated finish makes them suitable for indoor applications and provides protection against light corrosion.

The Torx TX20 drive ensures optimal grip during installation and prevents cam-out. The countersunk head sits flush with the wood surface, creating a clean finish without protruding screw heads.

With a 4.5 mm diameter and 70 mm length, this size is particularly suitable for medium-duty to structural wood connections.

Why choose these chipboard screws?

✔ Ideal for boards and battens 26–28 mm thick
✔ Partial thread profile — powerfully pulls wood sections together
✔ 4.5 mm diameter — higher load capacity than 4.0 mm
✔ Torx TX20 — prevents slipping and damage
✔ Zinc-plated — suitable for indoor use
✔ Pack of 200 pieces — ideal for larger projects

When should you use 4.5 x 70 mm screws?

A 4.5x70 mm partial thread chipboard screw is used for medium-duty wood joints where sufficient penetration depth and clamping force are required.

This size is commonly used for:

  • Fixing boards 26–28 mm thick
  • Connecting framing and wooden beams
  • Interior construction and furniture making
  • Installing thick plywood or furniture panels
  • Wood-to-wood connections requiring higher pull-out resistance

Why is 70 mm a logical length?

When fastening 28 mm material, the practical rule of thumb is:
The screw should penetrate at least 2.5 to 3 times the thickness of the top material into the lower wood section.

28 mm × 2.5 = 70 mm

This ensures:

  • Sufficient penetration depth
  • High pull-out resistance
  • Improved structural stability
  • Reduced risk of loosening

This makes 4.5 x 70 mm a widely chosen size for solid wood constructions.

What makes these 4.5x70 screws suitable for MDF, plywood, and solid wood?

With thicker wood sections, it is important that:

  • The top material is firmly pulled down
  • The joint does not remain under tension
  • The screw provides sufficient grip in the load-bearing wood

Thanks to the partial thread, only the lower section of the screw grips into the wood. This actively pulls the top material downward, ensuring a tight and stable joint.

The 4.5 mm diameter also provides additional torsional strength and bending resistance during deeper installation.

Advantages of partial thread in 4.5x70 mm screws

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

This results in:

✔ Higher clamping force between two wooden parts
✔ Better tightening in beam-to-beam connections
✔ Reduced risk of visible gaps
✔ More efficient wood-to-wood fastening

For structural wood connections, partial thread is often more effective than full thread.

Installation and mounting advice

For optimal installation:

  • Use a Torx TX20 bit
  • Pre-drilling is usually not required in softwood
  • A pilot hole is recommended in hardwood
  • Drive the screw in steadily for maximum grip

Tip: Check our category for screwdriver bits and holders to select the correct bit size and quality.

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 for direct ordering

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

Not sure about the right length? Also view our 4.5x50 mm and 4.5x60 mm variants for thinner materials.

Specifications

Article number306.45070.1022
EAN nummer8712543051822
Finish Zincplated
Thread type Partial thread
Head shape Countersunk head
Brand White label
Model chipboard screw partial thread
Length 70 mm
Execution Deeldraad
Pack 200
Connection TX-20
Material steel zincplated
Certification none
Diameter 4.5 mm
Collecties 2 screws

Frequently Asked Questions

A 4.5 x 70 mm partial thread chipboard screw is suitable for wood-to-wood connections in medium-duty applications.

Typical applications:

  • Fastening 26–28 mm thick boards
  • Connecting wooden battens and beams
  • Mounting overlay boards
  • Furniture and interior constructions

    The 70 mm length ensures sufficient anchoring into the underlying timber.

    Thanks to the partial thread, extra clamping force is created, resulting in a strong and stable wood joint.
    Choose a 4.5 x 70 mm screw for wood-to-wood connections when:


    • The top timber section is approximately 25–30 mm thick
    • The load is light to medium duty
    • You want to reduce the risk of splitting in narrower battens

      Choose a 5.0 x 80 mm screw when:

      • The timber is thicker
      • Higher pull-out resistance and clamping force are required
      • The construction will carry heavier loads
        For heavy timber constructions or beam connections, Constructions screws wafer head are often more suitable due to their larger bearing surface and higher load capacity.
        In softwood (spruce, pine), pre-drilling is usually not necessary.

        In hardwood (oak, meranti, bankirai), pre-drilling is strongly recommended to:

        • Prevent splitting
        • Reduce driving torque
        • Avoid screw breakage

          Recommended pilot hole size:

          • Approx. 3.0–3.5 mm for hardwood
          When fastening close to the edge of the timber, pre-drilling is always advisable.
          For a 4.5 x 70 mm chipboard screw, use a Torx TX20 (T20) bit.

          Advantages of Torx drive:

          • Optimal torque transfer
          • Less cam-out compared to Pozidriv
          • Longer lifespan of bit and screw head
          • Suitable for powerful cordless drills
            For professional or intensive use, a hardened TX20 bit is recommended. Browse our full range of bits and holders to ensure you’re using the correct bit for your screws and achieving the best installation results.
            No. For long-term outdoor use, stainless steel screws (A2 or A4) are recommended to prevent corrosion and deterioration.

            Zinc-plated screws are suitable for:

            • Indoor applications
            • Dry areas
            • Lightly humid environments

              Examples include:

              • Interior constructions
              • Furniture assembly
              • Finishing work in sheds or garages
              A partial thread screw has threading only on the lower part of the shank.

              How does it work?

              • The smooth upper section slides through the first piece of wood
              • The threaded section grips into the second piece
              • The two wooden parts are pulled tightly together

                Benefits in timber connections:

                • Higher clamping force
                • Stronger structural joint
                • Reduced risk of movement or play
                  Partial thread screws are therefore ideal for wood-to-wood constructions.
                  A partial thread chipboard screw has a countersunk head and is used for wood-to-wood connections where the screw needs to sit flush with the surface.

                  A construction screw wafer head has a wide head that distributes pressure over a larger area and is used in heavier, load-bearing timber constructions.

                  Choose a 4.5 x 70 mm partial thread screw when:

                  • The fixing must sit flush
                  • The screw should not be visible
                  • You are working with boards of approximately 26–28 mm

                    Choose a washer head screw when:

                    • Additional load capacity is required
                    • Beams or heavy structural components are being fixed
                      This helps ensure you select the right screw for your timber construction project.

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