Best Heavy Duty Wood Screws 40mm of 2025

Last updated on 30/12/2025

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Brackit Wood Screws 820Pc Assortment - Zinc-Plated Extra Strong Countersunk Pozi Drive Head Wood Screw Set – For Floorboard,Wood Fences, Large Screw Set

Brackit Wood Screws 820Pc Assortment - Zinc-Plated Extra Strong Countersunk Pozi Drive Head Wood Screw Set – For Floorboard,Wood Fences, Large Screw Set

Solid plastic storage box.
Screws for multiple materials.
Ideal for DIY tasks.

Main Highlights

WOOD SCREWS BOX STORAGE: Each set is neatly packaged in a solid plastic storage box with a clear lid and compartments to keep the screws organised and ready to grab
WOD SCREWS HEAVY DUTY: Our high-quality wood screws can be used indoor or outdoor and are suitable for use on wood, plastic and PVC and for DIY tasks including furniture repair and building, fencing construction or as heavy duty screws for building

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Brackit Wood Screws 820Pc Assortment - Zinc-Plated Extra Strong Countersunk Pozi Drive Head Wood Screw Set – For Floorboard,Wood Fences, Large Screw Set

Solid plastic storage box.
Screws for multiple materials.
Ideal for DIY tasks.

Main Highlights

WOOD SCREWS BOX STORAGE: Each set is neatly packaged in a solid plastic storage box with a clear lid and compartments to keep the screws organised and ready to grab
WOD SCREWS HEAVY DUTY: Our high-quality wood screws can be used indoor or outdoor and are suitable for use on wood, plastic and PVC and for DIY tasks including furniture repair and building, fencing construction or as heavy duty screws for building

Value for Money

4x40mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs)

4x40mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs)

Heavier and thicker construction.
Guaranteed never to rust.
Works with manual screwdrivers.

Main Highlights

HEAVIER&THICKER：When the quantity and model are the same,Our screws are heavier;zinc coating is thicker.
HIGH CORROSION RESISTANCE:The screws are yellow zinc passivated and to withstand 72 hours salt spray test, never rust is guaranteed.
HIGH STRENGTH:The outdoor screws have high Strength philips head,Perfect match with manual and electric screwdrivers.
HIGH HARDNESS:These self tapping screws are heat treatment improves the tensile strength.
VARIOUS PRODUCT USES：High performace for the home and engineering,These flat head screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic.

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4x40mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs)

Heavier and thicker construction.
Guaranteed never to rust.
Works with manual screwdrivers.

Main Highlights

HEAVIER&THICKER：When the quantity and model are the same,Our screws are heavier;zinc coating is thicker.
HIGH CORROSION RESISTANCE:The screws are yellow zinc passivated and to withstand 72 hours salt spray test, never rust is guaranteed.
HIGH STRENGTH:The outdoor screws have high Strength philips head,Perfect match with manual and electric screwdrivers.
HIGH HARDNESS:These self tapping screws are heat treatment improves the tensile strength.
VARIOUS PRODUCT USES：High performace for the home and engineering,These flat head screws can used for wood、plasterboard、chipboard、concrete、wall、deck、plastic.

Forgefix,Spectre™ PZ Compatible Advance Multi-purpose Wood Screw 5.0 x 40mm Box 200, black coated finish for excellent resistance to corrosion

Forgefix,Spectre™ PZ Compatible Advance Multi-purpose Wood Screw 5.0 x 40mm Box 200, black coated finish for excellent resistance to corrosion

Perfect for load-bearing applications.
Durable black coated finish.
Quick start type 17 design.

Main Highlights

COUNTERSUNK, pozidrive compatible, recessed head
FULLY threaded, up to 50mm, with a sawtooth thread
SURFACE hardened with a quick start type 17 slash point
BLACK coated finish for excellent resistance to corrosion
CE APPROVED for use in load-bearing timber construction

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Forgefix,Spectre™ PZ Compatible Advance Multi-purpose Wood Screw 5.0 x 40mm Box 200, black coated finish for excellent resistance to corrosion

Perfect for load-bearing applications.
Durable black coated finish.
Quick start type 17 design.

Main Highlights

COUNTERSUNK, pozidrive compatible, recessed head
FULLY threaded, up to 50mm, with a sawtooth thread
SURFACE hardened with a quick start type 17 slash point
BLACK coated finish for excellent resistance to corrosion
CE APPROVED for use in load-bearing timber construction

Heifix Multi-Purpose Wood Screws Pozi Double Countersunk - FREE Screw Bit Included (QTY 200, 4mm x 40mm)

Heifix Multi-Purpose Wood Screws Pozi Double Countersunk - FREE Screw Bit Included (QTY 200, 4mm x 40mm)

Enhanced durability and strength.
Minimizes screwdriver slipping risk.
Smooth and seamless appearance.

Main Highlights

PoziDriv Screw Bit Included
Material: Carbon steel 1022 with yellow zinc plating for enhanced durability and corrosion resistance.
Unique Design: The double countersunk head sits flush with the surface, creating a smooth and seamless appearance.
Enhanced Strength: The double countersunk head is stronger than standard countersunk heads, reducing the risk of breakage.
PZ-Slot Drive: Provides enhanced torque transfer and minimizes the risk of the screwdriver slipping during installation.
Milling Ribs: Located under the head, these ribs prevent the screw from sliding or rotating during installation. They provide additional friction to keep the screw's position stable, even under vibration or impact.
Boxes Of 100 or 200 Screws Available

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Heifix Multi-Purpose Wood Screws Pozi Double Countersunk - FREE Screw Bit Included (QTY 200, 4mm x 40mm)

Enhanced durability and strength.
Minimizes screwdriver slipping risk.
Smooth and seamless appearance.

Main Highlights

PoziDriv Screw Bit Included
Material: Carbon steel 1022 with yellow zinc plating for enhanced durability and corrosion resistance.
Unique Design: The double countersunk head sits flush with the surface, creating a smooth and seamless appearance.
Enhanced Strength: The double countersunk head is stronger than standard countersunk heads, reducing the risk of breakage.
PZ-Slot Drive: Provides enhanced torque transfer and minimizes the risk of the screwdriver slipping during installation.
Milling Ribs: Located under the head, these ribs prevent the screw from sliding or rotating during installation. They provide additional friction to keep the screw's position stable, even under vibration or impact.
Boxes Of 100 or 200 Screws Available

fischer 670246 FPF Power-Fast II 4.0 x 40mm Chipboard Wood Screws, Pan Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

fischer 670246 FPF Power-Fast II 4.0 x 40mm Chipboard Wood Screws, Pan Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

Quick and easy installation.
Environmentally friendly zinc plating.
Time-saving Phillips PZ drive.

Main Highlights

Power-Fast II: the chipboard screw fischer Power-Fast II can be processed quickly and flexibly. Thanks to the screw tip with three ribs, the Power-Fast II screw is easy to attach and mills quickly and easily into the wood. The Power-Fast II is available with different head shapes and with a blue passivated zinc plating, which contains no harmful chrome VI and is therefore very environmentally friendly.
Versatile: the fischer Power-Fast II is universally applicable and quick and easy to install. Whether in different woods and even at small edge distances and with metal fittings, the chipboard screw fischer Power-Fast II can withstand a high load. The chipboard screw Power-Fast II is a screw with tested loads in the fischer dowel (e.g. Duopower and UX). Thanks to the sophisticated technology, the wood with the fischer Power-Fast II breaks significantly less and requires significantly less force when screwing the screw.
Time-saving: the Phillips PZ drive of the fischer Power-Fast II reduces the number of bit changes and makes it easier to screw in. Thanks to the new thread geometry of the fully threaded screw, the screw can be screwed in much faster. The increased thread pitch ensures more safety. Typically fully threaded screws are used for steel-wood joints.
Box contents: 200 x chipboard screws Power-Fast II 4.0 x 40, pan head with cross slot full thread, galvanised, blue passivated (item no. 670246) by fischer.

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fischer 670246 FPF Power-Fast II 4.0 x 40mm Chipboard Wood Screws, Pan Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

Quick and easy installation.
Environmentally friendly zinc plating.
Time-saving Phillips PZ drive.

Main Highlights

Power-Fast II: the chipboard screw fischer Power-Fast II can be processed quickly and flexibly. Thanks to the screw tip with three ribs, the Power-Fast II screw is easy to attach and mills quickly and easily into the wood. The Power-Fast II is available with different head shapes and with a blue passivated zinc plating, which contains no harmful chrome VI and is therefore very environmentally friendly.
Versatile: the fischer Power-Fast II is universally applicable and quick and easy to install. Whether in different woods and even at small edge distances and with metal fittings, the chipboard screw fischer Power-Fast II can withstand a high load. The chipboard screw Power-Fast II is a screw with tested loads in the fischer dowel (e.g. Duopower and UX). Thanks to the sophisticated technology, the wood with the fischer Power-Fast II breaks significantly less and requires significantly less force when screwing the screw.
Time-saving: the Phillips PZ drive of the fischer Power-Fast II reduces the number of bit changes and makes it easier to screw in. Thanks to the new thread geometry of the fully threaded screw, the screw can be screwed in much faster. The increased thread pitch ensures more safety. Typically fully threaded screws are used for steel-wood joints.
Box contents: 200 x chipboard screws Power-Fast II 4.0 x 40, pan head with cross slot full thread, galvanised, blue passivated (item no. 670246) by fischer.

M4 Wood Screws Zinc Plated Long 1.5 inch (0.16" x1.57") 4.0 x 40mm Box of 250pcs

M4 Wood Screws Zinc Plated Long 1.5 inch (0.16" x1.57") 4.0 x 40mm Box of 250pcs

High-quality corrosion-resistant construction.
Perfect for indoor/outdoor use.
Excellent for various materials.

Main Highlights

SIZE – LLB single thread silver wood screws measure 4mm x 40mm / 0.16"x 1.57". Every package includes 250 screws.
QUALITY - Our 4mm thick, silver, zinc electroplated (electrogalvanized) screws are made from high quality steel, where a layer of zinc is bonded to steel in order to protect against corrosion. This makes them sturdy, hard, solid, rust and corrosion resistant for a long time period.
WOOD SCREWS HEAVY DUTY - Our high-quality M4 wood screws can be used indoor or outdoor. Each pack is suitable for use on wood (hardwood / softwood) and for a variety of DIY tasks including furniture repair, fencing construction or as heavy duty screws for any advanced building construction. Product ideal for trade work especially carpenters and joiners.
COUNTERSUNK SCREWS - Great assist in completion of countersinking and reduced probability of head shearing. 25° sharp point created for fast start and 40° deep single thread to provide a secure fixing.
WOOD SCREWS DURABLE & RELIABLE - Our advanced multi purpose screws are specially designed for wood, chipboard, plastic and very thin metal. They have been designed to produce a secure and sturdy fixing, enhanced screw insertion time and extra driving torque. Piercing tip on each screw allows it to be drilled into wood or plastic without the need of a pilot hole in the same time providing high pull-out resistance.

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M4 Wood Screws Zinc Plated Long 1.5 inch (0.16" x1.57") 4.0 x 40mm Box of 250pcs

High-quality corrosion-resistant construction.
Perfect for indoor/outdoor use.
Excellent for various materials.

Main Highlights

SIZE – LLB single thread silver wood screws measure 4mm x 40mm / 0.16"x 1.57". Every package includes 250 screws.
QUALITY - Our 4mm thick, silver, zinc electroplated (electrogalvanized) screws are made from high quality steel, where a layer of zinc is bonded to steel in order to protect against corrosion. This makes them sturdy, hard, solid, rust and corrosion resistant for a long time period.
WOOD SCREWS HEAVY DUTY - Our high-quality M4 wood screws can be used indoor or outdoor. Each pack is suitable for use on wood (hardwood / softwood) and for a variety of DIY tasks including furniture repair, fencing construction or as heavy duty screws for any advanced building construction. Product ideal for trade work especially carpenters and joiners.
COUNTERSUNK SCREWS - Great assist in completion of countersinking and reduced probability of head shearing. 25° sharp point created for fast start and 40° deep single thread to provide a secure fixing.
WOOD SCREWS DURABLE & RELIABLE - Our advanced multi purpose screws are specially designed for wood, chipboard, plastic and very thin metal. They have been designed to produce a secure and sturdy fixing, enhanced screw insertion time and extra driving torque. Piercing tip on each screw allows it to be drilled into wood or plastic without the need of a pilot hole in the same time providing high pull-out resistance.

TERF® Decking Screws 4.0 X 40mm Pozi Drive Flat Countersunk Head Green Finish Anti Corrosion Screws 4.0 X 40mm For Decking Fence Floorboard Hard And Softwood - Pack of 100

TERF® Decking Screws 4.0 X 40mm Pozi Drive Flat Countersunk Head Green Finish Anti Corrosion Screws 4.0 X 40mm For Decking Fence Floorboard Hard And Softwood - Pack of 100

Made of hardened steel.
Green treated corrosion resistance.
Reduces risk of splitting.

Main Highlights

Package Content : 100 Pcs Approx Decking Screw 4.0 X 40mm ★【 Note 】:- Before Buy Please Check Your Require Screw Size
Material : Made of Hardened Steel
Single threaded decking screws have pozidriv heads
Green treated corrosion resistance
Design reduces risk of splitting the boards
Allows boards to expand and contract with the changing seasons
Specifically used in Decking applications but also widely used in exterior timber and fencing applications
Please make your selection from the drop down menu. Image is for illustrative purposes

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TERF® Decking Screws 4.0 X 40mm Pozi Drive Flat Countersunk Head Green Finish Anti Corrosion Screws 4.0 X 40mm For Decking Fence Floorboard Hard And Softwood - Pack of 100

Made of hardened steel.
Green treated corrosion resistance.
Reduces risk of splitting.

Main Highlights

Package Content : 100 Pcs Approx Decking Screw 4.0 X 40mm ★【 Note 】:- Before Buy Please Check Your Require Screw Size
Material : Made of Hardened Steel
Single threaded decking screws have pozidriv heads
Green treated corrosion resistance
Design reduces risk of splitting the boards
Allows boards to expand and contract with the changing seasons
Specifically used in Decking applications but also widely used in exterior timber and fencing applications
Please make your selection from the drop down menu. Image is for illustrative purposes

ForgeFix Multi-Purpose Single Thread Screws | 5.0 x 40mm | Zinc Yellow Passivated | Box 200

ForgeFix Multi-Purpose Single Thread Screws | 5.0 x 40mm | Zinc Yellow Passivated | Box 200

Increased holding power for MDF.
Quicker and easier insertion.
Ideal for various substrates.

Main Highlights

Single thread multi-purpose woodscrews
Ideal for fixing into a range of substrates including softwoods, hardwoods, chipboards and fibreboards
Quicker and easier insertion thanks to an extra deep insert bit recess, which enables a firmer positive drive
Single thread and special wax coating also increases speed and ease of insertion
Single thread design provides increased holding power particularly when used with particle boards like MDF

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ForgeFix Multi-Purpose Single Thread Screws | 5.0 x 40mm | Zinc Yellow Passivated | Box 200

Increased holding power for MDF.
Quicker and easier insertion.
Ideal for various substrates.

Main Highlights

Single thread multi-purpose woodscrews
Ideal for fixing into a range of substrates including softwoods, hardwoods, chipboards and fibreboards
Quicker and easier insertion thanks to an extra deep insert bit recess, which enables a firmer positive drive
Single thread and special wax coating also increases speed and ease of insertion
Single thread design provides increased holding power particularly when used with particle boards like MDF

fischer 670091 FPF Power-Fast II 3.5 x 40mm Chipboard Wood Screws, Countersunk Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

fischer 670091 FPF Power-Fast II 3.5 x 40mm Chipboard Wood Screws, Countersunk Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

Reduces installation time significantly.
Ensures quick bite and pre-drilling.
Designed to reduce torque.

Main Highlights

The increased thread pitch significantly reduces the installation time.
The three ribs on the tip, ensure a quick bite and pre-drilling.
The shank-miller in combination with the core-miller geometry is designed to reduce the installation torque.
The Power-Fast II is suitable for use with fischer plugs (E.g DUOPOWER and UX) and recommended loads.

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fischer 670091 FPF Power-Fast II 3.5 x 40mm Chipboard Wood Screws, Countersunk Head with Phillips, Fully Threaded, Galvanised Blue Passivated, Box of 200

Reduces installation time significantly.
Ensures quick bite and pre-drilling.
Designed to reduce torque.

Main Highlights

The increased thread pitch significantly reduces the installation time.
The three ribs on the tip, ensure a quick bite and pre-drilling.
The shank-miller in combination with the core-miller geometry is designed to reduce the installation torque.
The Power-Fast II is suitable for use with fischer plugs (E.g DUOPOWER and UX) and recommended loads.

TIMCO Solo Chipboard & Woodscrews - PZ - Double Countersunk - Yellow - 6.0 x 40mm - Box of 200

TIMCO Solo Chipboard & Woodscrews - PZ - Double Countersunk - Yellow - 6.0 x 40mm - Box of 200

Enhanced durability and longevity.
Quick installation with precision.
Strong holding power guaranteed.

Main Highlights

Double countersunk reduces the likelihood of head shear and assists completion of countersinking
Wax lubricated to enhance screw insertion time, extra driving torque and resistance to corrosion
40° deep single thread to provide a secure fixing with high pull-out resistance
25° sharp point and single lead for a fast start and improved thread acceptance
All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length

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TIMCO Solo Chipboard & Woodscrews - PZ - Double Countersunk - Yellow - 6.0 x 40mm - Box of 200

Enhanced durability and longevity.
Quick installation with precision.
Strong holding power guaranteed.

Main Highlights

Double countersunk reduces the likelihood of head shear and assists completion of countersinking
Wax lubricated to enhance screw insertion time, extra driving torque and resistance to corrosion
40° deep single thread to provide a secure fixing with high pull-out resistance
25° sharp point and single lead for a fast start and improved thread acceptance
All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length

We scanned 449 products

We reviewed these offers relevant to the Heavy Duty Wood Screws 40mm within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like brackit, TOPYWMSP, Forgefix, Heifix, fischer, LLB, TERF, TIMCO, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Heavy Duty Wood Screws 40mm in the market, we considered we took a deep dive into 2246 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Brackit Wood Screws 820Pc Assortment - Zinc-Plated Extra Strong Countersunk Pozi Drive Head Wood Screw Set – For Floorboard,Wood Fences, Large Screw Set. We love many things about this product by brackit. What sets it apart from the competition is Solid plastic storage box, Screws for multiple materials, Ideal for DIY tasks.
The best value product for most shoppers and where user satisfaction is continuously the highest is 4x40mm Wood Screws,Flat Head Screws for Wood, Zinc Galvanized,Multi Purpose Screws (100pcs) by TOPYWMSP based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Heavy Duty Wood Screws 40mm and the best cost-to-value ratio is TIMCO Solo Chipboard & Woodscrews - PZ - Double Countersunk - Yellow - 6.0 x 40mm - Box of 200at TIMCO with a 27% discount.
Our list of the best Heavy Duty Wood Screws 40mm is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.