5mm (No.10) x 40mm Pozi Countersunk Wood Screw, A2 Stainless Steel, DIN 7997

Corrosion resistant wood screw

Corrosion resistant 5 x 40mm Pozi countersunk wood screw manufactured from A2 stainless steel for excellent corrosion resistance, making it perfect for both indoor and outdoor applications.

Manufactured with a Pozi, countersunk head that ensures easy installation with reduced cam-out and a clean flush finish every time. Ideal for applications where aesthetics is a consideration.

Combined with a shank for strength and a thick thread for high pull-out resistance, sees these stainless-steel wood screws widely used by DIY enthusiasts and professionals alike. 

Often used for general joinery & carpentry (both indoors and out), cabinet fitting, timber cladding, and garden furniture.

40mm countersunk wood screw specifications

• Diameter (TD): 5mm (No.10)
• Length (L): 40mm
• Thread length (TL): Approx 24mm
• Drive type: Pozi - 2
• Head width (HW): 9.65mm max
• Material: A2 stainless steel
• Standard: DIN 7997
  

40mm countersunk wood screw benefits

• A2 Stainless Steel for high corrosion resistance
• Countersunk head for a flush finish every time
• Pozi drive recess for reduced cam-out during installation
• Suitable for a variety of materials, including wood, chipboard, and MDF
  
• Versatile uses for both indoor and outdoor applications
  

Part of a larger range of wood screws from Fusion Fixings. Quantities start from just one to as many as you need to get the job done, with bulk price discounts.

Installation Tip

To avoid splitting softer wood, consider pre-drilling a small pilot hole that’s slightly smaller than the screw diameter and use a Pozi-compatible driver bit for best results.

Frequently asked questions about countersunk wood screws

Can I use these screws outdoors or in marine environments?

These screws are manufactured in A2 stainless steel offering a high level of corrosion-resistant, making these screws suitable for both internal and external projects. For areas near salt water and marine environments, A4 stainless steel is recommended for longer lasting results.

Do stainless steel screws ever rust?

Stainless steel screws are far more rust-resistant than plated or coated fasteners because the metal is uniform throughout and not just surface treated. 

What size pilot hole should I drill?

For hardwoods, a pilot hole slightly smaller than the screw diameter is recommended. For softwoods, the pilot hole can be narrower or sometimes skipped.

Are A2 stainless slotted screws magnetic?

No, A2 stainless steel screws are typically non-magnetic or only slightly magnetic after cold working.

Can you use stainless wood screws in outdoor, treated, or tannin-rich woods (like cedar/redwood)?

Yes, stainless steel is recommended in treated lumber and tannin-rich woods to prevent staining and corrosion. For coastal areas, A4 stainless steel is the best which offers as much higher level of corrosion resistance. 

How do stainless fasteners compare in strength to other steels?

A2 stainless steel offers high corrosion resistance needed for external use, but it is generally not as hard or high tensile as carbon steel. Stainless steel screws are still more than adequate for most wood fixing jobs.

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