Classic A4 Stainless Steel Countersunk Wood Screws

About Classic A4 Stainless Steel Countersunk Screws

Classic A4 Stainless Steel Countersunk Wood Screws are multi-purpose fixings manufactured from marine grade A4 stainless steel, offering the highest level of corrosion resistance within the Classic range.

They’re designed for use in coastal locations, exposed external environments and highly corrosive conditions, where standard plated screws or A2 stainless steel may not provide sufficient long-term protection.

Designed for Corrosive and Coastal Environments

A4 stainless steel screws are recommended where fixings are exposed to:

• Coastal or marine air
• High moisture or humidity
• External applications with regular weather exposure
• Corrosive timbers such as green oak
• Environments where staining or rust must be avoided

Classic A4 Countersunk Screws retain the proven Classic multi-purpose design while delivering superior resistance to corrosion and material degradation.

Suitable for Multiple Materials

These screws are suitable for fixing into:

• Softwood
• Hardwood (pre-drilled where required)
• Chipboard and MDF
• Plastics
• Thin sheet metal

Using stainless steel fixings is essential where the base material has inherent corrosive characteristics or where environmental conditions could compromise standard fixings.

Key Design Features

Classic A4 Stainless Steel Countersunk Screws combine durable materials with practical fixing features:

• Double countersunk head to assist smooth countersinking and reduce the likelihood of head shear
• 40° deep single thread to provide secure fixing with good pull-out resistance
• Single slash point (25mm and above) to reduce driving torque and help minimise timber splitting when fixing close to edges
• Marine grade A4 stainless steel construction for exceptional corrosion resistance

All sizes up to and including 75mm are fully threaded, while 80mm and above feature a 70mm thread length, helping balance drive performance and fixing strength in thicker materials.

Where A4 Stainless Countersunk Screws Are Best Used

These screws are particularly well suited to:

• Coastal and marine-exposed installations
• External joinery and timber construction
• Fixing into green oak and other corrosive timbers
• See you want long-term durability without staining
• Applications where a clean, flush finish is required

For internal or sheltered environments, A2 stainless steel screws may be sufficient. For harsh external exposure, A4 provides the highest level of protection.

Trusted Timco Quality

Classic A4 Stainless Steel Countersunk Wood Screws are supplied by Timco and manufactured to deliver consistent, dependable trade performance in demanding environments.

Browse our range to find the right size for your application.