Samac Fixings Performance Exterior Screws - Black Countersunk Box

Samac Fixings Performance Exterior Screws – Black Countersunk (Box)

Samac Fixings Performance Exterior Screws are designed for strong, reliable fixing in outdoor and exposed environments. Finished with a black countersunk coating, these screws provide a discreet, professional finish that blends neatly with darker timbers and external fixtures.

Ideal for fencing, decking sub-frames, landscaping, and general exterior joinery, these screws combine durability with smooth, controlled installation. Supplied in convenient boxed quantities, they are suitable for both trade professionals and serious DIY use.

Durable Black Exterior Finish

The black corrosion-resistant coating helps protect the screw against moisture and weathering, extending service life when used outdoors. The countersunk head allows the screw to sit flush with the timber surface, delivering a clean finish and reducing the risk of snagging.

Engineered for consistent performance, these exterior screws offer dependable holding strength across a wide range of softwood and hardwood materials commonly used in outdoor construction.

Available Sizes & Pack Quantities

4.0mm Diameter

• 25mm – Box of 200
• 30mm – Box of 200
• 40mm – Box of 200
• 50mm – Box of 200

5.0mm Diameter

• 30mm – Box of 200
• 40mm – Box of 200
• 50mm – Box of 200
• 70mm – Box of 100
• 80mm – Box of 100
• 100mm – Box of 100

FAQs

What are black exterior screws typically used for?

They are commonly used for fencing, decking frames, landscaping projects, and exterior joinery where a darker, less visible fixing is preferred.

Are these screws suitable for outdoor use?

Yes, the black corrosion-resistant coating is designed to protect against moisture and weathering in external environments.

Do these screws sit flush once installed?

Yes, the countersunk head design allows the screws to sit neatly flush with the timber surface for a clean, professional finish.

Check out our other products here.

Explore more from our range here.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.