Stainless Steel Black Coated Screws 40mm x 100

Stainless Steel Black Fixing Screws for Composite Slatted Cladding – Square Head (Pack of 100)
Durable, Weather-Resistant Screws with Included Square Drive Bit for a Seamless Finish

Achieve a secure, clean, and professional composite installation with our Stainless Steel Black Fixing Screws – Square Head (Pack of 100). Specially engineered for use with composite cladding and decking systems, these high-performance screws offer superior corrosion resistance, strength, and long-term outdoor durability – all in a sleek black finish designed to blend effortlessly with dark-toned composite boards.

Each screw features a square head for better torque control and reduced cam-out, making installation smoother and more reliable. To make your job even easier, every pack includes a matching square-head driver bit, so you're ready to install straight out of the box.

The countersunk design ensures a flush, discreet fit that maintains the clean lines of your composite boards while offering maximum holding power. Ideal for both DIYers and trade professionals, these screws deliver the reliable performance you need on every job.

Key Features:

• Pack Size: 100 screws + 1 square-head drill bit

• Material: Premium stainless steel with black weather-resistant coating

• Colour: Black – perfect for use with charcoal, anthracite, and darker composite boards

• Head Type: Square drive, countersunk – for a flush, low-profile finish and easy installation

• Corrosion Resistant: Ideal for long-term outdoor exposure

• Application: Designed specifically for composite cladding and decking systems

• Compatibility: Works seamlessly with all products in the Majestic composite range

Why Choose Our Black Square-Head Composite Screws?

• Strong, rust-resistant stainless steel construction for longevity

• Black coated finish blends perfectly with modern composite tones

• Square head ensures better grip, reduced slipping, and a cleaner install

• Includes matching square-head drill bit – no need to source separately

• Delivers a neat, professional finish across both vertical and horizontal installations

Whether you're installing composite cladding on an exterior wall or laying a new deck, these black square-head fixing screws give you the durability, performance, and polished look your project deserves.

Built to last. Designed to blend. Finished to perfection.

Also available in 30mm

Choose 30mm Torx-head screws in black or with colour-matched heads and silver stainless steel shafts. All 30mm packs contain 100 screws and a free matching Torx driver bit. These 40mm black screws have a square head and include the matching square driver bit.

View 30mm black screwsView 30mm colour-matched screws

Need an exact measurement? Contact our team before ordering and we will confirm the dimensions for this product.