Decking Screws - Square and Torx Drive Screws

Decking Screws for Timber and Composite Decks

Building a deck? The screws you choose will determine how it looks in five years and whether it stays tight in ten. We stock decking screws in square drive and Torx drive across a range of gauges and lengths, suited to treated pine, hardwood, and composite boards. With delivery across Sydney, the Blue Mountains, Wollongong, and the Central Coast, getting the right fixings on-site is straightforward.

Square Drive vs Torx Drive

Drive type is a practical choice, not just a preference. Square drive screws (also called Robertson drive) are widely used on Australian decks and offer good cam-out resistance with most cordless drivers. They are a reliable choice for treated pine and budget-friendly composite boards.

Torx drive screws (six-point star drive) provide better torque transfer and are preferred by tradies running high-speed drills on volume deck jobs. They strip less under load and produce a neater finish, which is why they are the go-to for hardwood and premium composite decking. Both drive types come with Class 3 coating as standard for sheltered builds, with Class 4 and 316 stainless options for coastal or high-exposure environments.

For structural framing and joinery that runs alongside your deck build, our broader range of timber screws covers the full head type selection. Back to the screws category for a full overview.

[ links: ‘timber screws’  →  /screws/timber-screws/  |  ‘screws category’  →  /screws/ ]

Why Buy From Blacktown Building Supplies?

Why shop with Blacktown Building Supplies:

• Fast delivery across Sydney and beyond: We deliver to Sydney, the Blue Mountains, Wollongong, and the Central Coast. Order online and we will take care of the rest.
• Click and collect from Arndell Park: Order online and pick up from our Western Sydney warehouse at a time that suits you.
• Trade pricing and bulk packs available: Competitive pricing for tradies and contractors, with bulk packs across most product lines. Ask us about a trade account.
• Huge range, one supplier: Fasteners, timber, sheet products, cladding, doors, and cement, all under one roof. Sort the whole job without switching suppliers.
• Australian-owned family business: Based in Western Sydney, we have been serving tradies and homeowners for years. Real people, real stock, real advice.
• Order online 24/7: Browse the full range, check stock, and place your order any time. Pickup or delivery, we will have it sorted.

Yes We Can.

Not sure on drive type or coating class for your project? Call us on 1300 554 775 or get a fast online quote and we will point you in the right direction.