AnchorMark HS Decking Screw

Starting From Just $264.00

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SKU: GHT-AM-5033 Category: Hardware & Accessories Brand: AnchorMark Colour: Stainless, Black Product Brand: AnchorMark

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Product Description

AnchorMark HS Timber Decking Screws are high-quality.

stainless steel screws.

fasteners made for reliable, durable outdoor deck construction. Ideal for hardwood, treated pine, and composite decking boards, they deliver a firm hold and dependable fixing strength. Their corrosion-resistant design helps them withstand harsh weather while providing a neat, professional-looking finish.

Sold through Greenhill Timbers in Thomastown, these screws are a practical choice for tradespeople and landscapers. They also suit home renovators and customers across Melbourne’s northern suburbs.

Every pack includes 1,000 screws, suitable for residential builds and larger commercial decking jobs.

Key Features & Benefits

Manufactured from 304 stainless steel decking grade for high weather resistance
Also available in 316 stainless steel (black finish) for coastal and high-exposure environments
Self-drilling tip for faster, easier decking installation
Reduces the need for pre-drilling in most timber applications
Precision drill point helps prevent timber splitting and board damage
Small head diameter for a discreet, professional finish
Underhead pockets allow smooth, clean countersinking

Designed for consistent fastening performance in hardwood and composite boards

Ideal for Hardwood & Composite Decking

AnchorMark HS decking screws are engineered for Australian outdoor conditions, offering excellent corrosion resistance in exposed environments.

Whether you install spotted gum, merbau, treated pine, or composite decking boards, these stainless steel decking screws offer a strong grip. They also deliver long-term structural performance.

Perfect for:

Residential decking projects
Commercial outdoor spaces
Pool surrounds
Alfresco areas
High-moisture environments

304 vs 316 Stainless Steel Decking Screws

304 Stainless Steel – Suitable for general outdoor decking applications.
316 Stainless Steel (Black Finish) – Recommended for coastal areas, high-humidity zones and projects requiring maximum corrosion resistance.

Choosing the correct stainless steel grade ensures your decking installation remains secure and rust-resistant for years to come.

Product Specifications

Stainless steel construction
1,000 screws per box
Suitable for timber decking and composite decking
Available in 304 stainless steel
Available in 316 stainless steel (black finish)
Designed for outdoor decking installations

Janka Rating

What Is the Janka Rating?

The Janka rating is a way to measure how hard a timber is, specifically, how much force it takes to push a small steel ball halfway into the wood. The number you get is shown in kilonewtons (kN). A higher Janka score means a harder, more durable timber. Builders and floor installers use it to work out which timbers hold up better in busy areas.

Here’s a rough guide to how some timbers sit on the scale:

Brazilian Walnut – around 16.0 kN
Spotted Gum – roughly 11.0 kN
Tasmanian Oak – about 5.5 kN
Radiata Pine – close to 3.0 kN

Keep in mind: these values can vary depending on moisture content and grain direction.

It's One Part of the Decision

Hardness is useful to know, but it’s just one factor. Janka doesn’t tell you how a timber reacts to heat or humidity, how stable it is, or how easy it is to cut and install.

Some of the hardest woods can be difficult to work with. Others, even if softer, might be more stable or forgiving on-site.

At Greenhill Timbers, we look at the whole picture, not just the numbers. All our timbers are structurally graded and covered by a 25-year guarantee. We'll help you pick something that works for your project, not just on paper.

Delivery Options

Melbourne-Wide Delivery

We carefully prepare your order and organise pick-up or delivery that suits your schedule, ensuring your satisfaction when you choose to purchase from us. If you're located in Melbourne and its surrounding areas, you can collect your order from our Thomastown Showroom at 170 Settlement Road. Otherwise, we can facilitate delivery by leveraging our strong partnerships with various sub-contractors to get you the most competitive delivery rate and suitable time frame. For more information, get in touch with us.

Customer Reviews

Why Choose Us

Get Your Timber Packed

We pack, wrap and load your products into your vehicle on-site. As a Green Hill customer, you won’t have to pack your timber or lug it into your vehicle after you’ve purchased it.

One Stop Shop

We are a one-stop shop for all your timber needs. Get dozens of types of wood, both imported and local, and the right cuts for your decking, flooring, cladding and fencing projects.

Competitive Pricing

In most cases, we can help you save hundreds or even thousands of dollars on the same materials compared to other timber suppliers.

Expert Staff

Our expert staff will assist you in finding the perfect timber to match your projects based on a relaxed chat to find what you need.

Transparent Quotes

We give you the whole picture when we quote you. So you can avoid any nasty surprises down the line.