Surefix Screws / Superscrews
Premium Timber Screws for Exterior, Construction & General Timber Applications
Mainland Fasteners supplies high-performance Surefix Screws and Superscrews designed for fast installation, strong clamping performance, and long-term durability across timber construction applications. Engineered for professional builders, deck installers, fencing contractors, cabinet makers, and general trades, these advanced wood screws are suitable for both interior and exterior timber fastening.
Surefix Superscrews are available in a range of finishes including 304 Stainless Steel, Galvanised, and Yellow Zinc Chromate to suit different construction environments and timber applications throughout New Zealand.
Featuring hardened points, self-drilling capability, coarse thread geometry, and countersinking ribs beneath the head, Surefix Screws provide efficient installation into timber without requiring pilot holes in many applications.
Surefix Superscrew Features & Benefits
Surefix Screws are engineered to improve installation speed and fastening performance across a wide range of timber and construction applications.
- Self Drilling & Self Tapping Design: Reduces or eliminates the need for pilot holes in many timber applications.
- Extra Sharp Hardened Point: Improves penetration into timber while reducing installation effort.
- Extra Coarse Thread: Provides strong timber grip and high clamp loads.
- Countersunk Head: Delivers a clean, flush finish to the timber surface.
- Ribs Under Head: Assists self-countersinking during installation.
- Square Drive, Pozi Drive & Multi Drive Options: Designed for reliable bit engagement and reduced cam-out.
- 15 TPI Thread Design: Engineered for efficient timber fastening performance.
- Hardened Thread & Point: Makes driving easier, particularly in dense timber.
Available Finishes & Applications
Surefix Superscrews are available in multiple finishes to suit interior, exterior, and construction fastening applications.
| Finish | Application | Key Benefits |
|---|---|---|
| 304 Stainless Steel | Exterior timber construction, decking, fencing, and coastal applications. | High corrosion resistance and long-term durability. |
| Galvanised | General exterior timber work and structural batten applications. | Improved corrosion protection for outdoor construction. |
| Yellow Zinc Chromate | Interior MDF, chipboard, and particle board fastening. | Durable coating with improved corrosion resistance for indoor environments. |
304 Stainless Steel Surefix Screws
The 304 Stainless Steel Surefix Screw range is specifically designed for exterior timber fastening applications where corrosion resistance and long-term durability are important. Common uses include decking, fencing, landscaping, and general outdoor timber construction.
- Suitable for Exterior Applications: Including coastal zones and exposed outdoor environments.
- Countersunk Head: Provides a clean flush finish.
- Self Drilling Design: Fast installation into timber.
- High Corrosion Resistance: Ideal for long-term outdoor use.
- Hardened Point & Thread: Easier driving performance into timber.
Care should be taken when fastening close to timber edges to minimise splitting in harder timber species.
Yellow Zinc Surefix Screws for MDF & Particle Board
Yellow Zinc Surefix Screws are designed for fastening MDF, particle board, and chipboard substrates in interior applications. Their coarse thread and countersinking design provide strong holding performance while maintaining a clean flush finish.
- Suitable for MDF & Chipboard
- Designed for Interior Use
- Square Drive Installation
- Yellow Zinc Chromate Finish
- Fast Self Tapping Installation
Surefix Screw Construction & Technical Design
Surefix Superscrews are designed to combine efficient installation with strong timber fastening performance.
| Feature | Benefit |
|---|---|
| Hardened Point | Improves timber penetration and reduces installation effort. |
| Self Tapping Thread | Minimises the need for pilot holes in timber applications. |
| Extra Coarse Thread | Provides strong holding performance and clamp load. |
| Countersunk Head | Creates a flush finish in timber surfaces. |
| Ribs Under Head | Assists countersinking and reduces surface breakout. |
| Square / Pozi Drive | Improves drive engagement and installation reliability. |
Surefix Screw Sizes
Square Drive
Square Drive Surefix Screws are commonly used across timber construction, cabinetry, particle board, and general building applications.
| 8 x 3/4 | 10 x 2 1/2 |
| 8 x 1 | 10 x 3 |
| 8 x 1 1/8 | 10 x 4 |
| 8 x 1 1/4 | |
| 8 x 1 1/2 | |
| 8 x 1 5/8 | |
| 8 x 1 3/4 | |
| 8 x 2 | |
| 8 x 2 1/2 | |
| 8 x 3 |
Pozi Drive
Pozi Drive Surefix Screws are designed for smooth installation and reliable engagement across timber and board fastening applications.
| 6 x 1/2 | 8 x 5/8 | 10 x 2 1/2 |
| 6 x 5/8 | 8 x 3/4 | 10 x 3 |
| 6 x 3/4 | 8 x 1 | |
| 6 x 1 | 8 x 1 1/8 | |
| 6 x 1 1/4 | 8 x 1 1/4 | |
| 6 x 1 1/2 | 8 x 1 1/2 | |
| 8 x 1 5/8 | ||
| 8 x 1 3/4 | ||
| 8 x 2 |
Typical Applications
Surefix Superscrews are suitable for a broad range of timber fastening applications across residential, commercial, and construction projects.
- Decking: Exterior timber decking installation and fastening.
- Fencing: General timber fencing and retaining construction.
- Timber Construction: Structural and non-structural timber fastening applications.
- Cabinetry & Joinery: MDF, particle board, and chipboard fastening.
- Landscaping: Outdoor timber and garden structure assembly.
- General Building: Timber fixing for builders, carpenters, and trades.
Nationwide Supply Across New Zealand
From our Christchurch warehouse, Mainland Fasteners supplies Surefix Screws and Superscrews throughout New Zealand with fast nationwide shipping available across both the North Island and South Island.
Whether you require stainless timber screws for exterior construction, galvanised screws for outdoor timber work, or zinc-coated screws for cabinetry and board fastening, our team can assist with product selection and supply.
Frequently Asked Questions
What are Surefix Screws?
Surefix Screws, also known as Superscrews, are hardened timber screws designed for fast installation, strong timber grip, and reduced pre-drilling requirements across timber construction applications.
Are Surefix Screws suitable for exterior use?
Yes. The 304 Stainless Steel and Galvanised Surefix Screw ranges are designed for exterior timber applications including decking, fencing, and outdoor construction work.
Do Surefix Screws require pilot holes?
In many timber applications, pilot holes are not required due to the hardened self drilling point and self tapping thread design. Care should still be taken near timber edges and with dense hardwoods.
What is the difference between stainless steel and zinc-coated Surefix Screws?
304 Stainless Steel Surefix Screws are designed for exterior and coastal environments where corrosion resistance is important, while Yellow Zinc Chromate screws are generally intended for interior board fastening applications.
What drive types are available?
Surefix Superscrews are available in Square Drive, Pozi Drive, and Multi Drive configurations depending on the application and screw type.
What are Surefix Screws commonly used for?
Common applications include decking, fencing, timber framing, cabinetry, particle board fastening, landscaping, and general timber construction.
Do you supply Surefix Screws throughout New Zealand?
Yes. Mainland Fasteners supplies Surefix Screws and Superscrews nationwide from our Christchurch warehouse.
Are Surefix Screws suitable for MDF and particle board?
Yes. Yellow Zinc Surefix Screws are specifically designed for MDF, chipboard, and particle board fastening in interior applications.
Request a Quote
To discuss pricing, product availability, or technical information for Surefix Screws and Superscrews, contact the Mainland Fasteners team today. We can assist with timber screw selection for construction, decking, cabinetry, and general fastening applications throughout New Zealand.
