42mm Wafer Head Cement Board Screw Self-Drilling (200/Box)
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Wed 29 Oct
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- 12hrs
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Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Screws & Fixings and Adhesives & Sealants | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
| Insulation, Plasterboard and Drylining Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{foundation}} Ideal for attaching cement boards to steel structures
- {{minimize}} Wafer head ensures a flush finish
- {{power_input}} Countersinking ribs under the screw head
- {{update}} Self-drilling point eliminates the need for pre-drilling
Technical Specification
| Length: | 42mm |
|---|---|
| Box Quantity: | 200 |
| Sales Unit: | Box |
| Collated: | No |
| Diameter: | 4.2mm |
| Head Type: | Wafer |
| Drive Type: | Phillips |
| Thread Type: | Self-Tapping |
| Thread Length: | Fully Threaded |
Product Overview
Wafer Head Cement Board Screws with a 42mm length. Precision-engineered self-drilling fasteners for securely fixing cement-based boards to steel framing.
Each screw features a self-drilling point capable of penetrating steel sections up to 3mm thick without pre-drilling, offering a clean, controlled drive.
The wide wafer head ensures even pressure distribution across the cement board surface, reducing the risk of cracking or surface damage during installation.
Countersinking ribs beneath the head regulate seating depth, producing a flush, professional finish. Manufactured for use with cement boards such as HardieBacker and similar sheet materials, these screws combine high performance with reliable, consistent results in both residential and commercial applications.
The 42mm length offers deeper engagement, providing secure fixing for medium to heavy board thicknesses.
Features & Benefits
- Self-drilling point: Penetrates steel up to 3mm thick without the need for pre-drilling, streamlining installation and reducing on-site preparation time.
- Wafer head design: Broad, low-profile head distributes pressure evenly across the board surface, preventing damage and ensuring stable fixing.
- Countersinking ribs: Allow the screw head to sit flush with the board, delivering a neat and uniform finish while preventing over-driving.
- Fully threaded shank: Provides maximum holding power in steel frames, maintaining a secure, vibration-resistant connection.
- Phillips drive compatibility: Enables quick and easy installation using standard tools, improving work efficiency.
- Durable construction: Manufactured for long-term strength and resistance to wear, suitable for demanding construction environments.
- Size – 42mm length: Provides secure fixing for medium to heavy cement boards, ensuring full penetration and superior hold.
Applications
- Steel-to-cement board fixing: Designed for attaching cement boards to steel studs, channels, and dry-lining frames.
- Partition wall systems: Used in cladding, partitioning, and lining systems requiring firm cement board-to-steel fastening.
- Interior and exterior installations: Suitable for both commercial and domestic construction where cement board lining is required.
Installation Guidance
- Preparation: Ensure the substrate is clean, level, and free of debris before fixing.
- Tool compatibility: Use a standard Phillips drive power tool with appropriate torque control.
- Driving method: Align screw perpendicular to the board surface; allow the self-drilling point to penetrate without excessive pressure.
- Seating control: Drive until the wafer head sits flush; do not over-tighten to avoid damaging the board.
Compliance & Performance
- Material specification: Hardened carbon steel with corrosion-resistant coating for extended service life.
- Performance standard: Designed to meet trade performance criteria for cement board fixing to light-gauge steel framing.
- Load performance: Optimised thread geometry ensures reliable tensile and shear strength under static and dynamic loads.
- Safety note: Always wear eye protection when drilling or driving screws; ensure power tools are used in accordance with manufacturer guidance.
- Important note: Not suitable for use in heavy-gauge or structural steel sections exceeding 3mm thickness.
