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Window Construction Screw | Hardened Steel | Zinc-Plated | Full Thread | @Pack of 500 | by Wurth
The ASSY®plus 4 FBS RCS window construction screw is designed for reliable fastening in window construction, featuring a hardened steel body and zinc-plated finish for durability. With a full thread and raised countersunk head, it ensures gap-free installation without pre-drilling, making it ideal for both professional tradespeople and DIY enthusiasts. Perfect for mounting metal fittings to timber windows and furniture assembly.
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Product Name/Title: Window Construction Screw | Hardened Steel | Zinc-Plated | Full Thread | @Pack of 500 | by Wurth
Brand: Wurth
SKU: 178744040
Alternatively Known As: Window construction screw, timber window screw, zinc-plated wood screw, raised countersunk head screw, full thread wood screw
Technical Specifications
- Material: Hardened steel
- Surface: Zinc plated
- RoHS-compliant: Yes
- Nominal diameter: 4 mm
- Length: 40 mm
- Head diameter: 7 mm
- Head height: 1.6 mm
- Internal drive: RW20
- Thread length: 30 mm
- Screw-thread length with drill tip: 33.5 mm
- Head type: Raised countersunk head with restraining ribs
- Thread type: Wood screw thread, full thread, single start
- Core diameter: 2.5 mm
- Tip shape: Drilling tip
- Min screw-in angle: 0 degrees
- Max screw-in angle: 90 degrees
- Suitable materials: Board ply wood, wood, derived timber products, hardwood, LVL, softwood, construction timber, OSB, chipboard, solid wood panel
- Area of application: Windows, fittings, furniture
- Approval: ETA-11/0190
- Declaration of performance (EU-CPR): Yes
- Dimensions (H x L x W): 1.6mm x 40mm x 7mm
- Weight: 0.00225 kg
Key Features
- Full threaded screw with raised countersunk head and restraining ribs for gap-free fastening close to edges
- Suitable for mounting metal fittings to timber windows without pre-drilling
- Ideal power transmission with RW drive and larger contact area at the bit
- One-handed working with precise positioning due to tight-fit recess and perfect bit fit
- Compatibility with previous AW drive
- Lens-shaped, rounded head for visually appealing window fitting connections
- Spring-loaded effect of restraining ribs prevents screw overturning and head damage
- Asymmetrical single thread for maximum reliability
- Optimal matching of drill tip and thread geometry
- Excellent anchoring in wood due to asymmetrical thread flanks
- Small edge distances possible with wedge-shaped drill tip and parallel cutting edges
- Assembly without gaps, preventing wood splitting and rupture
Professional Installation Requirements
- Installation by a professional or experienced tradesperson is recommended to ensure proper fastening and structural integrity.
Applications
- Window construction
- Mounting metal fittings to timber windows
- Furniture assembly
Standards & Compliance
- AS/NZS 1170 – Structural Design Actions (Wind, Earthquake, Snow Loads)
Environmental Benefits
- RoHS-compliant material ensuring reduced hazardous substances
- Durable hardened steel construction extends product life reducing waste
Warranty Information
Warranty details available upon request from Wurth; typically covered against manufacturing defects.
Available Now
Available for immediate purchase, ideal for window construction and timber fastening applications.
