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Window Screw ASSYplus 4 Fbs Rcs Hardened 25mm Wurth

BRAND: Wurth
SKU: 178744025
$280.70 List price: $352.80
1000 PCS ($0.28 per PCS)
+ −
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Wurth Window Construction Screw ASSYplus Fbs Rcs features Hardened steel, Zinc plated and 4mm. Fewer bit changes, one bit for many screw diameters.
Technical Specifications
  • Material: Hardened steel
  • Surface: Zinc plated
  • RoHS-compliant: Yes
  • Nominal diameter (d): 4 mm
  • Length (l): 25 mm
  • Head diameter (d h): 7 mm
  • Head height (k): 1.6 mm
  • Internal drive: RW20
  • Thread length (lg): 18 mm
  • Screw-thread length with drill tip (b): 21.5 mm
  • Head type: Raised countersunk head
  • Head details: Restraining ribs
  • Thread type: Wood screw thread
  • Thread design: Full thread
  • Thread form: Single start thread
  • Core diameter: 2.5 mm
  • Shape of tip: Drilling tip
  • Min. screw-in angle: 0 Degree
  • Max. screw-in angle: 90 Degree
  • Suitable materials: Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood, Construction timber (KVH), OSB, Chipboard, Solid wood panel (SWP)
  • Approval: ETA-11/0190
  • Declaration of performance (EU-CPR): Yes
  • Dimensions (H x L x W): 1.6mm x 25mm x 7mm
  • Weight: 1.473 kg
Key Features
  • Full threaded screw with raised countersunk head and restraining ribs for gap-free fastening close to edges.
  • Mounting of metal fittings to timber windows without pre-drilling the wood.
  • Ideal power transmission thanks to RW drive with larger contact area at the bit.
  • More stability, one-handed working, precise positioning due to tight-fit recess and perfect fit of the bit.
  • Fewer bit changes, one bit for many screw diameters.
  • Compatibility with previous AW drive.
  • Visually appealing connections in window construction with lens-shaped, rounded head.
  • Spring-loaded effect of restraining ribs prevents screw overturning and head damage.
  • Maximum reliability due to asymmetrical single thread.
  • Optimal matching of drill tip and thread geometry.
  • Excellent anchoring in wood due to asymmetrical arrangement of thread flanks.
  • Small edge distances possible (3xd) due to wedge-shaped drill tip with parallel cutting edges.
  • Assembly without gaps; wood does not split or rupture.
Professional Installation Requirements
  • Professional installation recommended to ensure correct fastening and compliance with building standards.
Applications
  • Windows
  • Fitting
  • Furniture
Standards & Compliance
  • AS/NZS 1170 – Structural Design Actions (Wind, Earthquake, Snow Loads)
Environmental Benefits
  • RoHS-compliant material ensures reduced hazardous substances.
  • Durable hardened steel construction extends product life, reducing waste.
Warranty Information

Warranty details available upon request from Wurth; typically covers manufacturing defects.

Available Now

The Wurth ASSY®plus 4 FBS RCS window construction screw is available for immediate purchase, ideal for window construction, fitting, and furniture applications.

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