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Washer Head Screw | Steel Zinc Plated | Partial Thread | 50 PCS | by Wurth
The ASSY® 4 WH II washer head screw is designed for structural wood fastening, featuring a durable steel construction with a zinc plated finish. Ideal for timber construction and element construction, this screw ensures optimal power transmission with its RW drive and larger contact area, making it perfect for professional installations.
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Product Name/Title: Washer Head Screw | Steel Zinc Plated | Partial Thread | 50 PCS | by Wurth
Brand: Wurth
SKU: 177580240
Alternatively Known As: Washer head wood screw, partial thread wood screw, structural wood screw, zinc plated wood screw
Technical Specifications
- Nominal diameter: 8 mm
- Length: 240 mm
- Thread length: 100 mm
- Head type: Washer head II
- Head diameter: 18.4 mm
- Head height: 2.5 mm
- Internal drive: RW40
- Thread type: Wood screw thread
- Thread design: Partial thread
- End milling cutter: Yes
- Thread form: Coarse thread
- Core diameter: 5.3 mm
- Shape of tip: Tip with hilltop milling cutter
- Angle of the tip: 34 degrees
- Material: Hardened steel
- Surface: Zinc plated
- Colour: Silver
- Max screw-in angle: 90 degrees
- Min screw-in angle: 0 degrees
- Suitable materials: Wood, derived timber product, softwood, board plywood (BSP), hardwood, LVL
- Additional accessory: Bit lock
- Approval: ETA-11/0190
- RoHS-compliant: Yes
- Dimensions (H x L x W): 2.5mm x 240mm x 18mm
- Weight: 0.15 kg
Key Features
- Universal partial-thread screw with washer head for wood-wood fastening
- Suitable for 90° or inclined screw connections in structural wood construction
- Ideal power transmission thanks to RW drive
- Larger contact area at the bit for more power
- Tight-fit recess and perfect bit fit for precise positioning and one-handed working
- Compatibility with previous AW drive
- Visually appealing screw connection with option of countersinking
- High head penetration values and strong combination of wooden components
- Reduced force required when fastening due to milling shank displacement effect
- Minimized risk of screw breakage due to high breaking torque
- Reduced risk of injury from protruding metal chips
- High protection of application tools
- Reinforced asymmetrical thread flank geometry for higher power transmission in hardwoods
- Smooth thread start ensures optimized recessing
Professional Installation Requirements
- Professional installation recommended by qualified personnel experienced in structural wood fastening to ensure safety and compliance.
Applications
- Structural woodwork
- On rafter insulation
- Element construction
- Timber construction
- Timber panel construction
- Roof
Standards & Compliance
- Complies with AS/NZS 1170 – Structural Design Actions (Wind, Earthquake, Snow Loads)
Environmental Benefits
- RoHS-compliant ensuring reduced hazardous substances
- Durable hardened steel construction extends product life reducing waste
Warranty Information
Comes with Wurth standard warranty against manufacturing defects.
Available Now
Available for immediate purchase, ideal for structural wood construction and timber panel applications.
