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Washer Head Screw ASSY® 4 WH II | Zinc Plated | 8mm Diameter | 200mm Length | @Pack of 50 | by Wurth
The ASSY® 4 WH II washer head screw is designed for structural wood fastening, featuring a zinc-plated finish and a nominal diameter of 8 mm. Ideal for timber construction and element construction, this screw ensures high power transmission and reduced splitting, making it perfect for professional installations. With its unique partial thread design, it provides a strong connection in various wood applications.
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Product Name/Title: Washer Head Screw ASSY® 4 WH II | Zinc Plated | 8mm Diameter | 200mm Length | @Pack of 50 | by Wurth
Brand: Wurth
SKU: 177580200
Alternatively Known As: Washer head wood screw, Partial thread wood screw, Structural wood fastening screw, Zinc plated wood screw
Technical Specifications
- Nominal diameter: 8 mm
- Length: 200 mm
- Thread length: 80 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 200mm 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.
- One-handed working and precise positioning due to tight-fit recess.
- Compatibility with previous AW drive.
- Visually appealing screw connection with option of countersinking.
- High head penetration values and strong combination of wooden components.
- Increased pulling together capacity when combined with U-washers.
- Reduced force required when fastening due to screw design.
- Less splitting due to displacement milling effect of the milling shank.
- Minimized risk of screw breakage due to high breaking torque.
- Reduced risk of injury from protruding metal chips.
- High protection of application tools.
- No over-tightening or stripping with high feed.
- Higher power transmission in hardwoods due to reinforced asymmetrical thread flank geometry.
- Better anchoring thanks to higher thread flanks.
- Smooth thread start ensures optimized recessing.
Professional Installation Requirements
- Professional installation recommended to ensure correct fastening and structural integrity in wood construction.
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 zinc plating extends product life reducing waste.
Warranty Information
Warranty as per Wurth standard terms and conditions.
Available Now
Available for immediate purchase, ideal for structural wood fastening in construction and timber applications.
