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ASSY® 4 WH II Washer Head Screw Zinc Plated Partial Thread Variant-2 Wurth
ASSY® 4 WH II washer head screws are designed for structural wood fastening, featuring a zinc-plated finish and a universal partial-thread design.
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Technical Specifications
- Nominal diameter: 8 mm
- Length: 120 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): 3mm x 120mm 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 connection 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
- Installation by a qualified professional is recommended to ensure structural integrity and compliance with building codes.
Applications
- Structural woodwork
- On rafter insulation
- Element construction
- Timber construction
- Timber panel construction
- Roof fastening
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
Wurth ASSY® 4 WH II washer head screws are available for immediate purchase, ideal for structural wood construction and timber fastening applications.
