Trade Discount 20%
ASSY® 4 WH II Washer Head Screw | Zinc Plated | Partial Thread | 8mm Diameter | @Pack of 50 | by 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. Ideal for timber construction and roof fastening, these screws ensure optimal power transmission with their RW drive and larger contact area, making them perfect for both professional and DIY applications.
Please sign in so that we can notify you about a reply
Sign in
Please login to continue to your account.
Product Name/Title: ASSY® 4 WH II Washer Head Screw | Zinc Plated | Partial Thread | 8mm Diameter | @Pack of 50 | by Wurth
Brand: Wurth
SKU: 177580120
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: 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.
