Twin-Thread Wood Screws – Zinc – Countersunk

About Twin-Thread Zinc Countersunk Woodscrews

Twin-Thread Zinc Countersunk Woodscrews are a traditional twin-thread fixing designed to deliver fast installation and reliable holding strength in common timber applications. They are mainly used in softwood and man-made boards, and can also be used for masonry fixing when installed with a suitable plastic wall plug.

Finished with a bright zinc plating, this range is intended for internal and dry environment applications where speed, consistency and dependable performance are required.

Designed for Fast Timber Fixing

The twin-thread design allows these woodscrews to drive quickly while maintaining strong pull-out resistance, making them suitable for:

• Softwood timber fixing
• Chipboard, MDF and man-made boards
• General joinery and second-fix work
• Masonry fixing when used with a plastic wall plug
• Maintenance and general construction applications

Their traditional design makes them a familiar and practical choice for everyday trade use.

Key Design Features

Twin-thread zinc countersunk woodscrews incorporate features that improve speed, strength and durability:

• Double countersunk head to reduce the likelihood of head shear and assist smooth, flush countersinking
• 60° twin-thread design with parallel shank for faster insertion and increased pull-out resistance
  Single lead start for quicker engagement and easier driving
• 25° sharp point for fast starts and improved thread acceptance
• Manufactured from C10–18 steel to ensure consistent quality

Surface hardened to help prevent torque shearing under load, with a core-hardened structure for improved ductility

All sizes up to and including 30 mm are fully threaded, while 32 mm and above are partially threaded, making longer screws suitable where draw-up is required.

Where Twin-Thread Zinc Countersunk Woodscrews Sit in the Range

Twin-Thread Zinc Countersunk Woodscrews are a traditional, fast-driving fixing option for internal timber applications. They offer a balance of installation speed and holding strength, making them well suited to routine site work and general joinery.

For external use or damp environments, a coated or stainless alternative may be more suitable. For everyday internal fixing, zinc twin-thread woodscrews provide a proven and cost-effective solution.