Screws SPAX Universal T20 Half-Round Head WIROX 5 mm x 30 mm 500 pcs

SPAX Universal T20 Half-Round Head WIROX screws, size 5 mm x 30 mm, pack of 500, are designed for general fastening in wood, composite materials and thin metal. Each screw features a half-round head and a T20 Torx drive to reduce cam-out and ensure secure bit engagement. The WIROX finish provides enhanced corrosion resistance compared with untreated steel, making this pack suitable for indoor applications and sheltered outdoor use where moderate protection against rust is needed.

Advantages

The combination of a universal thread geometry and a T20 drive gives consistent performance across different substrates, reducing splitting in timber and improving pull-out strength compared with standard coarse-thread screws. The half-round head offers a clean visible finish on surface-mounted joints while the WIROX coating extends component life in damp environments. Precision manufacturing ensures uniform thread pitch and shank dimensions for predictable torque and reliable assembly when using power drivers.

Suitable for

• General woodworking and joinery tasks
• Fixing composite decking boards and cladding
• Securing thin-gauge metal to wood or composite substrates
• Repair and renovation projects in homes and workshops
• Large assembly jobs requiring consistent screw length and head style

Key specifications

• Diameter: 5 mm
• Length: 30 mm
• Head type: Half-round (raised) head
• Drive type: T20 Torx
• Thread type: Universal thread suitable for wood, composite and light metal
• Surface finish: WIROX corrosion-resistant coating
• Quantity: 500 pieces per pack

How to use

Pre-drilling is optional depending on the substrate and screw diameter; for hardwoods or near-edge installations, use an appropriate pilot hole to reduce splitting. Fit a T20 Torx bit into a compatible driver or cordless drill and set torque to a moderate level to avoid over-tightening. Drive the screw until the half-round head sits flush or slightly proud on the surface, taking care not to strip the drive. For repeated fastenings, use a magazine or guided driver to maintain consistent insertion angle and depth.

Usage recommendations

Use these screws for interior and sheltered exterior projects; avoid prolonged exposure to unprotected outdoor environments. For direct contact with treated timber or coastal locations, consider stainless steel or higher-grade coated fasteners. Store unopened packs in a dry place to preserve the WIROX finish and prevent surface corrosion prior to use.