Technical Data Sheet (PDF)

• Double countersunk head: sits flush with the timber and helps reduce the chance of head shear when you drive it home.
• Pozi recess: PZ1 on the 3.0mm size, stepping up to PZ2 and PZ3 on larger gauges, for solid bit grip and less cam-out.
• 40 degree single deep thread: fully threaded up to 75mm for high pull-out resistance and a firm, consistent fixing.
• 25 degree sharp point: starts quickly and helps the screw pull down into the material.
• Wax lubrication: lets the screw drive in more smoothly and cuts down on driver strain.
• Bright silver zinc finish: a clean, low-profile look with corrosion rating 1 for interior use.
• Manufactured to BS EN 14592:2008: a recognised standard for load-bearing timber fixings.

These are general-purpose countersunk wood screws, so the list is long. Typical uses include:

• Fixing softwood framing, battens and studwork.
• Assembling and fitting chipboard and MDF units, shelving and cabinetry.
• Skirting, architrave, door linings and second-fix joinery.
• General workshop and site fixing where a flush, tidy head is wanted.
• Fixing into masonry when used with a suitable plastic wall plug.

Bear in mind the corrosion rating 1: keep these for interior jobs in dry, low-humidity spots. For exterior or damp work, step up to an exterior-rated screw instead.

• Brand: TIMCO
• Material: Carbon Steel
• Finish: Zinc (bright silver, not yellow)
• Head: Double Countersunk
• Recess: Pozi (PZ1 at 3.0mm, PZ2/PZ3 on larger sizes)
• Thread: 40 degree Single Deep, fully threaded up to 75mm (80mm and above have a 70mm thread)
• Point: 25 degree Sharp
• Lubrication: Wax
• Substrates: Softwood, Chipboard, MDF, Masonry (with plug)
• Head diameter: 5.82mm (3.0mm size)
• Gauge: 4 (at 3.0mm)
• Standard: BS EN 14592:2008
• Corrosion rating: 1 (interior, clean, dry, low humidity)

What is a countersunk wood screw?

It's a screw with a cone-shaped head that pulls flush with the surface, or just below it, rather than sitting proud. That gives a neat finish and lets you fill over the head if you want. The TIMCO Solo uses a double countersunk head, which adds a second bearing angle to help spread load and cut down on head shear.

Are these silver or yellow Solo screws?

These are the bright silver zinc version. TIMCO also make a yellow passivated Solo, but this listing is the zinc-plated silver finish. Both are for interior use; the difference is mainly the colour of the coating.

Do I need to drill a pilot hole?

For most softwood you can drive them straight in thanks to the sharp 25 degree point. Near the end of a board, in hardwood, or with larger gauges, a pilot hole helps stop the timber splitting. In MDF a pilot hole is worth it close to edges.

Can I use these outdoors?

No. The zinc finish is corrosion rating 1, which is meant for interior conditions that stay clean, dry and low in humidity. For outdoor decking, fencing or anywhere damp, pick an exterior-grade or stainless screw.

What size Pozi bit do they take?

The 3.0mm screws use a PZ1 bit. Larger diameters step up to PZ2, and the biggest sizes take PZ3. Match the bit to the recess so it seats fully and you don't chew out the head.

Are they fully threaded?

Yes, up to and including 75mm long they're threaded the full length. From 80mm and up the thread runs 70mm, leaving a plain shank under the head, which helps clamp two pieces of timber together.