Steel Pozi Countersunk Twinthread Woodscrews ZP

The pozi countersunk twinthread woodscrew in zinc-plated steel is the single most commonly used fastener in UK domestic and trade timber fixing - the workhorse screw that appears in virtually every building, joinery, and furniture project across the country. At the DIY Hardware Store, our ZP twinthread woodscrews are available as singles across the full range of sizes needed for everything from general carpentry through to fine joinery.

The twinthread design features two helical threads of the same hand running simultaneously along the shank - the effect is a faster drive (the screw advances further per revolution), a cleaner entry hole with less timber disturbance, and better grip in chipboard and softwood than a single-thread screw of equivalent dimensions. The pozi countersunk head provides a large, positive driver engagement that resists cam-out under the driving torque of a modern power drill.

Zinc plating provides adequate corrosion resistance for indoor use and sheltered external applications - for exposed outdoor use, stainless steel or polymer-coated screws are the appropriate specification. Available in singles from 3/4" x 4 through to 4" x 12 at the DIY Hardware Store.

  • Twinthread design for faster drive and cleaner entry hole
  • Pozi countersunk head for positive driver engagement
  • The standard workhorse woodscrew for UK domestic and trade use
  • Zinc-plated for indoor and sheltered external applications
  • Available across the full size range as singles
  • Suitable for softwood, hardwood, chipboard, and MDF