Tek screw
Tek screw: self-drilling screw for metal-to-metal or metal-to-timber fixing. Drill, tap, and fasten in one pass. AS 3566. Common in roofing, cladding, LGS.
Ask Chalkline about this →A Tek screw is a self-drilling fastener with a hardened drill-point tip that penetrates steel or timber in a single operation without pre-drilling. The name is a Buildex trade mark (now used generically in Australian construction) for the self-drilling point design, not a head shape. A hex-head Tek, a wafer-head Tek, and a pan-head Tek all share the same self-drilling point.
Tek points are numbered 1 through 5 by steel thickness capacity: Tek 1 drills up to approximately 0.8 mm steel; Tek 3 up to 4.8 mm; Tek 5 up to 12 mm. Using too low a point number for the steel thickness causes the tip to weld to the substrate and snap.
Also known as: self-drilling screw, metal Tek, Teks (plural).
Category: Fixings and fasteners.
Standard: AS 3566.1-2002 (R2015), Self-drilling screws for the building and construction industries (verified 2026-05-10, Standards Australia Store).
Related
- Screws and fasteners for residential construction
- Bolts (M-series metric) for residential construction
See also
Last updated: 2026-05-10. Verified: 2026-05-10. Quarterly review for currency.