These screws have a stainless steel (SS304) body and a hardened carbon steel point. This makes the screws rust-resistant and also capable of drilling through metal. The low and wide surface of the truss head securely holds materials in place without causing any damage.

Basic Information

  • Head Type: Truss head – low profile and broad surface for improved gripping
  • Drive Type: Phillips #2 or PoziDrive #2
  • Point Type: Self-drilling (Type 17 or similar)
  • Material: SS304 stainless steel body and carbon steel drill tip
  • Finish: Plain or passivated stainless steel for improved rust immunity

Strength and Performance

  • Body Hardness: 70–80 HRB (SS304)
  • Tip Hardness: 50–55 HRC (carbon steel)
  • Tensile Strength: 700 MPa or higher
  • Drilling Capacity: Drill mild steel to 2.0 mm thick (size dependent)

Sizes Available

Gauge Diameter Length Range Drill Tip Length Max Steel Thickness
#8 4.2 mm 13–50 mm 3.5–4.0 mm Up to 1.5 mm
#10  4.8 mm 16–75 mm 4.0–5.0 mm Up to 2.0 mm
#12  5.5 mm 19–100 mm 5.0–6.0 mm Up to 2.5 mm

Standards and Compliance

  • ISO 15480 – Truss head self-tapping screws
  • DIN 7504 – Self-drilling screws
  • ASTM F879 – Stainless steel screws

Common Uses

  • Fastening sheet metal onto metal for applications in HVAC, roofing, and cladding
  • Light steel buildings
  • Use for rust-proofing screws are needed

Important Notes

  • These are appropriate when balancing drilling performance with rust-resistance.
  • These are appropriate where standard environments apply.
  • For high corrosion chemical or marine environments, SS316 screws must be used.