Carbon Steel Hex Head Sheet to Medium Section 

For fixing sheet to cold rolled purlins (1.5mm – 6.0mm steel).


Part Number Length (MM) Diameter (MM) Drill Point
25.3 25 6.3 No. 3

Medium section screws fasten sheet metal to cold rolled purlins (1.5mm – 6.0mm steel).

  • Carbon steel is the most popular material for fixings as it is strong, weather resistant and affordable.
  • Hex heads are standard across the industry, and require a 5/16″ socket, which we also supply.
  • The coarse thread provides excellent engagement with the purlin, maximising pull-out values.
  • The no. 3 drill point is designed to maximise accuracy whilst ensuring a clean cut through up to 6.0mm steel, without burn-out.

For maximum fastener performance, we recommend using a tek screw driver which does not exceed 2500RPM.




A (mm) 8.64
B (mm) 25.00
C (mm) 17.00
D (mm) 6.30
E (mm) 8.00
F (mm) 5.70
G (mm) 12.25

Click to download Technical Data Sheet

25.3   ⭳
Pull Out (kN) - 2.0mm S275 Steel 3.96
Pull Out (kN) - 4.0mm S275 Steel 9.96
Pull Out (kN) - 6.0mm S275 Steel 11.50
Shear (kN) 9.10
Tensile (kN) 17.50




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