Window Drilling Screw, White Zinc
Specifically engineered for aluminium window-frame installation. White zinc finish.

Specification
| Application | Aluminium window frame assembly |
|---|---|
| Finish | White zinc |
| Point | Self-drilling |
| Diameter | 4.2 – 6.3 mm (#8 – #14) |
| Length | 13 – 80 mm |
| Drive | Phillips, Torx |
| Material | Hardened SAE 1022 carbon steel |
| Drill capacity | 1.5 – 5 mm steel, depending on flute |
Custom sizes, finishes and OEM packaging available. Samples shipped within 5 working days of approval.
Why it is built this way
Engineering notes
Aluminium window profiles are thin, extruded and unforgiving. The screw has to drill without grabbing, thread into a wall thickness measured in fractions of a millimetre, and finish with a head that will not foul the gasket channel or the sash travel — all while looking acceptable, because on a window the fixing is often visible.
That last constraint is why this variant is plated white zinc rather than phosphated. The bright finish sits comfortably against mill-finish and anodised aluminium, and it gives the frame fabricator a fastener that does not have to be hidden.
Key features
- Engineered for thin-wall aluminium extrusion
- Bright white zinc finish suits visible frame fixings
- Self-drilling point avoids a separate pilot operation
- Available in Phillips or Torx recess
Typical applications
- Steel roofing & cladding
- Pre-engineered buildings
- HVAC ducting
- Steel stud framing
- Sheet metal fabrication
- Solar mounting hardware
Buyer questions
Frequently asked
Can it be used on uPVC windows as well?
Is a stainless version available?
Do you supply to window fabricators in volume?
Same family
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Wide low-profile modified truss head, Phillips drive. Distributes load over a larger area without pull-through.

Pan Framing Head Phillips Self-Drilling Screw
Pan framing head — slightly raised low-profile. Used for steel-stud framing where head clearance is tight.

Pan Phillips Head Self-Drilling Screw
Standard pan head with Phillips drive and self-drilling tip. The everyday sheet-to-sheet fastener.
Quote Window Drilling Screw, White Zinc
Send diameter, length, finish, packaging and target volume. Pricing, lead-time and Incoterms come back within one business day.