Frequently Asked Questions
What size screws are used for uPVC window frames?
The most common sizes for uPVC window installation are 3.9×13mm (for bead fixing and hardware), 3.9×19mm and 3.9×25mm (for frame joints and fixing screws). 4.8mm screws are used for heavier fixing applications.
Are your uPVC frame screws self-tapping?
Yes — all our uPVC window frame screws are self-tapping and do not require a pre-drilled pilot hole in standard uPVC profiles.
What drive type do your uPVC screws use?
Our uPVC frame screws are available in Pozi (PZ2) and Phillips drive. PZ2 is the most widely used for window installation in the UK.
-
Techfast Window Screw 3.9x13mm – Self-Tapping & Self-Drilling (Available in 100, 500, or 1000)
Regular price From £5.20 GBPRegular price -
Baypole Screws BZP (Zinc Plated) 4.8mm – Self-Drilling – Pack Sizes 50 to 1000 – Available in Multiple Sizes
Regular price From £4.15 GBPRegular price
