Hello BertieBass,
These screws are most commonly used for fixing hinges to chipboard - kitchen cabinets for example. I believe a self-drilling screw is generally used for uPVC hinges as they often need to fix into aluminium in the frame as well. That considered, if this ones the right size for your hinges & window it'll work in uPVC.
Thanks for using Q&A, KC
Answered by: KirstieC
Date published: 2018-04-22