Start with the fixing material
A short window screw and a masonry frame screw do different jobs. Choose your application, then check the size and pack.
MasonMate 7.5 × 122mm · countersunk T30 · zinc yellow passivated. Check substrate, pilot hole and embedment requirements.
TechFast 3.9 × 13mm · countersunk T15 · Elementech coating. For compatible metal-reinforced PVCu components.
TechFast 4.8 × 70mm · wafer head T25 · Elementech coating. Match the window system’s fixing specification.
For eligible GSD-stocked items in this shipping group. Economy transit: 3–5 working days. Other suppliers may add delivery charges; available services and the final total are confirmed at checkout.
Need another length? Compare the products below. For wood-to-wood work, browse timber screws. Always follow the frame and fixing manufacturers’ instructions.
GSD fixing guide
Start with what the screw will fix into. Masonry frame screws, short window screws and baypole screws have different purposes. Length, head shape, drive and coating vary by product; check the selected listing and the installation specification before ordering.
Masonry: the MasonMate 7.5 × 122mm frame screw has a countersunk T30 head and zinc yellow passivated finish. Confirm the suitable substrate, pilot hole, embedment, edge distance and fixing spacing.
uPVC components: the TechFast 3.9 × 13mm screw has a countersunk T15 head and Elementech coating, for compatible metal-reinforced PVCu components. It is not a masonry frame fixing.
Bay assemblies: the TechFast 4.8 × 70mm option uses a wafer head and T25 drive. The separate BZP baypole range uses PH2 and offers several lengths. Follow the window system’s requirements.
The product grid includes other sizes. The short 7.5 × 42mm masonry screw is not a general substitute for a specified longer frame screw. Confirm permitted fixture thickness and embedment for the selected fixing.
For wood-to-wood fixing, see the timber screw range.
There is no single size for every uPVC frame. First separate a component fixing from a frame-to-wall fixing. The options below are specific products, not interchangeable recommendations for every window or door.
Use the frame and fixing manufacturers’ specifications to confirm length, diameter, spacing and installation method. A longer screw is not automatically a suitable substitute.
No. Short window screws are for compatible components or reinforcement. Masonry fixings must be selected for the substrate, fixture thickness and required embedment, following the manufacturer’s instructions.
No. The featured 13mm TechFast window screw uses T15, the TechFast 70mm baypole screw uses T25, the BZP baypole range uses PH2 and the MasonMate 122mm frame screw uses T30. Check the individual listing.
Selected products offer smaller packs alongside trade quantities. Available pack sizes, prices and stock are shown on each product page. The chooser above links to the lowest-priced available pack for each featured product.
