Zinc wafer flange baypole screws with a self drilling point, specifically designed for joining PVCu bay window sections. Widely used across window and door fabrication. Fire Classification A1. Available in sizes from 4.8 x 40mm to 4.8 x 100mm.
Available options and pricing for Baypole Screws - Wafer Flange - Self Drilling Point - Zinc, with quantity selectors and a running total
Size
SKU
Price
QTY
Total
4.8 x 40mm
289Z
£6.05£7.26
—
4.8 x 50mm
290Z
£6.92£8.30
—
4.8 x 60mm
291Z
£8.02£9.62
—
4.8 x 70mm
292Z
£8.79£10.55
—
4.8 x 80mm
293Z
£9.23£11.08
—
4.8 x 90mm
294Z
£10.20£12.24
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4.8 x 100mm
295Z
£11.10£13.32
—
Zinc baypole screws are the go-to fixing for PVCu bay window fabrication. These wafer flange, self drilling screws are designed to pull sections together cleanly and hold them fast without the need for pre-drilling. The low-profile wafer head sits flush against the profile, keeping the joint neat and the finish tidy. If you’ve ever tried to use the wrong screw for a bay window and ended up with a raised head fouling the frame, you’ll know exactly why these exist.
The self drilling point bites straight into PVCu without skating around or causing the profile to crack. Combined with a zinc coating for corrosion resistance, these screws are built to perform in the kind of environment window fabricators actually work in. The A1 fire classification is worth noting too — useful where building regulations demand it and good reassurance even where they don’t.
Where Zinc Baypole Screws Get Used
The primary application is PVCu bay window fabrication, where sections need to be accurately joined and held in alignment. The wafer flange design is key here — standard pan or countersunk heads simply don’t suit the profile geometry of bay window joints the way a wafer head does. That said, these screws see plenty of use in other window and door fabrication work wherever a discreet, low-profile fixing is needed in PVCu sections.
Available in seven lengths from 4.8 x 40mm through to 4.8 x 100mm, sold in boxes of 200. Whether you’re working through a run of bay frames on a new build or replacing sections on a retrofit job, having the right length to hand saves time and keeps the work looking professional.
Pro Tip: When joining PVCu bay sections, drive the screw until the wafer flange sits fully flush but stop before you strip the profile — PVCu compresses more than timber and it's easy to overdrive with a fast-spinning driver.
Baypole screws are used primarily in the fabrication of PVCu bay windows, securing angled joining sections together accurately and permanently. They are a standard fixing for window fabricators and installers working on new build and replacement window contracts. Beyond bay windows, they are regularly used in PVCu door frame fabrication and other window section joinery where a low-profile fixing is needed and a standard screw head would interfere with the profile or finish.
Best For
PVCu bay window section joining
Window frame fabrication
Door frame fabrication
Low-profile fixing in PVCu profiles
Available In
4.8 x 40mm
4.8 x 50mm
4.8 x 60mm
4.8 x 70mm
4.8 x 80mm
4.8 x 90mm
4.8 x 100mm
Key Features
Self drilling point — no pre-drilling required
Wafer flange head for flush, low-profile finish
Zinc coated for corrosion resistance
Fire Classification A1
200 screws per box
Not suitable for: Not suitable for use in timber, steel or masonry. These screws are designed specifically for PVCu fabrication and are not a general-purpose fixing.
Select the appropriate length for the sections being joined — longer screws give more pull-through into the receiving profile, which matters on thicker or multi-chamber PVCu. No pilot hole is needed. The self drilling point will start cleanly in PVCu without wandering if held square to the surface.
Use a variable-speed driver and keep the torque setting moderate. Drive until the wafer flange is flush with the profile face. Check the joint is pulled tight before the screw fully seats — once it's home, it's home. Over-torquing in PVCu strips the thread quickly, so a controlled finish makes a difference.
Select the correct screw length for the depth of the sections being joined
Align the PVCu bay sections accurately before fixing — repositioning after is difficult
Position the screw square to the profile face at the intended fixing point
Drive at moderate speed using a variable-speed screwdriver or drill driver
Stop as the wafer flange contacts the profile surface — do not overdrive
Check the joint is flush and tight before moving to the next fixing point
Do I need to pre-drill PVCu before using these screws?
No. The self drilling point is designed to start and drive directly into PVCu without a pilot hole. Keeping the driver square to the surface helps the point bite cleanly without skating.
What does the A1 fire classification mean for these screws?
A1 is the highest non-combustibility classification under the European reaction to fire standards. It confirms the screws do not contribute to fire spread — relevant where building regulations specify fire performance requirements for window and door components.
Constructed from steel with a zinc coating to provide corrosion resistance in interior and sheltered external fabrication environments. The wafer flange head profile is dimensioned to suit PVCu bay window section geometry. Fire Classification A1 confirms the material meets the highest non-combustibility rating under European fire reaction standards. Thread form and point geometry are optimised for clean driving in hollow and solid PVCu profiles.
Diameter
4.8mm
Available Lengths
40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm
Head Type
Wafer Flange
Point Type
Self Drilling
Material
Steel
Coating
Zinc
Fire Classification
A1
Box Quantity
200
Weight
N/A
Size
4.8 x 100mm, 4.8 x 40mm, 4.8 x 50mm, 4.8 x 60mm, 4.8 x 70mm, 4.8 x 80mm, 4.8 x 90mm
Box Quantity
200
Product Type
Baypole Screws
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