Tek Screw 5.5x25 Self Tap Self Drill Screw+16mm Wash Pk 100
£5.77
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Tek Screw 5.5x25 Self Tap Self Drill Screw+16mm Wash Pk 100
F221
£5.77
Free UK delivery on orders over £100
Usually dispatched within 1–2 working days
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How to measure?
Measure the Outside Diameter (OD)
Pipe insulation sizes refer to the outside diameter of the pipe — not the bore (internal diameter).
Wrap a tape measure around the pipe, divide by π (3.14) to get the OD. Or use calipers across the outside of the pipe directly.
Pipe insulation sizes refer to the outside diameter of the pipe — not the bore (internal diameter).
|←— OD —→|Wrap a tape measure around the pipe, divide by π (3.14) to get the OD. Or use calipers across the outside of the pipe directly.
Tek Screw 5.5x25 Self Tap Self Drill Screw+16mm Wash Pk 100
High-quality self-drilling screws.
Save time on pre-drilling and lining up.
16mm galvanised washer with bonded rubber layer for a weatherproof seal against the sheet. 5/16 inch hex drive. Use 5.5 x 25 for sheets with an insulation layer (up to 10mm thick).
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