• TIMCO 5.5 x 25mm hex head light section self-drilling tek screws with 16mm EPDM washer and silver organic finish
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Timco Light Section Self-Drilling Screws 5.5 x 25mm - Steel Cladding Fixings

Timco Light Section Self-Drilling Screws 5.5 x 25mm - Steel Cladding Fixings

£9.17
£9.17
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Engineered for direct fastening of metal roofing sheets into light structural steel up to 5mm thick.

A great choice if you are looking to fix box profile or corrugated sheeting directly to cold-rolled steel purlins without pre-drilling. Built with a No. 3 drill point, an integrated 16mm EPDM washer, and a 500-hour salt-spray protective coating, these dependable fixings create an airtight, weather-tight seal across agricultural and commercial buildings.

Why Choose TIMCO Light Section Screws?

  • Rapid Direct Drilling: The precision No. 3 self-drilling tip with an 8mm point effortlessly cuts through cold-rolled steel purlins and light sections up to 5mm thick, cutting down installation time and eliminating the need for pilot holes.
  • Weathertight Compression Seal: Fitted with a vulcanised 16mm EPDM rubber washer that compresses uniformly against cladding profiles, stopping water ingress, draughts, and sheet corrosion around the fixing hole.
  • 500-Hour Salt-Spray Protection: Treated with an advanced silver organic exterior finish tested to withstand 500 hours of salt spray, offering reliable Class 3 corrosion resistance against rural damp, industrial fallout, and seasonal weathering.
  • Firm Non-Slip Drive: The flanged 8mm hexagonal head gives positive socket engagement with zero cam-out, ensuring fast, safe fixing from ladders or elevated work platforms.
  • Tight Vibration-Resistant Hold: Features a fully threaded 60-degree self-tapping profile that cuts clean threads into light gauge steel, drawing sheets tightly against framework to eliminate wind rattle.

Technical Specification:

Brand TIMCO
Product Code L25W16B
Product Type Light Section Self-Drilling Screw (Tek Screw)
Dimensions (Gauge x Length) 5.5 x 25mm (12 Gauge)
Point Type & Drill Tip Length Self-Drilling No. 3 (8mm Drill Tip)
Maximum Drilling Thickness (MDT) Up to 5.0mm Light Section Steel
Effective Thread Length 10mm (Fully Threaded)
Thread Profile 60° Self-Tapping
Head Type & Dimensions Flanged Hexagon (12mm Flange Diameter, 5.6mm Height)
Drive Method 8mm (5/16") Hexagonal Socket
Washer Specification 16mm Bonded EPDM Vulcanised Rubber Washer
Core Material Case & Core-Hardened Carbon Steel
Finish & Plating Silver Organic Exterior Plating (500 Hours Salt-Spray Tested)
Corrosion Rating Rating 3 (Urban and industrial areas with a low-salt atmosphere)
Standard Compliance BS EN 10666 / DIN 7504
Compatible Substrates Light Section Steel, Cold-Rolled Purlins, Profile Roofing
Pack Quantity & Type 100 Pieces per Box (0.62kg)
Pack Dimensions 98 x 92 x 62mm
Barcode 5055017532377

SKU: SX-L25W16B

MPN: L25W16B

ID: 37798

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