Bremick Polycut Hex B8 Cat5 Polycarbonate Fixing 50mm

Engineered by Bremick for professional polycarbonate roofing, the Polycut Hex B8 Cat 5 screw drills, cuts, centres and seals in a single drive. Each 50mm fastener features patented cutting fins that carve the correct expansion hole through the sheet as the tip bites into timber battens or light-gauge steel up to 1.6mm thick. The result is a neat, stress-free fixing that allows Laserlite and similar panels to expand and contract without cracking.

Key Features

• One-action installation, cutting wings create a perfectly centred 10mm clearance hole
• Prevents sheet buckle and saves up to 50% labour time versus two-step methods
• Oversized 29mm clear polycarbonate washer with UV-stable EPDM gasket
• Coarse 14 TPI thread and Type 17 timber point for secure anchorage
• Drill tip pierces steel purlins cleanly
• B8 Class 5 marine-grade multilayer coating resists red rust in salt-spray zones
• Complies with AS 3566.2 Cat 5 for severe coastal and industrial exposure

Specifications

• Brand / series: Bremick Polycut
• Type: hex head crest-fix screw with polycarbonate washer
• Size / thread: 6.2-14 (approx. #14) x 50mm
• Head: 5/16 inch AF hex, moulded captive washer
• Washer assembly: 29mm clear polycarbonate + UV-stable EPDM seal
• Substrate compatibility: timber battens, metal purlins up to 1.6mm
• Coating: B8 Class 5 (marine-grade) multilayer protection
• Corrosion rating: AS 3566.2 Cat 5
• Pack quantity: 50

Applications

• Crest fixing of corrugated or 5-rib polycarbonate sheets
• Pergolas, carports, verandas, greenhouse roofs and factory skylights
• Timber trusses and light steel frames
• Coastal patios, pool enclosures and industrial skylights

What You Need To Complete The Job

For a 65mm fixing of the same screw use the Polycut Hex B8 Cat5 65mm, and for a bulk 250 pack of the Multifix style see the Bremick Polycut Multifix 250 pack. For Laserlite one-shot fixing use One Shot Timber Screws 50mm. Browse the full Screws range and the Polycarbonate Roofing range for the complete system.

Frequently Asked Questions

What makes these screws one step?

The patented cutting wings create a perfectly centred 10mm clearance hole as the screw drives, so there is no separate pre-drilling or reaming stage. That is what saves up to 50% labour time compared with conventional two-step methods.

Why is a clearance hole important in polycarbonate?

Polycarbonate expands and contracts with temperature far more than timber or steel. The clearance hole made by the cutting wings is sized to allow that movement, so the sheet does not stress-crack around the fixing point.

What does the 29mm washer do?

The oversized clear polycarbonate washer, backed by a UV-stable EPDM gasket, spreads the clamping load across the sheet crest and seals the fixing point against water while letting the panel flex.

Is the coating suited to coastal use?

Yes. The B8 Class 5 marine-grade coating and AS 3566.2 Cat 5 rating are designed for severe coastal and industrial exposure, so the screw resists red rust in salt-spray zones.

Can I order for delivery or pickup?

Yes. You can order online and choose Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. Delivery windows depend on your postcode, and we send a confirmation once your order is ready. For any questions call (03) 93941400 or email orders@singhroofingsupplies.com.au.