Metal Screws 12x30mm with 26mm EPDM Washer (50 Pack)

The Metal 12×30 screws with 26mm EPDM washer are the standard fixing for the EZ Glaze polycarbonate roofing system on steel or aluminium subframes. The 30mm length is sized for standard-gauge metal rafters and box sections, giving a secure thread engagement without excessive protrusion.

The self-drilling tip pierces the metal purlin without a separate pilot hole, which saves real time on site when you are fixing a whole roof. The critical part is the oversized 26mm EPDM-backed washer. It spreads the clamping force evenly across the polycarbonate crest, preventing the sheet from cracking under stress, and the integrated EPDM gasket creates a permanent, flexible seal that keeps water out at the puncture point.

Because polycarbonate expands and contracts with temperature, the washer allows that natural movement while maintaining a waterproof barrier. It is a small part, but it is the difference between a roof that stays leak free for years and one that fails at the first hard summer.

Key Features

• 12g x 30mm, sized for standard metal rafters
• Self-drilling tip for quick one-hit installation
• 26mm EPDM-backed washer for wide load distribution
• Prevents stress-crazing of the sheet around the fixing
• Weatherproof seal that allows thermal movement
• Supplied in a 50 pack

Specifications

Applications

• Fixing EZ Glaze sheets to steel or aluminium rafters
• Standard-gauge metal box sections and angle iron
• Pergolas, patios, verandas and carports

What You Need To Complete The Job

These screws fix the sheet to the metal frame. Add EZ Glaze Ridge Cap at the apex and the EZ Glaze Head Wall Flashing at a wall junction, plus a layer of Purlin Tape along the frame. The full system is in the EZ Glaze category.

Frequently Asked Questions

What thickness of metal will these screws fix into?

They are designed for the standard-gauge steel and aluminium sections used in roof frames, such as box sections, angle iron and purlins up to normal structural thickness. For deeper or heavier sections, use the longer 75mm metal screw.

Do I need a pilot hole?

No. The self-drilling tip pierces the metal as the screw is driven, so there is no separate pilot hole to drill. That is what makes the installation quick on a full roof.

Why is the 26mm washer so important on a metal roof?

Polycarbonate and metal move at different rates as the temperature changes. The wide 26mm washer spreads the clamping force across the sheet crest so it does not crack, and the flexible EPDM gasket keeps the fixing sealed as the panel moves.

How many screws are in a pack?

Each pack contains 50 screws. Allow about six per sheet at the recommended crest spacing, so a pack covers a typical small to medium EZ Glaze roof.

Are these the right screws for a timber frame?

No. These are metal screws with a self-drilling tip for steel or aluminium frames. For timber rafters and battens, use the matching EZ Glaze timber screws with the same 26mm washer.