Metal Screws 12x75mm with 26mm EPDM Washer (50 Pack)

The Metal 12×75 screws with 26mm EPDM washer are the long-reach fixing for the EZ Glaze polycarbonate system on steel or aluminium subframes. The 75mm length passes through the high profile of the sheet and bites deeply into the metal purlin below, which is what you need when a roof is fixing into heavier or deeper structural sections.

Each screw has a self-drilling tip that pierces architectural-grade metal purlins without a separate pilot hole, so installation is fast and one-hit. Around the shank, the 26mm EPDM-bonded washer spreads the clamping pressure across the sheet crest. That wide surface stops the screw head pulling through or cracking the sheet under wind load, and the EPDM gasket compresses against the crest to seal the fixing point against rain, dust and draughts.

Because polycarbonate expands and contracts with temperature, the flexible EPDM washer is essential. It holds the sheet down while allowing the natural movement that a rigid fixing would resist and eventually damage.

Key Features

• 12g x 75mm, the long-reach option for metal frames
• Self-drilling tip for one-hit installation
• 26mm EPDM-bonded washer for wide load distribution
• Crest-fixing geometry for high-profile EZ Glaze sheets
• Weatherproof seal that allows thermal movement
• Supplied in a 50 pack

Specifications

Applications

• Fixing EZ Glaze sheets to steel or aluminium purlins
• Roofs fixing into deep or heavy metal sections
• Pergolas, patios, verandas and carports

What You Need To Complete The Job

These screws fix the sheet to the metal frame. Finish the roof with the EZ Glaze Ridge Cap at the apex and the EZ Glaze Head Wall Flashing at a wall junction. The full EZ Glaze system is in the EZ Glaze category.

Frequently Asked Questions

When do I use the 75mm metal screw?

Use it when fixing EZ Glaze into steel or aluminium purlins, and especially when the sheet profile is high or the metal section is deep. The longer screw gives a stronger bite into the metal for better wind-lift resistance.

Do I need to pre-drill the metal?

No. The screw has a self-drilling tip designed to pierce metal purlins without a pilot hole. That makes installation faster and keeps the fixing point clean.

Why is the 26mm washer critical for metal fixing?

Metal and polycarbonate both move with temperature, but at different rates. The wide 26mm washer spreads the clamping force across the sheet crest so it does not crack, while the EPDM gasket stays flexible and keeps the fixing watertight as the panel moves.

How many screws come in a pack?

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

Will these screws suit aluminium as well as steel?

Yes. The self-drilling tip handles both steel and aluminium sections used for roof frames. They are the metal-specific fixing for the EZ Glaze system; for timber frames use the timber screws instead.