With these sandwich panel screws you can mount sandwich panels on steel. Thanks to the self-drilling tip, it is not necessary to pre-drill the sandwich panel screws. The screws are made of stainless steel so they do not oxidize. The 19 mm EPDM ring under the hexagon head ensures a watertight installation. With these 5.5 x 122 mm sandwich panel screws you can firmly screw sandwich panels with a thickness of 32 - 91 mm. Benefits : - Pre-drilling not necessary - Prevents dented sandwich panels - Waterproof mounting thanks to EPDM ring 19 mm Features - Self-drilling screw for fast assembly in one step - EPDM rubber washer – creates a more reliable seal against water - Fast and robust drill tip with Racing Tip technology – a wave-form cutting edge which removes chips much faster and helps prevents point burn-out - Supporting thread helps to fasten without dents - For reliable fastenings with defined load values Applications - Fastening sandwich panels to steel framing - Ruspert-coated carbon steel for fastening in slightly corrosive environments - Thick metal-to-metal connections (up to 15 mm) - Watertight fastenings – 19 mm washer included - Fastening sandwich panels to steel beams Website : Stay ttuned Cheers