Safe Top No.17 Self Drill Screws Class 3 M5.5X50 P150 Value Jar

Type 17 Self drilling screws has an Envirocaot Mechanical Zinc Class 3 coating that is extremely resistant to corrosion, meets specific standards for self-drilling screws, ensuring consistent quality and performance. Pre-assembled EPDM seal ensures a long-life leak proof fixing. Topgrip under the head draws the roof sheeting up to the EPDM seal ensuring a water tight seal and stability. Self-drilling point ensure fast installing in timber purlins which reduces installation time, as there is no need to pre-drill holes. Coarse thread ensures high pull-out retention and resistance to wind lift. Convenience, for use on timber purlins. Wide range of sizes available to suit all applications. Use 5/16 socket when fixing.