The fastest, easiest, and most aesthetically pleasing way to secure your Onduline bitumen roof sheets. With a low-profile head design of just 3.9mm, these 65mm screws blend seamlessly with the roof for a sleek and almost invisible finish. Supplied in a bag of 100, Onduline universal screws feature a Phillips head design for use with standard screwdrivers, making installation quick and efficient. They can be used to fit Onduline's bitumen corrugated sheets, ridges, and end pieces. Pack of 100 - 65mm screws with low-profile 3.9mm head. 16mm integrated washers for a tight weatherproof seal. Strong and secure with high resistance against wind uplift. For corrugated sheets, applied to the crown of the corrugation. Easy installation with Phillips head for standard screwdriver use. Red finish to match red roof sheets, ridges, and edges. The Onduline screws come in 65mm length and are to be used in conjunction with our 2.6mm and 3mm bitumen roofing sheets. They offer a great way to fix your bitumen sheets to your timber subframe by screwing the sheets at the corrugation peak to the frame, helping keep the corrugation channels free, allowing for water to flow freely down the channels. Provided in bags of 100.