EXCLUSIVE Otter Roofing & Cladding Timber Screws 14g x 50mm Pack of 5 Galvanised SKU: 231710 MODEL: TISG1450P Error. try again later You've successfully joined the club $ 5 .57 pack of 5 Available on orders $50 to $1500. More info × Mitre 10 Variants Suitable for outdoor use fixing to timber. Mechanical galvanising to class 3. Features and benefits Hex flanged head with EDPM washer. Self-drilling type 17 point. Split coarse thread used in roofing screws to secure roofing material to the screw head.