FIXINGS DIRECT - Twistec Wood Screws (Flat/Wafer Head Heavy Duty Screw) With Twistec Star Head Technology For Easy Drive Performance (100, 6.0 x 80mm) : Amazon.co.uk: DIY & Tools
White Truss Head Drilling Screws 4 2/19 pack of 200 pcs
SleeperFit Railway Sleeper Screws | Black Finish (Pack of 50)