TERF® Decking Screws 5.0mm X 50mm Star Torx Reduce Pan Head Brown Finish Anti Corrosion Screws 5.0mm X 50mm For Timber Decking Fence Floorboard Hard and Softwood - Pack of 20 :
Diall PZ Double-countersunk Carbon steel Decking Screw (Dia)5mm (L)50mm, Pack of 500 | DIY at B&Q
Black Painted Decking Screws 10g x 50mm - 500 pc
8g x 50mm SS304 Stainless Steel T17 SQ2 Trim Head Decking Screws PK1000 – Network Building Supplies