Our 20mm screw selection:
You'll find many types of 20mm length screws in this category, such as wood screws, self tapping screws, metal tek screws, roofing screws, coach etc
For specific types of screws, please use the top menu or use the filtering panel to the left hand side of the page
All screws are in stock and ready for despatch
Sizing 20mm Screws
20mm length refers to the length of the screw. All screw lengths are sized in millimetres. Countersunk screws are sized inclusive of the head. Pan head or hex head type screws are sized from the under side flat section of the head to the end of the tip or point. Metal tek screws are sized inclusive of the drill tip. Generally metal screws will have a drill tip length under 5mm.