For sizes with a diameter of 20mm and 24mm these can be manufactured but only in larger quantities.
We can offer spun galvanised as an alternative in 20mm and 24mm as a standard range up to 300mm and even 400mm long.
A4 316 Stainless Steel Coach screws Hexagon Head Din 571 – Hexagon head wood screws, also known as lag screws, available in extra long lengths up to 300mm in stainless steel A4 316 mainly for marine or coastal enviroments. We supply coach screws from 4mm diameter up to 16mm diameter as standard for stainless steel. Large quantities can be made to order for bigger diameters.