ParkerTools stock a wide range of M4 setscrews in various metal types and grades and are specialist suppliers of fixings and fasteners to industry and DIY users. We are also leading stockists of CE approved structural fixings and fasteners. No matter whether you are looking for fixings to hold together a steel frame or simply bolt together two bits of wood, ParkerTools can supply the all the fixings and fasteners you will need to get the job done. Grade 8.8 High tensile hexagon head set screws DIN 933 are sometimes referred to as a fully threaded bolts or set pins. They are easily identified by their 8.8 head markings and usually but not always have metric thread forms. The most common surface finish in use is Cr3 bright zinc plated. Hot dipped galvanised finishes are becoming ever more popular, particularly in the rail industry sector.