Cap head socket screws are useful as an alternative to a hex head bolt where there is no space for a spanner. They have a high tightening ability due to their relatively large hex key size compared to other socket screw head types. They are fully threaded and conform to DIN 912 (ISO 4762). This set contains a comprehensive selection of the most popular lengths of M3, M4 and M5 (3mm, 4mm & 5mm thread diameter) screws. A2-70 stainless steel, also known as 304 or 18/8 grade has great weather resistance and longevity. It can be used in all outdoor conditions apart from where consistent exposure to either salt water or sewerage is expected.
