A popular and attractive socket head screw. Often used where aesthetics are important, or where a low profile finish is required but countersunk screws are not an option . The Allen key drive is generally smaller than in other socket screws and therefore the ultimate tightening torque is lower.  Often referred to as socket button head machine screws or Allen socket bolts. Manufactured to ISO 7380 and fully threaded.

This set contains a comprehensive selection of the most popular lengths of M4 (4mm thread) screws with a corresponding number of nuts and washers and a hexagon Allen key to fit them all together.

A2-70 stainless steel 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.