Bolts with hammer head type HKS. Designed with M6 thread in the lengths required for the fixing of ACT clamps of the Standard Series according to DIN 3015, Part 1. For use with safety nuts type MUS-HKS. Manufactured from V4A stainless steel (material key: W55) with improved corrosion resistance by the avoidance of metallic and non-metallic contamination during production, machining and storage. STAUFF ACT clamps: Anti Corrosion Technology. Reduce crevice corrosion on the tube.