DIN 965, steel 4.8, galvanised, blue passivated (A2K)
NoticeDIN 965 has been withdrawn and replaced by ISO 7046 part 1/part 2. There is some limited similarity (some head heights and head diameters have been changed | Thread lengths changed | nominal Ø M1.6 removed | strength class 5.8 and A4-70 omitted | thread lengths changed | recessed head penetration depths changed).