SWEBOLT & BOTNIA BOLT supply fully threaded hex bolts ISO 4017 / DIN 933, in property class 8.8 per ISO 898-1, with zinc-plated (ZN) surface finish for enhanced corrosion protection. The ZN coating provides a clean appearance and rust resistance for typical use in construction, industry, and maintenance. Bolts have metric coarse thread (M) and are suitable for indoor or dry environments.