SWEBOLT & BOTNIA BOLT supply hex bolts with inch threads (UNC/UNF) manufactured according to ANSI B18.2.1. Available in steel (8.8, 10.9) — plain, zinc-plated (ZN) or hot-dip galvanized (HDG) — and in stainless A2 or acid-resistant A4. Used in equipment, machinery, and assemblies with inch threads, where precision and reliability are required.