Hexagon bolt, nut and washers assembly for high-strength structural bolting assemblies for preloading. EN 14399:3-2005. System HR
High-strength structural bolting assembly for preloading consists of one hexagon bolt for high-strength bolting with large width across flats (EN 14399-3:2005), one hexagon nut for structural bolting with large width across flats (EN 14399-3:2005) and one (two) plain washers for high-strength structural bolting, hardened and tempered (EN 14399-5:2005, EN 14399-6:2005).