This European Standard specifies together with EN 14399-1 and EN 14399-2, the requirements for assemblies of high-strength structural bolts and nuts of system HV suitable for preloaded joints with large widths across flats, thread sizes M12 to M36 and property classes 10.9/10. Bolting assemblies in accordance with this document have been designed to allow preloading of at least 0,7 fub × As 1) according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plastic deformation of the engaged threads. For this purpose the components have the following characteristics: - nut height approximately 0,8 d; - bolt with short thread length. Bolting assemblies in accordance with this document include washers according to EN 14399-6. NOTE Attention is drawn to the importance of ensuring that the bolting assemblies are correctly used if satisfactory results are to be obtained. For recommendations concerning proper application, reference to EN 1090-2 is made. General requirements and requirements for suitability for preloading are specified in EN 14399-2. Clamp lengths and grip lengths for the bolting assemblies are specified in the normative Annex A.
EN 14399-4:2015 Referenced Document
EN 14399-10:2009 High-strength structural bolting assemblies for preloading - Part 10: System HRC - Bolt and nut assemblies with calibrated preload
EN 14399-1:2015 High-strength structural bolting assemblies for preloading - Part 1: General requirements
EN 14399-2:2015 High-strength structural bolting assemblies for preloading - Part 2: Suitability for preloading
EN 14399-3:2015 High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies
EN 14399-5:2015 High-strength structural bolting assemblies for preloading - Part 5: Plain washers
EN 14399-6:2015 High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers
EN 14399-7:2007 High-strength structural bolting assemblies for preloading - Part 7: System HR - Countersunk head bolt and nut assemblies*， 2024-04-20 Update
EN 14399-8:2007 High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assemblies*， 2024-04-20 Update
EN 14399-9:2009 High-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct tension indicators for bolt and nut assemblies
EN 1993-1-8:2005 Eurocode 3: Design of steel structures - Part 1-8: Design of joints
EN 26157-1:1991 Fasteners - Surface Discontinuities - Part 1: Bolts, Screws and Studs for General Requirements
EN ISO 3269:2000 Fasteners - Acceptance Inspection ISO 3269:2000
EN ISO 898-1:2013 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread
EN ISO 898-2:2012 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012)
EN 14399-4:2015 history
2015EN 14399-4:2015 High-strength structural bolting assemblies for preloading - Part 4: System HV - Hexagon bolt and nut assemblies
2005EN 14399-4:2005 High-strength structural bolting assemblies for preloading - Part 4: System HV - Hexagon bolt and nut assemblies