Information about the difference between HR (BS EN 14399-3) and HV (BS EN 14399-4) bolt assemblies UKCA & CE marked.

System HV (Hochfest Vorgespannte Verbindung) assemblies have a short bolt thread and use a thinner nut to obtain ductility by plastic deformation of the threads within the nut. Both HR and …

Tension Control Bolts and the innovative shear wrench system are the lowest cost method of properly installing high strength preloaded bolting assemblies. The standard TCB is …

BS EN 14399-3 HR Bolting Assemblies Composition of high-strength structural bolting assemblies and component marking

HR should stand for High Resistance and HV for Hochfeste Bolzen mit Vorspannung (in English high resistance bolts for pretension). The second is an official description, and they should …

These solutions utilize different systems (HR and HV) of Bolt/nut/washer assemblies, see Table 1. Both systems are well proved and it is up to the experts responsible for Structuring bolting …

This document specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts of system HR suitable for preloaded joints with large widths …

EN 14399-1 High-strength structural bolting assemblies for preloading (System HR and HV). UKCA & CE Marked Bolts, Nuts, Washers in Grade 8.8 and 10.9. Manufacturer, supplier and …

HR bolt are preload structural bolts, nuts and washers assemblies for structural steel applications. Both HR bolts BS EN 14399-3 and HV bolts EN 14399-4 are available from our Ningbo …

EN 1090-2 describes four methods of tighten-ing system HR preloaded bolts: Torque method (N.B. the torque method is not allowed in SHW 1800 (Ref 6), Clause 1808.5.1(6), unless …