BS EN 14399-10:2018

What is BS EN 14399-10 - Bolt and nut assemblies about?  

BS EN 14399 is a series of European standards on bolting assemblies that discusses the best procedures and specifications required for manufacturing high-quality bolt and nut assemblies with calibrated preload. BS EN 14399‑10 is the 10th part of a series of documents on high-strength structural bolting assemblies for preloading. 

BS EN 14399-10 specifies, together with EN 14399-1 and EN 14399-2, the requirements for assemblies of high-strength structural bolts and nuts of system HRC suitable for preloaded joints, with hexagon head (large width across flats), cup head, or countersunk head, thread sizes M12 to M36 and property class 10.9/10. 

Bolting assemblies in accordance with BS EN 14399-10 have been designed to allow preloading of at least 0,7 fub × As1) according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt. For this purpose the components have the following characteristics: 

• Regular nut height according to style 1, see EN ISO 4032; or 
• Nut with height m = 1 D; 
• Thread length of the bolt according to ISO 888. 

Bolting assemblies in accordance with BS EN 14399-10 include washers according to EN 14399-6 or EN 14399-5 (under the nut only). 

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 the proper application, reference to EN 1090–2 is made. 

Who is BS EN 14399-10 - Bolt and nut assemblies for?  

BS EN 14399-10 on high-strength structural bolting assemblies is relevant to: 

• Manufacturer of structural bolts and nuts  

Why should you use BS EN 14399-10 - Bolt and nut assemblies? 

The bolt consists of a head and a cylindrical body with screw threads along a portion of its length. The nut is the female member of the pair, having internal threads to match those of the bolt.  

BS EN 14399-10 navigates you through the dimensions of bolts, specification for bolts and reference standard, marking of bolts, dimensions of nuts, specification for nuts and reference standards, proof load values of nuts. BS EN 14399-10 provides guidance on the functional characteristics of the bolt/nut/washer assembly. 

BS EN 14399-10 exemplifies the required composition of high-strength structural bolting assemblies and component marking that help you achieve precision in terms of product functionality. BS EN 14399‑10 provides dimensions of bolts and nuts which helps you to manufacture bolts and nuts of precise dimension. As a user of BS EN 14399-10, you can be ensured of the properties of the head bolt and nut assemblies. With obedience and compliance to BS EN 14399-10, you can efficiently manufacture high-quality bolt and nut assemblies with calibrated preload. BS EN 14399-10 provides you with comprehensive information useful throughout the process of production. 

What’s changed since the last update?  

BS EN 14399-10:2018 supersedes BS EN 14399-10:2009, which is withdrawn. 

In comparison with EN 14399-10:2009, the following modifications have been made: 

• Table 1 containing the overview of the marking of components of bolting assemblies for preloading was added 
• Specifications for the designation of the bolting assemblies have been revised 
• Dimensions and markings of HRC bolts with countersunk heads have been added 
• Dimensions and limiting values of M36 diameter bolts and nuts have been added 
• The requirement for the coefficient of variation has been revised