This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction
with EN 14399-1 for:
general requirements;
testing for conformity evaluation;
evaluation of conformity;
regulatory marking;
for assemblies of high-strength structural countersunk bolts and nuts of system HR suitable for preloaded joints
with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9 and EN 14399-2 for suitability testing.
This document gives requirements for:
dimensions;
associated washer(s) according to EN 14399-5 or to EN 14399-6;
performance and suitability tests;
for assemblies with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9.
Countersunk bolt and nut assemblies to this document have been designed to allow preloading of at least 0,7 f × As according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by elongation of the bolt. For this
purpose the components have the following characteristics:
nut height according to style 1 (see EN ISO 4032),
thread length of the bolt according to ISO 888.
BS EN 14399-7:2007 Referenced Document
EN 10045-1 Metal Products, Mechanical Tests, Charpy Impact Tests, Test Specimens, Testing Conditions
EN 14399-1:2005 High-strength structural bolting assemblies for preloading - Part 1: General requirements
EN 14399-2:2005 High-strength structural bolting assemblies for preloading - Part 2: Suitability test for preloading
EN 14399-5 High-strength structural bolting assemblies for preloading - Part 5: Plain washers*， 2015-02-01 Update
EN 14399-6 High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers*， 2015-02-01 Update
EN 1993-1-8 Eurocode 3 - Design of steel structures - Part 1-8: Joints*， 2024-03-27 Update
EN 20898-2 Mechanical Properties of Fasteners - Part 2: Nuts with Specified Proof Load Values - Coarse Thread (ISO 898-2 : 1992)
EN 26157-1 Fasteners - Surface Discontinuities - Part 1: Bolts, Screws and Studs for General Requirements
EN ISO 10684 Fasteners - Hot dip galvanized coatings (ISO 10684:2004/Cor 1:2008)*， 2009-04-08 Update
EN ISO 3269 Fasteners - Acceptance inspection (ISO 3269:2019)*， 2019-09-18 Update
EN ISO 4032 Fasteners - Hexagon regular nuts (style 1) (ISO 4032:2023)*， 2023-08-30 Update
EN ISO 4759-1 Tolerances for Fasteners - Part 1: Bolts, Screws, Studs and Nuts - Product Grades A, B and C ISO 4759-1:2000*， 2024-04-18 Update
EN ISO 6157-2 Fasteners - Surface discontinuities - Part 2: Nuts
EN ISO 898-1 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 - Technical Corrigendum 1 (ISO 898-1:2013/Cor 1:2013)*， 2013-10-01 Update
ISO 148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method*， 2016-10-01 Update
ISO 261 ISO general purpose metric screw threads - General plan
ISO 888 Fasteners - Bolts, screws and studs - Nominal lengths and thread lengths*， 2012-04-01 Update
ISO 965-2 ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose external and internal screw threads - Medium quality; Amendment 1*， 2021-06-30 Update
ISO 965-5 ISO general purpose metric screw threads — Tolerances — Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance positio*， 2021-07-06 Update
BS EN 14399-7:2007 history
2018BS EN 14399-7:2018 High-strength structural bolting assemblies for preloading. System HR. Countersunk head bolt and nut assemblies
2009BS EN 14399-10:2009 High-strength structural bolting assemblies for preloading - Part 10:System HRC - Bolt and nut assemblies with calibrated preload
1969BS 4395-2:1969 Specification for high strength friction grip bolts and associated nuts and washers for structural engineering. Higher grade bolts and nuts and general grade washers