Content with Support

12 January 2022
We understand the difficulties by the end-users and purchasing departments in choosing the right components for different installation methods of High-strength structural bolting assemblies for preloading (HR). Different installation methods and product grades may require additional components like DTI washers, hardened washers, bolt face or nut face washers. Sometimes, the number and type of component change, depending on which part is rotated (the nut or the bolt head). We have prepared the HR configurator below to simplify this task.
Read more about BS EN 14399 (HR) Configurator

15 June 2018
Bolt Extender (coarse thread) Internal thread diameter* d Pitch of thread P External diameter, shank diameter D Nominal length m (ref.) Minimum tensile strength** kN M16 2 M24 100 130 M20 2.5 M30 100 203 M22 2.5 M33 100 252 M24 3 M36 100 293 M27 3 M39 100 381 M30 3.5 M42 100, 120 466 M33 3.
Read more about Bolt Extenders – General specification

11 July 2017
Preloaded assemblies with specified k-Class shall be tightened using below methods (See BS EN 1090-2:2008+A1:2011, Table 20 for more details). Method k-Class Torque method K2 Combined method (torque / part-turn) K2 or K1 Direct Tension Indicators (DTI) K2, K1 or K0 k-Class K2 using Torque Method Torque method uses a torque wrench in two steps of assembling.
Read more about Torque values for preload bolt assemblies with specified k-Class

12 December 2015
Andrews Fasteners Bolt Length Calculator EN 14399 Pre-load bolt assemblies (HR) HR Bolt to EN 14399-3:2015 / HR Countersunk bolt EN 14399-7:2007 This calculator is for guidance only and is used for calculating the minimum recommended bolt length based on maximum allowed thickness of the assembly components and the steelwork. This information is provided in good faith and is for your guidance only. Andrews Fasteners Limited / AndFast Malaysia cannot accept any liability for actions taken by third parties based on this information.
Read more about Bolt Length Calculator for HR Bolts and HR Countersunk Bolts (EN 14399-3/7)

07 December 2015
Andrews Fasteners Thread Length (HR CSK) Calculator HR Countersunk Bolt to EN 14399-7:2007 Maximum bolt length = 300 mm The values produced on this calculator are for information purpose only. They are calculated using formulas stated in relevant standard and are provided in good faith and for your guidance only. Andrews Fasteners Limited / AndFast Malaysia can not accept any liability for actions taken by third parties based on this information.
Read more about Thread Length (HR CSK) Calculator for bolts EN 14399-7

06 December 2015
Andrews Fasteners Thread Length (HR) Calculator HR Bolt to EN 14399-3:2015 Maximum bolt length = 300 mm The values produced on this calculator are for information purposes only. They are calculated using formulas stated in the relevant standards and are provided in good faith and for guidance only. Andrews Fasteners Limited / AndFast Malaysia can not accept any liability for actions taken by third parties based on this informations. call_locker = () = { console.
Read more about Thread Length (HR) Calculator for bolts EN 14399-3