Content with bolt face washer

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).
Read more about BS EN 14399 High-Strength Structural Bolting Assemblies for Preload Configurator (HR)

02 March 2021
When ordering Preloaded Assemblies (EN 14399-1) to be installed with Direct Tension Indicator Washers (DTIs) , there are 4 different methods of how they can be installed. Depending on the access or preference, you may choose one method, over another. At the purchase stage, we may not know how you will be installing your assemblies. Please read below, as you may require an additional washer(s) to be purchased. Figure 1 Figure 2 Figure 3 Figure 4 Installation methods: Installing DTI under the bolt head when the nut is rotated (Figure 1)
Read more about Do I need Bolt Face Washer or Nut Face Washer (EN 14399-9) with DTI's?

23 November 2016
Dimensions of Nut Face Washers (HN) Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Internal diameter (d1) 12.1-12.35 16.1-16.35 20.1-20.40 22.3-22.60 24.2-24.50 27.2-27.55 30.2-30.55 36.2-36.55 External diameter (d2) 22.7-24 27.7-29 34.4-36 37.4-39 41.4-43 46.4-48 50.1-52 60.1-62 Thickness (h) 2.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 4.4-5.6 4.4-5.6 5.4-6.6 Dimensions of Bolt Face Washers (HB) Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Internal diameter (d1) 13-13.27 17-17.27 21-21.33 23-23.
Read more about BS EN 14399-9 Basic dimensions for Nut Face Washers & Bolt Face Washers

25 August 2014
BS EN 14399-3 Hexagon bolting assemblies for preloading (HR) Previously known as High Strength Friction Grip (HSFG) We are a manufacturer of UKCA & CE Marked pre-loaded fasteners to BS EN 14399. In our facility in Leeds, we can UKCA & CE Approve – assembly test to BS EN 14399-2 HR Assemblies from M12 to M36 up to grade 10.9. We are regularly independently assessed by Lloyd’s Register / LRQA, to make sure, that our company is fully compliant with BS EN 14399 requirements.
Read more about BS EN 14399 High-strength structural bolting assemblies for preloading (CE & UKCA Marked)