Content with EN 15048

04 February 2022
Apart from dimensional differences ( bigger head of the bolts and bigger nuts on preloaded assemblies), the main difference is in the way how these goods are installed. Non-preloaded bolting assemblies are generally tightened to at least snug-tight. The connected components are drawn together to achieve firm contact without any specific preload. The “snug-tight” is generally referenced as tightening the assembly by one man using a normal-sized spanner without an extension arm until the wrench starts hammering.
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26 January 2021

Following Lloyd’s audit on Monday, 25th and Tuesday, 26th January 2021 we are happy to inform, that Andrews Fasteners Limited successfully passed and been recommended for Certificate Renewal.


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02 February 2018
Following certification renewal audit carried out by Lloyd’s Register Quality Assurance (LRQA) on 31st January 2018 and 1st February 2018, Andrews Fasteners Limited has been found to comply with the requirements and been recommended for the renewal of its certificates for ISO 9001:2015, National Highway Sector Scheme 3 (NHSS 3) and Construction Product Regulations approvals (EN 15048-1:2007 and EN 14399-1:2015). Our final certificates, once issued will be published on our Certificates and Approvals section.
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01 September 2017
Customers very often ask for torque figures for the installation of non-preloaded bolt assemblies . Due to the nature of this type of product, assemblies for non-preload connections, there are no torque figures available. There are various guidances available to calculate theoretical torque figures, but following EN 1090-2 (pt. 8.3), tightening of non-preloaded bolts shall be conducted as follow: EN 1090-2:2008+A1:2011 The connected components shall be drawn together such that they archive firm contact.
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18 December 2015
To accommodate the thickness of zinc it is normal practice to over-tap the nut thread. This operation reduces the strength of the nut and the overall strength of the nut and bolt assembly. To improve the strength of the assembly manufacturers use either a thicker nut (increasing the number of threads between the nut and the bolt in the assembly) or a higher grade nut. BS EN 15048-1: To achieve full tensile resistance, hot-dip galvanized assemblies can require special measures, see EN ISO 10684, Annex F.
Read more about Should higher grade nuts be specified for use with galvanized or sherardized set screws and bolts on CE (UKCA) approved assemblies?

28 October 2015
Our production factory, AndFast Malaysia between 19-22 October 2015 went through Certification Renewal by the accredited body Lloyd’s Register Quality Assurance ( LRQA ). New Approval On that occasion, AndFast Malaysia went through a Change of Approval to include preloaded HR Countersunk CE Assemblies as per EN 14399-7 and Washers as per EN 14399-9. LRQA successfully verified all the requirements and issued a final report for further approval for our factory.
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21 August 2015
Please find below documents as a part of our Technical Support section. If case of any further questions, please visit our Frequently Asked Questions (FAQ) section or contact with Andrews Fasteners Quality Department . BS EN 15048 Non-preloaded structural bolting assemblies (SB) Torque values prepared by W. Christie Guidance On The Tightening of Non-preloaded Fasteners Guide to Design Criteria for Bolted and Riveted Joints, Second Edition BS EN 14399 High-strength structural bolting assemblies for preloading (HR) The different appearance of lubricated nuts on EN 14399 assemblies Configurator for BS EN 14399 High-strength structural bolting assemblies for preloading (HR) Torque values for High-Strength Structural Bolting Assemblies for Preloading with specified k-Class Bolt Length Calculator for HR Bolts and HR Countersunk Bolts (EN 14399-3/7) Thread Length Calculator for Countersunk High-Strength Structural Bolts to BS EN 14399-7 (HR CSK) Thread Length Calculator for Hexagon High-Strength Structural Bolts to BS EN 14399-3 (HR) Comparison of Tightening Methods of HSFG Bolts Detailed comparison of BS 4395 and BS EN 14399-3 & 6 Summary comparison of BS 4395 and BS EN 14399-3 & 6 Grip, Bolt Lengths and Hole Dimensions Guidance notes on the use of Preload Bolt Assemblies BS EN 14399 (HSFG) comparison as an alternative to ASTM HSFG See also: Preloaded assemblies k-Class K1 and K2 manufactured in the UK (from News ) BS EN 14399-9 Direct Tension Indicators Washers Instruction Manual for installing Preloaded (HSFG) bolting with TurnaSure Direct Tension Indicators Washers EN 14399-9 New Generation Direct Tension Indicators Squirter Type DTI performance results Preload Measurement and Comparison of Structural Bolts sets installed in Steel Connections with and without DTI Tests for stress relaxation over time 1963 to 1971 with CLI Fatigue tests on CLI CLI Washers-load gap relationship on unloading and loading DTI Case History - DTIs Save More than $150,000 Study discussing influence of load-indicating washers on bolt relaxation in joints subject to high prying forces Study on full flattening of Direct Tension Indicators in Shear Connections Study on curved protrusion DTIs design assembled without needing nut face or bolt face washers Impact of Variable Lubricity on Type 325 Structural DTIs Test Report for Accelerated Aging of Weathering Steel Joint using TurnaSure Weathering Steel Transverse Vibration Loosening Characteristics of High Strength Fastened Joints using DTIs Coating Trivalent passivation systems (Fasteners+Fixings Magaizne) The HDG (Hot Dip Galvanising) Coating (Source: galvanizeit.
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04 March 2015
Size Nominalstress area (mm^2) Class 8.8 [N] Class 10.9 [N] M12 84.3 70000 87700 (M14) 115 95500 120000 M16 157 130000 163000 (M18) 192 159000 200000 M20 245 203000 255000 M22 303 252000 315000 M24 353 293000 367000 M27 459 381000 477000 M30 561 466000 583000 M33 694 576000 722000 M36 817 678000 850000 Suitability test requirements for BS EN 15048 Non-preloaded structural bolting assemblies (CE & UKCA Marked) Property Classes 8.
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14 February 2015
Chemical composition as per ISO 898-1 for typical grades Class Material and Treatment C min. C max. P max. S max. B max. Tempering temp. [°C] 8.8 carbon steel with additives (e.g. b, mn or cr) quenched and tempered 0.15 (d) 0.40 0.025 0.025 0.003 425 8.8 carbon steel quenched and tempered 0.25 0.55 0.035 0.025 0.003 425 10.9 carbon steel with additives (e.
Read more about ISO 898-1 Carbon Steel and Alloy Steel - Bolts, screws and studs

25 August 2014
Structural bolting assemblies (SB) We are a manufacturer of UKCA & CE Marked non-preloaded hexagon bolt assemblies from M12 to M36, grade 8.8 and 10.9. Andrews Fasteners Limited can manufacture and assembly test to EN 15048-2 requirements , in various grades and coatings . Description Specification Size range Availability Hexagon Set Screw (fully threaded bolt) EN ISO 4017 EN ISO 4018 M12–M36 Buy Online Hexagon Bolt (part threaded) EN ISO 4014
Read more about BS EN 15048 Non-preloaded structural bolting assemblies (CE & UKCA Marked)