BS EN ISO 898-3 2018/A1 2021 Fasteners. Mechanical properties of fasteners made of carbon steel and alloy steel - Flat washers with specified property classes.pdf

BS EN ISO898-3:2018A1:2021 BSI Standards Publication Fasteners-Mechanical properties of fasteners made of carbon steel and alloy steel Part 3:Flat washers with specified property classes bsi. BS EN ISO898-3:2018A1:2021 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN ISO 898-3:2018A1:2021.It is identical to ISO 898-3:2018 incorporating amendment 1:2020.Together with BS EN ISO 7091:2000 BS EN ISO7092:2000 BS EN ISO7093-1:2000 BS EN ISO7093-2:2000 and BS EN ISO 7094:2000 it supersedes BS 4320:1968 which is withdrawn.It also supersedes BS EN ISO 898-3:2018 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags.Tags indicating changes to ISO text carry the number of the ISO amendment.For example text altered by ISO amendment 1 is indicated by A)Al. The UK participation in its preparation was entrusted to Technical Committee FME/9 Fasteners. A list of organizations represented on this mittee can be obtained on request to its mittee manager. BSI as a member of CEN is obliged to publish EN ISO 898-3:2018 as a British Standard.However attention is drawn to the fact that during the development of this European Standard the UK mittee voted against its approval. FME/9 voted to disapprove this standard for the following reason. Table 1 of ISO 898-3:2018 does not permit 100 HV washers to be used with 8.8/8 bolt and nut assemblies or with 10.9/10 bolt and nut assemblies. Bolt nut and washer assemblies using these washers are permitted in accordance with the cited harmonized standard EN 15048-1:2007 (see EN 15048-1:2007 Table 6) and are required for use in structural connections as specified in EN 1090-2 Execution of steel structures and aluminium structures -Part 2:Technical requirements for steel structures. These assemblies are used extensively in non-preloaded structural bolting in the UK and have been used successfully for well over 40 years. The function of the ...