EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN 14399-5 testing. This European Standard, together with EN 14399-1 and EN 14399-2, covers large series hexagonal high strength structural bolts with threads M12 to M36 (inclusive) and hardened and tempered flat washers intended for bolt assemblies with nuts.
The standard likely specifies the types of materials suitable for the manufacture of flat washers to be used in high-strength structural bolt assemblies. These materials are expected to have the required mechanical properties and durability.
EN 14399-5 defines the mechanical properties that flat washers must have. These properties may include hardness, tensile strength, yield strength, and elongation.
According to this standard, washers can only be applied under the nut. According to this standard, washers are not designed for use in direct contact with oversized or slotted holes.
However, it is important for the performance of the assembly to avoid mixing the components of both systems. Therefore, bolts and nuts for both systems are standardized in a single part of this European Standard and the marking of the components of the same system is the same.
The functionality of the bolt assemblies, as well as the mechanical properties of the components, require that the specified preload be achieved if the bolt assemblies are tightened in an appropriate procedure. For this purpose, a test method for the suitability of bolt assemblies for preloading has been established, which will demonstrate whether the bolt assemblies are functional.
The standard will likely outline the quality control procedures that manufacturers must follow to ensure flat washers meet specified mechanical and dimensional requirements. This may include testing methods such as hardness testing, dimensional inspections, and more.
EUROLAB assists manufacturers with EN 14399-5 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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