Screw and washer assemblies made of steel with plain washers. Washer hardness classes 200 HV and 300 HV Ingestion-build-47786 General provisions

General provisions

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The fourth group of three digits identifies the specific characteristics for groups of instruments

BS EN 12094-1 helps in the evaluation of conformity of product by using initial type testing and factory production control method that verifies if the performance declarations represent the true behaviour of the product

Screw and washer assemblies made of steel with plain washers. Washer hardness classes 200 HV and 300 HV Ingestion-build-47786 General provisionsBS EN ISO 10644: 2009 BS EN ISO 10644 specifies the requirements for metric screw and plain washer assemblies made of steel with coarse thread M2 to M12 inclusive, flat seating heads, property classes up to and including 10. 9 and washer hardness classes 200 HV or 300 HV. The plain washers are captive, i. e. prevented from disassembly and free to rotate. The manufacturing of screw and washer assemblies takes into consideration material and production