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About This Item

 

Full Description

ISO 6621-4:2003 specifies the general characteristics of piston rings for both reciprocating internal combustion engines and compressors (the individual dimensional criteria for these rings are given in the relevant International Standards). It also provides a system for ring coding, designation and marking. It is applicable to all such rings of a diameter greater than or equal to 200 mm.

 

Document History

  1. ISO 6621-4:2024


    Internal combustion engines - Piston rings - Part 4: General specifications

    • Most Recent
  2. ISO 6621-4:2015


    Internal combustion engines - Piston rings - Part 4: General specifications

    • Historical Version
  3. ISO 6621-4:2003

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    Internal combustion engines - Piston rings - Part 4: General specifications

    • Historical Version