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About This Item

 

Full Description

ISO 6621-4:2015 specifies the general characteristics of piston rings for reciprocating internal combustion engines for road vehicles and other applications (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 nominal diameter from 30 mm up to and including 200 mm.

 

Document History

  1. ISO 6621-4:2015

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

    • Most Recent
  2. ISO 6621-4:2003


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

    • Historical Version