GSO ISO 6621-4:2025
ISO 6621-4:2024
Gulf Standard
Current Edition
·
Approved on
14 October 2025
Internal combustion engines — Piston rings — Part 4: General specifications
GSO ISO 6621-4:2025 Files
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GSO ISO 6621-4:2025 Scope
This document 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.
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