# ISO 6621-5:1988 — Withdrawn and superseded ISO standards

For ISO 6621-5:1988, item title is Internal combustion engines — Piston rings — Part 5: Quality requirements; status code is 9599; successor is ISO/WD 6621-5 | ISO 6621-5:2005; withdrawn / published date is 1988-12-29, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6621-5:1988 _(verified: appears in the quote below)_
- **Item title:** Internal combustion engines — Piston rings — Part 5: Quality requirements _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/WD 6621-5 | ISO 6621-5:2005
- **Withdrawn / published date:** 1988-12-29 _(verified: appears in the quote below)_

## What the source says

> 13037,IS,,ISO 6621-5:1988,Internal combustion engines — Piston rings — Part 5: Quality requirements,Moteurs à combustion interne — Segments de piston — Partie 5: Exigences de qualité,1988-12-29,1,['43.060.10'],ISO/TC 22,9599,,"[26895,40891]","['en','fr']",9,<p>Specifies those quality aspects which are capable of definition but not normally found on a drawing specification. Covers single-piece and multi-piece piston rings of various materials. Applies to all rings up to and including 200 mm diameter covered by the above classification for both reciprocating internal combustion piston engines and compressors.</p>

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).