# ISO 6621-1:2007 — Withdrawn and superseded ISO standards

For ISO 6621-1:2007, item title is Internal combustion engines — Piston rings — Part 1: Vocabulary; status code is 9599; successor is ISO 6621-1:2018; withdrawn / published date is 2007-10-30, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6621-1:2007 _(verified: appears in the quote below)_
- **Item title:** Internal combustion engines — Piston rings — Part 1: Vocabulary _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6621-1:2018
- **Withdrawn / published date:** 2007-10-30 _(verified: appears in the quote below)_

## What the source says

> 44467,IS,,ISO 6621-1:2007,Internal combustion engines — Piston rings — Part 1: Vocabulary,Moteurs à combustion interne — Segments de piston — Partie 1: Vocabulaire,2007-10-30,2,"['43.060.10','01.040.43']",ISO/TC 22/SC 34,9599,[13033],[67903],['en'],29,<p>ISO 6621-1:2007 defines the most commonly used terms for piston rings. These terms designate either types of piston rings or certain characteristics and phenomena of piston rings.</p><p>The terms and definitions in ISO 6621-1:2007 apply to piston rings for reciprocating internal combustion engines. They may also be used for piston rings of compressors working under analogous conditions.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).