# ISO 6621-1:1986 — Withdrawn and superseded ISO standards

For ISO 6621-1:1986, item title is Internal combustion engines — Piston rings — Part 1: Vocabulary; status code is 9599; successor is ISO/WD 6621-1 | ISO 6621-1:2007; withdrawn / published date is 1986-12-18, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6621-1:1986 _(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/WD 6621-1 | ISO 6621-1:2007
- **Withdrawn / published date:** 1986-12-18 _(verified: appears in the quote below)_

## What the source says

> 13033,IS,,ISO 6621-1:1986,Internal combustion engines — Piston rings — Part 1: Vocabulary,Moteurs à combustion interne — Segments de piston — Partie 1: Vocabulaire,1986-12-18,1,"['43.060.10','01.040.43']",ISO/TC 22,9599,,"[26892,44467]","['en','fr']",16,"<p>This part 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. An annex contains a list of equivalent terms in English, French, Russian, German, Spanish, Portuguese and Italian. Some figures illustrate shapes and reference quantities of concern.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).