# ISO 6624-1:1986 — Withdrawn and superseded ISO standards

For ISO 6624-1:1986, item title is Internal combustion engines — Piston rings — Part 1: Keystone rings; status code is 9599; successor is ISO 6624-1:2001; withdrawn / published date is 1986-08-21, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6624-1:1986 _(verified: appears in the quote below)_
- **Item title:** Internal combustion engines — Piston rings — Part 1: Keystone rings _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6624-1:2001
- **Withdrawn / published date:** 1986-08-21 _(verified: appears in the quote below)_

## What the source says

> 13041,IS,,ISO 6624-1:1986,Internal combustion engines — Piston rings — Part 1: Keystone rings,Moteurs à combustion interne — Segments de piston — Partie 1: Segments trapézoïdaux,1986-08-21,1,['43.060.10'],ISO/TC 22,9599,,[26900],"['en','fr']",15,"<p>Specifies the essential dimensional features of T-, TB-, TM-, K-, KB- and KM-keystone piston ring types. The requirements apply to compression rings for reciprocating internal combustion piston engines, up to and including 200 mm diameter. Tabulates dimensions of T-, TB- and TM-keystone rings having 6° (table 7) and K-, KB- and KM-keystone rings having 15° (table 8).</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).