# ISO 99:1975 — Withdrawn and superseded ISO standards

For ISO 99:1975, item title is Pulleys for flat transmission belts — Diameters; status code is 9599; successor is ISO 22:1991; withdrawn / published date is 1975-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 99:1975 _(verified: appears in the quote below)_
- **Item title:** Pulleys for flat transmission belts — Diameters _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 22:1991
- **Withdrawn / published date:** 1975-05-01 _(verified: appears in the quote below)_

## What the source says

> 3766,IS,,ISO 99:1975,Pulleys for flat transmission belts — Diameters,Poulies pour courroies plates de transmission — Diamètres,1975-05-01,1,['21.220.10'],ISO/TC 41,9599,,[3609],"['en','fr']",2,

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).