# ISO 1720:1974 — Withdrawn and superseded ISO standards

For ISO 1720:1974, item title is Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm); status code is 9599; successor is ISO 10208:1991 | ISO 10207:1991; withdrawn / published date is 1974-07-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 1720:1974 _(verified: appears in the quote below)_
- **Item title:** Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 10208:1991 | ISO 10207:1991
- **Withdrawn / published date:** 1974-07-01 _(verified: appears in the quote below)_

## What the source says

> 6340,IS,,ISO 1720:1974,Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm),Forage des roches — Matériels pour forage percutant de longs trous — Équipements à filetage corde 1 1/2 à 2 in (38 à 51 mm),1974-07-01,1,['73.100.30'],ISO/TC 82,9599,,"[18240,18238]","['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).