# DIN 7971 — DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable

For DIN 7971, iso standard is ISO 1481; bs standard is BS4174; part is Slotted Pan Head Tapping Screws, verified against its source on 2026-08-05.

- **DIN standard:** DIN 7971 _(verified: appears in the quote below)_
- **ISO standard:** ISO 1481 _(verified: appears in the quote below)_
- **BS standard:** BS4174 _(verified: appears in the quote below)_
- **Part:** Slotted Pan Head Tapping Screws _(verified: appears in the quote below)_

## What the source says

> DIN 7971 | ISO 1481 | BS4174 | Slotted Pan Head Tapping Screws |

## Source

- https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards

Last verified: 2026-08-05. Review by: 2029-08-04.
Part of [DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable](https://referencesource.org/fastener-standard-interchangeability-exceptions/).