# 7981 — Fastener standard equivalences: DIN to ISO / EN crossover

For 7981, fastener description is Cross recessed pan head tapping screws; iso equivalent is 7049; interchangeability is Marginal change of head dimensions. Caution with automatic feed and connection systems; modification notes is Marginal change of head dimensions. Caution with automatic feed and connection systems, verified against its source on 2026-08-12.

- **DIN standard:** 7981 _(verified: appears in the quote below)_
- **Fastener description:** Cross recessed pan head tapping screws _(verified: appears in the quote below)_
- **ISO equivalent:** 7049 _(verified: appears in the quote below)_
- **Interchangeability:** Marginal change of head dimensions. Caution with automatic feed and connection systems _(verified: appears in the quote below)_
- **Modification notes:** Marginal change of head dimensions. Caution with automatic feed and connection systems _(verified: appears in the quote below)_

## What the source says

> 7981 | | | 7049 | 7049 | 1990-08 | Cross recessed pan head tapping screws | Marginal change of head dimensions. Caution with automatic feed and connection systems |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Fastener description

fullerfasteners.com says fastener description is **Cross recessed pan head tapping screws**, as of 2026-08-12.

> 7981 | | | 7049 | 7049 | 1990-08 | Cross recessed pan head tapping screws | Marginal change of head dimensions. Caution with automatic feed and connection systems |

Source: https://fullerfasteners.com/tech/din-iso-en-crossover-chart/

monsterbolts.com says fastener description is **Head/point differences.**, as of 2026-08-12.

> DIN 7981 | ISO 7049 | Check spec

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners

trfastenings.com says fastener description is **Cross Recessed Pan Head Tapping Screws**, as of 2026-08-12.

> DIN 7981 | ISO 7049 | | Cross Recessed Pan Head Tapping Screws |

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


### Interchangeability

fullerfasteners.com says interchangeability is **Marginal change of head dimensions. Caution with automatic feed and connection systems**, as of 2026-08-12.

> 7981 | | | 7049 | 7049 | 1990-08 | Cross recessed pan head tapping screws | Marginal change of head dimensions. Caution with automatic feed and connection systems |

Source: https://fullerfasteners.com/tech/din-iso-en-crossover-chart/

monsterbolts.com says interchangeability is **Check spec**, as of 2026-08-12.

> DIN 7981 | ISO 7049 | Check spec

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners


## Source

- https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
- https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards

Last verified: 2026-08-12. Review by: 2028-08-11.
Part of [Fastener standard equivalences: DIN to ISO / EN crossover](https://referencesource.org/fastener-thread-standard-equivalence/).