# 7979 — Fastener standard equivalences: DIN to ISO / EN crossover

For 7979, fastener description is Parallel pins with internal thread; iso equivalent is 8735; interchangeability is Dimensions partially changed; modification notes is Dimensions partially changed, verified against its source on 2026-08-12.

- **DIN standard:** 7979 _(verified: appears in the quote below)_
- **Fastener description:** Parallel pins with internal thread _(verified: appears in the quote below)_
- **ISO equivalent:** 8735 _(verified: appears in the quote below)_
- **Interchangeability:** Dimensions partially changed _(verified: appears in the quote below)_
- **Modification notes:** Dimensions partially changed _(verified: appears in the quote below)_

## What the source says

> Parallel pins with internal thread | 7979 | 8735 | 28735 | | 8735 | 1998-03 | Parallel pins with internal thread, of hardened and martensitic stainless steel | Dimensions partially changed |

## 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 **Parallel pins with internal thread**, as of 2026-08-12.

> Parallel pins with internal thread | 7979 | 8735 | 28735 | | 8735 | 1998-03 | Parallel pins with internal thread, of hardened and martensitic stainless steel | Dimensions partially changed |

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

fullerfasteners.com says fastener description is **Parallel pins with internal thread, of unhardened and austenitic stainless steel**, as of 2026-08-12.

> 7979 | 8735 | 28735 | | 8735 | 1998-03 | Parallel pins with internal thread, of hardened and martensitic stainless steel | Dimensions partially changed | Parallel pins with internal thread, of unhardened and austenitic stainless steel | 7979 | 8733 |

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

trfastenings.com says fastener description is **Parallel Pins with internal thread**, as of 2026-08-12.

> DIN 7979 | ISO 8733 | | Parallel Pins with internal thread | DIN 7979 | ISO 8735 |

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

trfastenings.com says fastener description is **Parallel Pins with internal thread**, as of 2026-08-12.

> DIN 7979 | ISO 8733 | | Parallel Pins with internal thread |

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


### ISO equivalent

fullerfasteners.com says iso equivalent is **8735**, as of 2026-08-12.

> Parallel pins with internal thread | 7979 | 8735 | 28735 | | 8735 | 1998-03 | Parallel pins with internal thread, of hardened and martensitic stainless steel | Dimensions partially changed |

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

fullerfasteners.com says iso equivalent is **8733**, as of 2026-08-12.

> 7979 | 8735 | 28735 | | 8735 | 1998-03 | Parallel pins with internal thread, of hardened and martensitic stainless steel | Dimensions partially changed | Parallel pins with internal thread, of unhardened and austenitic stainless steel | 7979 | 8733 |

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

trfastenings.com says iso equivalent is **8735**, as of 2026-08-12.

> DIN 7979 | ISO 8733 | | Parallel Pins with internal thread | DIN 7979 | ISO 8735 |

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

trfastenings.com says iso equivalent is **8733**, as of 2026-08-12.

> DIN 7979 | ISO 8733 | | Parallel Pins with internal thread |

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


## Source

- https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards
- 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/).