# DIN 985 — DIN / ISO / BS fastener equivalents and the sizes where they are not interchangeable

For DIN 985, iso standard is ISO 10511; part is Nylon Insert Lock Nut (thin); interchangeability verdict is Check spec, verified against its source on 2026-08-05.

- **DIN standard:** DIN 985 _(verified: appears in the quote below)_
- **ISO standard:** ISO 10511 _(verified: appears in the quote below)_
- **Part:** Nylon Insert Lock Nut (thin) _(verified: appears in the quote below)_
- **Interchangeability verdict:** Check spec _(verified: appears in the quote below)_

## What the source says

> Nylon Insert Lock Nut (thin) | DIN 985 | ISO 10511 | Check spec | Thin pattern; verify heights.

## 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.

### Part

monsterbolts.com says part is **Nylon Insert Lock Nut (thin)**, as of 2026-08-05.

> Nylon Insert Lock Nut (thin) | DIN 985 | ISO 10511 | Check spec | Thin pattern; verify heights.

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

trfastenings.com says part is **Prevailing torque type Hexagon Thin Nuts with non-metallic insert**, as of 2026-08-05.

> DIN 985 | ISO 10511 | | Prevailing torque type Hexagon Thin Nuts with non-metallic insert |

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


## Source

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