# MS391 — Stihl chainsaw chain and bar specifications by model

For MS391, bar length is 18"; pitch is 3/8"; gauge is 0.050"; drive links is 66; stihl chain part number is 3624-005-0066, verified against its source on 2026-08-05.

- **Model:** MS391
- **Bar length:** 18"
- **Pitch:** 3/8"
- **Gauge:** 0.050"
- **Drive links:** 66
- **STIHL chain part number:** 3624-005-0066

## What the source says

> MS391 | 3/8" | 0.050" | 60 | 16" | 33RS3 60 | <https://www.alldadelawnmowers.com/search.asp?keyword=3624-005-0060> 3624-005-0060 | <https://www.lawnequipmentsuperstore.com/oempartfinder#/s/ORC//72LGX060G//1/y> 72LGX060G | <https://www.lawnequipmentsuperstore.com/oempartfinder#/s/ORC//72LPX060G//1/y> 72LPX060G | | <https://www.alldadelawnmowers.com/search.asp?keyword=3003-008-8913> 3003 008 8913 | <https://www.lawnequipmentsuperstore.com/oempartfinder#/s/ORC//160VXLHD025//1/y> 160VXLHD025 | 3/8" | 0.050" | 66 | 18" | 33RS3 66 | <https://www.alldadelawnmowers.com/search.asp?keyword=3624-005-0066> 3624-005-0066 |

## Source

- https://www.lawnequipmentsuperstore.com/stihl-chainsaw-bar-chain-quick-guide

Last verified: 2026-08-05. Review by: 2028-08-04.
Part of [Stihl chainsaw chain and bar specifications by model](https://referencesource.org/stihl-chainsaw-chain-and-bar-specs/).