Greenworks 20312 replacement chain and bar size
Verified factory configuration for the 40V model/configuration.
Factory configuration
- Bar length
- 16 in
- Pitch
- 3/8 low profile
- Gauge
- 0.043 in
- Drive links
- 56
- OEM chain
- 2904602
- OEM bar
- 2997402
Configuration and revision caveat
Manufacturer accessory page lists 20312 as compatible; verify installed bar because replacement assemblies can change the required loop
Replacement chain check for the Greenworks 20312
Start with the factory configuration above: 16 in bar, 3/8 low profile pitch, 0.043 gauge, and 56 drive links. The cited OEM chain part is 2904602. This applies only to the cited configuration; Manufacturer accessory page lists 20312 as compatible; verify installed bar because replacement assemblies can change the required loop
- Remove the battery and read the installed guide-bar stamp.
- Match pitch, gauge, and drive-link count to this page.
- If the bar has been replaced or its stamp differs, stop and use the installed-bar specifications instead.
How we verified this
Opened manufacturer page; title/specification block states 16 in, 3/8, .043, 56 DL and compatible product number 20312; companion bar/chain kit 2997402 repeats all four fields
Open manufacturer source (manufacturer accessory specification; checked 2026-08-12).
See models with this exact pitch, gauge and drive-link signature