Chain size

3/8" · .050" · 91 DL chain: which saws it fits

A 3/8" (full profile) pitch, .050" gauge chain with 91 drive links. It is most often found on 28" bars, and fits 45 chainsaw and pole-saw models from 1 brands in Oregon's fitment data. Bar length alone doesn't decide fit — all three numbers have to match your saw.

Pitch3/8" (full profile)

Gauge.050"

Drive links91

Typical bar28"

Oregon chains in this size: 72CJ091G, 72EXJ091G, 72EXL091G, 72TXL091G

Confirm it's your size

Read the bar stamp. Near the tail of the guide bar you'll usually find pitch, gauge and drive links, e.g. 3/8 .050 91. Some bars stamp the Oregon bar number instead — look it up on oregonproducts.com.
Count the drive links on your old chain — the teeth that ride inside the bar groove, not the cutters. It must be exactly 91.
If the stamp is worn off, the owner's manual lists the bar and chain; find it on the manufacturer's support site.

Easy to mix up with

3/8" · .050" · 84 DL — same pitch and gauge, shorter loop (usually 24" bars)
3/8" · .050" · 93 DL — same pitch and gauge, longer loop (usually 28" bars)

All 45 models, by brand

STIHL 45 models

038 28"
38 28"
038 Super MAGNUM 28"
039 28"
39 28"
040 28"
40 28"
041 28"
41 28"
042 28"
42 28"
044 28"
44 28"
044 MAGNUM 28"
045 28"
45 28"
046 28"
46 28"
046 MAGNUM 28"
048 28"
48 28"
056 28"
56 28"
056 SUPER 28"
064 28"
64 28"
066 28"
66 28"
066 MAGNUM 28"
MS 440 28"
MS 440 MAGNUM 28"
MS 441 28"
MS 441 C 28"
MS 441 C-M 28"
MS 441 C-MQ 28"
MS 441 RC-M 28"
MS 460 28"
MS 460 MAGNUM 28"
MS 461 28"
MS 500i 28"
MS 650 28"
MS 660 28"
MS 660 MAGNUM 28"
MS 661 C-M 28"
MS 661 R C-M 28"

Source: Oregon part-finder fitment data, retrieved 2026-07-06. We list a model here when Oregon recommends a 3/8" · .050" · 91 DL chain for one of its bar lengths; we haven't fitted each saw ourselves. Some bar configurations in the source don't give a drive-link count and aren't included — if your saw isn't listed, count your chain.