Chainsaw Bar Mount Codes (A041, K095, D025): How to Match

A replacement guide bar has to match your saw as well as your chain. The chain side is pitch, gauge and drive-link count (how to read them). The saw side is the mount: the shape of the bar tail, the slot that fits over the bar studs, and the oil and tensioner holes. A bar with the right chain specs but the wrong mount may not bolt on, tension or get oil.

Chainsaw guide bar tail and chain on a workbench before checking mount and oil hole alignment

What the code means

Codes such as A041, K095 and D025 are Oregon’s mount codes, and many aftermarket bars are listed by them. On an Oregon bar they are the last four characters of the 10- or 11-digit part number printed on the package and etched on the bar body. The earlier characters give the length and gauge: in Oregon’s example 180EXLDK095, “18” is an 18” bar, “0” is .050” gauge, and K095 is the mount (Oregon manual, p. 102).

Two details from the same page are easy to miss:

K095 vs Z095. Where two bars of the same called length need different drive-link counts, Oregon swaps the first letter to Z to tell them apart. The mount fits the same saws; the chain does not.
Intenz bars. Saws that came with an Oregon Intenz bar (or were converted to one) have no bar-adjustment pin for tensioning. Use only an Intenz bar on those saws.

Which saws use which mount

Oregon’s manual lists the saw brands each mount was made for (pp. 118–137). A few common ones:

Mount	Brands Oregon lists (not exhaustive)
A041 / K041	Craftsman, Cub Cadet, Dolmar, Homelite, Husqvarna, John Deere, Jonsered, Makita, McCulloch, Poulan, Redmax, Sears, Shindaiwa, Skil, Snapper, Tanaka, Toro
A095 / K095	Cub Cadet, Dolmar, Homelite, Husqvarna, John Deere, Jonsered, Makita, McCulloch, Oleo-Mac, Partner, Pioneer, Poulan, Redmax, Sears, Solo, Stanley, Maruyama pole saws
A074	STIHL, Oleo-Mac
D025	STIHL
D009	Dolmar, Husqvarna, Jonsered, Makita, Partner, Shindaiwa, Solo
D176	Echo, Fairmont, John Deere, McCulloch, Poulan, Redmax, Sears, Skil, Tanaka
K216	Echo
A218	Black+Decker, Echo Power Pruner, Maruyama and Redmax pole saws

The table shows why the brand alone doesn’t settle it: Husqvarna, Makita and Poulan each appear under several mounts, and STIHL under at least two. The mount depends on the saw model.

How to find your mount

Read the old bar. Look for the part number on the bar body near the tail. If it is an Oregon part number, the last four characters are the mount. Other bar makers use their own part numbers, so look that number up with the bar maker.

An example only: the chain specs and the mount code are separate markings, and wording and position vary by maker.
Check the saw’s manual for the bar part number it was sold with, and look that up.
Use a listing that names your exact saw model, not just the brand.
Compare the tails side by side if you have the old bar: stud slot width and length, oil hole position and tensioner hole should line up.

A bar and chain combo guarantees the bar and chain fit each other. It does not guarantee the bar fits your saw, so check the mount the same way.

Fitting a longer bar

Only fit a bar length your saw’s manual lists. Makers set a maximum: Oregon, for example, says not to fit a bar longer than 16” on its CS300 saw (Oregon FAQ). If the longer length is approved:

the mount must still match your saw;
the chain must keep the pitch your drive sprocket takes and the gauge of the new bar’s groove;
the chain will need more drive links — read the count off the new bar or its listing rather than guessing.

Our specs page compares our bar-and-chain combos by length, pitch, gauge and drive-link count.

Sources

Oregon — Safety & Maintenance Manual (PDF): using the guide bar number system (p. 102), guide bars – chainsaw mounts (pp. 118–137)
Oregon — FAQ: CS300 maximum bar length

Checked against these sources on October 1, 2026.