Stihl 3689-005-0081 Chainsaw Chain 26RM3 | 20" .325 .063 81DL OEM
Product Number: 3689 005 0081
Have Questions?
Our experts are here to answer your questions!
The Stihl 3689-005-0081 chainsaw chain is a genuine OEM Stihl 26RM3 Rapid Micro chain loop for compatible Stihl chainsaws equipped with a 20 inch guide bar. This chain is built to factory Stihl specifications and is designed for saws using .325 inch pitch, .063 inch gauge, and 81 drive links.
Stihl Rapid Micro chain uses a semi-chisel cutter design that offers a strong balance of cutting performance, durability, and easy sharpening. It is a popular choice for firewood cutting, landowner use, farm and ranch work, and professional cutting applications where reliable OEM chain performance is needed.
This is the factory-correct 26RM3 chain loop, not an aftermarket replacement. Always verify your guide bar specifications before ordering. The bar length, pitch, gauge, and drive link count must match your saw and bar setup.
Stihl 3689-005-0081 Specs
Brand: Stihl
Part Number: 3689-005-0081
Condensed Part Number: 36890050081
Chain Model: 26RM3
Chain Type: Rapid Micro
Cutter Type: Semi-Chisel
Bar Length: 20 inch
Pitch: .325 inch
Gauge: .063 inch / 1.6 mm
Drive Links: 81
Condition: New OEM
Application: Chainsaw cutting chain
Verify Fitment Before Ordering
Before ordering this chain, confirm the following specifications on your current chain or guide bar:
Bar Length: 20 inch
Pitch: .325 inch
Gauge: .063 inch
Drive Links: 81
All four specifications must match. A .063 gauge chain will not fit correctly on .050 or .058 gauge bars. Model number alone does not guarantee fitment because many Stihl chainsaws can use different bar and chain combinations.
Common Compatible Stihl Models
This OEM Stihl 3689-005-0081 chain may fit the following Stihl chainsaw models when equipped with a 20 inch .325 pitch .063 gauge guide bar:
MS 260 Pro
MS 261
MS 270
MS 271 Farm Boss
MS 290 Farm Boss
MS 291 Farm Boss
MS 310
MS 311
Wood Boss series
Important: Fitment depends on your guide bar specifications. Always verify bar length, pitch, gauge, and drive link count before ordering.
Features
Genuine OEM Stihl chainsaw chain
Stihl part number 3689-005-0081
26RM3 Rapid Micro chain loop
20 inch bar compatibility
.325 inch pitch
.063 inch gauge
81 drive links
Semi-chisel cutter design
Designed for smooth cutting and dependable performance
Good choice for firewood, farm, ranch, landowner, and professional use
Factory-correct chain for compatible Stihl bar and saw setups
Why Choose an OEM Stihl Rapid Micro Chain?
A genuine OEM Stihl chain is built to match Stihl guide bar and chainsaw specifications. Using the correct OEM chain helps support proper fit, smooth cutting, reliable oiling, and long service life.
The 26RM3 Rapid Micro chain uses a semi-chisel cutter design that is durable, easy to maintain, and well suited for a wide range of cutting conditions. Choosing the correct chain helps reduce fitment problems, poor cutting performance, and unnecessary wear caused by using the wrong pitch, gauge, or drive link count.
Part Number / Search Terms
This Stihl chainsaw chain may also be searched as:
3689-005-0081
36890050081
Stihl 26RM3
Stihl 26RM3 81
Stihl 26RM3 81DL
Stihl 20 inch .325 .063 chain
Stihl .325 .063 81 drive link chain
Stihl MS 271 20 inch chain
Stihl Farm Boss 20 inch chain
Stihl Rapid Micro chain
Frequently Asked Questions
Is Stihl 3689-005-0081 an OEM chain?
Yes. Stihl 3689-005-0081 is a genuine OEM Stihl chainsaw chain.
What chain model is this?
This is a Stihl 26RM3 Rapid Micro chainsaw chain.
What bar length does this chain fit?
This chain is for compatible 20 inch guide bars.
What pitch is this chain?
This chain has a .325 inch pitch.
What gauge is this chain?
This chain has a .063 inch gauge.
How many drive links does this chain have?
This chain has 81 drive links.
Will this chain fit my Stihl MS 271 Farm Boss?
It may fit an MS 271 Farm Boss if the saw is equipped with a 20 inch bar that uses .325 pitch, .063 gauge, and 81 drive links. Always verify your bar specifications before ordering.
Will this fit a .050 or .058 gauge bar?
No. This is a .063 gauge chain and will not fit correctly on .050 or .058 gauge bars.
What does Rapid Micro mean?
Rapid Micro is Stihl’s semi-chisel chain style. It is designed for dependable cutting performance, durability, and easier sharpening compared to more aggressive full-chisel chains.
How do I confirm this is the right chain?
Check the markings on your guide bar or current chain. You need to confirm bar length, pitch, gauge, and drive link count before ordering.
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