Stihl 3689-005-0081 OEM Chainsaw Chain (26RM3 • 20")

Genuine Stihl OEM Rapid Micro chain engineered for mid‑ to professional‑grade Stihl saws. This is the factory‑correct 26RM3 chain loop — not aftermarket — sold by P&P Small Engines.

Product Overview

• Brand: Stihl (OEM)

• Stihl Part Number: 3689‑005‑0081

• Chain Model: 26RM3 (Rapid Micro)

• Bar Length: 20 inch

• Pitch: .325" (8.35 mm)

• Gauge: .063" (1.6 mm)

• Drive Links: 81

• Cutter Type: Rapid Micro (semi‑chisel)

• Stock Number: 36890050081

• Condition: New OEM

This is the exact OEM chain specified by Stihl for saws equipped with a 20" .325 pitch .063 gauge guide bar.

Verify Fitment in 30 Seconds

Before ordering, confirm the following on your guide bar or current chain:

• Bar Length: 20"

• Pitch: .325"

• Gauge: .063"

• Drive Links: 81

⚠️ .063 gauge chains will not fit .050 or .058 gauge bars.

If you’re unsure, contact P&P Small Engines and we’ll help verify compatibility before you order.

Compatible Stihl Models

This OEM Stihl chain fits the following models when equipped with a 20" .325 pitch .063 gauge 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

⚠️ Model alone does not guarantee fitment — bar specifications must match.

Product Specifications

• Brand: Stihl (OEM)

• OEM Part Number: 3689‑005‑0081

• Chain Model: 26RM3 Rapid Micro

• Pitch: .325"

• Gauge: .063"

• Drive Links: 81

• Bar Length Compatibility: 20"

• Use Type: Firewood cutting, landowner use, professional cutting

Why Choose an OEM Stihl Rapid Micro Chain?

• ✅ Exact factory specifications for proper fit

• ✅ Semi‑chisel cutters for durability and easy sharpening

• ✅ Smooth cutting performance with reduced vibration

• ✅ Designed specifically for Stihl guide bars

• ✅ Avoids fitment and wear issues common with aftermarket chains

OEM Stihl chains deliver reliable performance and long service life.

Why Buy From P&P Small Engines?

• 🔧 Small‑engine specialists — not a big‑box seller

• 🔧 Genuine OEM Stihl parts only

• 🔧 Fitment support before purchase

• 🔧 Fast, careful shipping

We help you get the right chain the first time.

Frequently Asked Questions

Q: Will this chain fit my MS 271 Farm Boss?
A: Yes, if your MS 271 is equipped with a 20" .325 pitch .063 gauge bar.

Q: Is this chain OEM Stihl?
A: Yes. This is a genuine Stihl OEM chain, part number 3689‑005‑0081.

Q: What does Rapid Micro mean?
A: Rapid Micro is Stihl’s semi‑chisel cutter design, offering durability and easy maintenance.

Common Search Terms

• Stihl 3689‑005‑0081 chain

• Stihl 26RM3 chain

• Stihl MS 271 Farm Boss chain OEM

• Stihl .325 .063 20 inch chain

• Stihl Rapid Micro chain

Questions?

If you need help confirming bar compatibility or selecting the correct chain, contact P&P Small Engines — we’re happy to help.