Saw Chains · SKU B0DP1Z3FNT
$22 Amazon rating ★ 4.6
18 Inch Chainsaw Chain for STIHL 3639 005 0068 26RS68 / 26RS 68, 18" Replacement Chain for Stihl Chainsaw 025, MS250, and MS251 36390050068
From our Amazon listing, checked September 25, 2026. Model and part-number matches are the seller's; confirm against the part on your machine.
The seller's listing names these models as compatible. Always confirm the model number stamped on your machine before ordering.
Not sure which part you need? See our guide: How to measure your bar or How to read the stamp on your guide bar.
Match three numbers: pitch, gauge, and drive-link count. All three must match the stamp on your current bar. If even one is off, the chain won't fit safely.
Pitch is the distance between any three consecutive rivets, divided by two. Gauge is the thickness of the drive links — measure with a caliper or check the bar stamp. Our guide covers both in detail.
With proper tension and occasional sharpening, an aftermarket chain lasts 3–5 cords of firewood or about 5 hours of active cutting — roughly the same as OEM.
Absolutely sharpen it. A quality replacement chain can be sharpened 3–5 times before the cutters are too short. Keep a round file matched to the cutter diameter.
This part is sold and shipped through Amazon. Check the live listing for current price, stock, delivery and return options.
Affiliate disclosure: we may earn a commission when you purchase through this link, at no extra cost to you.
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