Stihl MS251 chain size

Chainsaw drawing: the bar and chain are the parts this page is about

The chain for your Stihl MS251

Which bar is on your saw?

Which chain is on it now?

12" bar

Pitch: 3/8" LP
Gauge: .050"
Drive links: 44

Oregon S44
Same as Stihl 63PM3, Husqvarna H36
File 5/32"

14" bar

Pitch: 3/8" LP
Gauge: .050"
Drive links: 50

Oregon S50
Same as Stihl 63PM3, Husqvarna H36
File 5/32"

16" bar

Pitch: 3/8" LP
Gauge: .050"
Drive links: 55

Oregon S55
Same as Stihl 63PM3, Husqvarna H36
File 5/32"

16" bar

Pitch: .325"
Gauge: .063"
Drive links: 62

Oregon L62
Same as Stihl 26RM3
File 3/16"

18" bar

Pitch: .325"
Gauge: .063"
Drive links: 68

Oregon L68
Same as Stihl 26RM3
File 3/16"

Bar mount A074

Buy this chain

Oregon S44, 44 drive links

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Check pitch, gauge and drive links on the listing before you order. How this works

All bar lengths for the Stihl MS251

Chain for each bar length
Bar	Pitch	Gauge	Drive links	Chain
12"	3/8" LP	.050"	44	S44
14"	3/8" LP	.050"	50	S50
16"	3/8" LP	.050"	55	S55
16"	.325"	.063"	62	L62
18"	.325"	.063"	68	L68

The Stihl MS251 chain depends on the bar. 12" bar: 3/8" LP, .050", 44 drive links; 14" bar: 3/8" LP, .050", 50 drive links; 16" bar: 3/8" LP, .050", 55 drive links; 16" bar: .325", .063", 62 drive links; 18" bar: .325", .063", 68 drive links.

Stihl genuine part numbers

If you prefer the maker's own parts, these are the numbers to ask for at a dealer.

Stihl bar and chain part numbers
Bar	Chain part no.	Bar part no.	Pitch / gauge	Drive links
12"	63 PM3 44	3005 000 4805	3/8" / .050"	44
14"	63 PM3 50	3005 000 4809	3/8" / .050"	50
16"	26 RM3 62	3005 000 4713	.325" / .063"	62
16"	63 PM3 55	3005 000 4813, 3005 008 4813	3/8" / .050"	55
18"	23 RM3 68	3005 008 7017, 3005 810 7017	.325" / .050"	68
18"	26 RM3 68	3005 008 4717, 3005 810 4717	.325" / .063"	68
18"	63 PM3 61	3005 000 4817, 3005 008 4817	3/8" / .050"	61

Check the chain on your saw

Drawing: pitch is the distance between three rivets divided by two — **Pitch** Measure across three rivets and divide by two. Common pitches are 1/4", .325", 3/8" and .404".

Drawing: gauge is the thickness of the drive link in the bar groove — **Gauge** The thickness of the drive link that rides in the bar groove: .043", .050", .058" or .063".

Drawing: count the drive links, the tabs under the chain — **Drive links** Lay the chain flat and count the tabs underneath. Mark one with a paint pen so you know where you started.

Find pitch and gauge from the number on a drive link

Stamp number

Type the number on a drive link

See all stamp numbers

Drive link stamp number to pitch and gauge
Stamp	Pitch	Gauge
11	3/4"	.122"
16	.404"	.063"
18	.404"	.080"
20	.325"	.050"
21	.325"	.058"
22	.325"	.063"
25	1/4"	.050"
26	.404"	.058"
27	.404"	.063"
33	.325"	.050"
34	.325"	.058"
35	.325"	.063"
50	.404"	.050"
51	.404"	.058"
52	.404"	.063"
58	.404"	.058"
59	.404"	.063"
68	.404"	.063"
72	3/8"	.050"
73	3/8"	.058"
75	3/8"	.063"
80	.325" LP	.043"
90	3/8" LP	.043"
91	3/8" LP	.050"
95	.325"	.050"

Questions people ask

What size chain does a Stihl MS251 take?

How many drive links is a Stihl MS251 chain?

It depends on the bar: 44 on a 12" bar, 50 on a 14" bar, 55 on a 16" bar, 62 on a 16" bar, 68 on a 18" bar. The bar length is usually printed near the mount.

What bar fits a Stihl MS251?

A bar with the A074 mount, in one of these lengths: 12", 14", 16", 18".

Other saws with the same chain

All saws that take S44 All saws that take S50 All saws that take S55

Related Stihl saws

Every Stihl model