§ Fitment Guide

Husqvarna 450e chain size & replacement chart

The Husqvarna 450e takes a .325" pitch, .050" / .058" gauge chain. Below: every factory bar length with its exact drive-link count, cross-referenced to Oregon part numbers, plus the OEM parts list.

Fitment matrix

Bar length	Pitch	Gauge	Drive links	Oregon chains	Bars / combos
13"	.325"	.050" / .058"	56	21LGX056G 21LPX056G	130MLBK095 130TXLBK095 138PXLBK095 138RNBK095 138SLBK095
15"	.325"	.050" / .058"	64	21LPX064G 21LPX064X2	150MLBK095 150TXLBK095 158PXBK095 158PXLBK095 158SLGK095 158RNBK095 158SLBK095 158VXLGK095
16"	.325" or 3/8"	.050" / .058"	66	20BPX066G 20LGX066G 20LPX066X2 20LPX066G 95TXL066G M66 21LGX066G 21LPX066X2 21LPX066G J66	160MLBK095 160RNBK095 160TXLBK095 160VXLGK095 168PXBK095 168PXLBK095 168RNBK095 168VXLGK095 168ATMK095 578482 579778
18"	.325" or 3/8" or 325"	.050" / .058"	72	20BPX072G 20LGX072G 20LPX072X2 20LPX072G 95TXL072G M72X3 M72 21BPX072G 21LGX072G 21LPX072G 21LPX072X2 J72	180MLBK095 180ATMZ095 180MPBK095 180TXLBK095 180VXLGK095 188PXBK095 188SFGK095 188PXLBK095 188RNBK095 188SLGK095 188VXLGK095 188ATMK095 578764 579809
20"	.325" or 3/8"	.050" / .058"	78, 80	J78-21 20BPX078G 20LGX078G 20LPX078X2 20LPX078G 95TXL080G H78T H78-21 H78 M78-21 M78 M80 21LGX078G 21LPX078G J78	200TXLBK095 200RNBK095 200VXLGK095 208PXBK095 208RNBK095 208VXLGK095 200ATMZ095 208ATMK095 577330 579810

Source: Oregon part-finder, retrieved 2026-07-06. Part numbers link to the manufacturer's spec page. Always confirm drive-link count against your current chain before ordering.

Compatible chains in our shop

Saw Chains

18 Inch Chainsaw Chain

pitch 3/8 · gauge .050" · $19

Saw Chains

1PC 20 Inch Replacement Chain

pitch 3/8 · gauge .050" · $25

Saw Chains

1PC 24'' inch Chainsaw Saw Chain

pitch 3/8 · gauge .050" · $22

Saw Chains

20 in. Chainsaw Chain - 70 Link

pitch 3/8 · gauge .050" · $14

Saw Chains

20 Inch Chainsaw Chain

pitch 3/8 · gauge .050" · $23

Saw Chains

20" replacement saw chain

pitch .325 · gauge .050" · $18

How to confirm the fit

Read your bar. The pitch and gauge are stamped on the guide bar near the saw body — e.g. 3/8" LP .050".
Count drive links. Lay the old chain flat and count the teeth that ride inside the bar groove. This number must match exactly; length in inches is not enough.
Match all three. Pitch, gauge and drive-link count all have to agree with a row in the table above. Two of three is not a fit.

Measuring a chainsaw chain's gauge with a caliper

Watch: how to identify chain pitch and gauge

Oregon Products: Identifying Chain Pitch and Chain Gauge

Official video from Oregon Products, the manufacturer behind the cross-reference part numbers above.

OEM parts list — Husqvarna 450e

219 genuine Husqvarna part numbers by assembly, extracted from the official parts list (IPL, Husqvarna 445, 450, 445e, 450e, 2010-09), retrieved 2026-07-06. Cutting-system assemblies are expanded — that's where chain, bar and sprocket wear parts live.

Chain Brake & Clutch Cover 37 parts

Ref	OEM part no.	Description	Qty
1	`544 21 72-01`	CLUTCH COVER ASSY	1
2	`504 54 28-01`	COVER LID	1
3	`537 04 30-01`	BRAKE BAND ASSY	1
4	`544 08 30-01`	WEAR PROTECTION	1
5	`503 85 52-01`	GUIDE BUSHING	1
6	`503 46 59-01`	BRAKE SPRING	1
7	`544 08 29-01`	COVER LID	1
8	`503 89 08-02`	KNEE JOINT ASSY	1
9	`503 89 29-01`	PIN	1
10	`735 31 08-20`	E- CLIP	1
11	`537 39 29-01`	SCREW	1
12	`537 34 72-01`	GEAR ASSY	1
13	`537 39 26-01`	HEAT PROTECTOR	1
14	`544 35 75-01`	LABEL	1
15	`503 21 70-10`	SCREW CCRPANT	10
16	`525 35 43-01`	BEARING SLEEVE	1
17	`544 25 05-01`	WEAR PLATE	1
18	`537 34 78-01`		1
1	`544 09 79-01`	CLUTCH COVER ASSY	1
2	`735 31 08-20`	E- CLIP	1
3	`537 28 66-01`	PAWL	1
4	`540 06 33-01`	CHAIN GUIDE	1
5	`537 01 74-01`	BEARING SLEEVE	1
6	`503 89 08-02`	KNEE JOINT ASSY	1
7	`503 46 59-01`	BRAKE SPRING	1
8	`503 85 52-01`	GUIDE BUSHING	1
9	`544 08 29-01`	COVER LID	1
10	`503 21 70-10`	SCREW CCRPANT	7
11	`544 08 30-01`	WEAR PROTECTION	1
12	`537 04 30-01`	BRAKE BAND ASSY	1
13	`503 89 29-01`	PIN	1
14	`537 39 70-01`	WORM SCREW	1
15	`537 07 94-02`	WORM WHEEL	1
16	`740 48 07-02`	O- RING	1
17	`503 23 00-63`	WASHER	1
18	`544 37 68-01`	LABEL	1
19	`503 22 00-01`		1

Clutch & Oil Pump 8 parts

Ref	OEM part no.	Description	Qty
1	`537 11 05-03`	CLUTCH ASSY	1
2	`537 35 91-01`	CLUTCH SPRING	2
3	`503 87 30-72`		1
4	`503 25 52-01`	NEEDLE BEARING	1
5	`503 93 18-01`	PUMP PINION	1
6	`540 05 79-01`	PUMP PISTON	1
7	`537 15 48-01`	PUMP CYLINDER	1
8	`544 08 42-01`		1

Cylinder Cover 3 parts

Ref	OEM part no.	Qty
1	`544 34 83-03`	1
2	`522 70 92-01`	1
3	`503 89 47-01`	3

Starter 22 parts

Ref	OEM part no.	Description	Qty
1	`544 07 16-02`		1
2	`544 07 15-01`		1
4	`540 05 75-02`	SPRING CASSETTE ASSY	1
5	`503 21 28-10`	SCREW CCRPANT	2
6	`537 09 25-01`		1
7	`503 21 77-16`	SCREW IHSCT	1
8	`505 30 51-25`	STARTER CORD	1
9	`537 23 25-01`	STARTER HANDLE	1
10	`503 21 73-21`	SCREW	4
12	`544 08 15-01`		1
1	`544 15 85-02`		1
2	`544 15 84-01`		1
4	`540 05 75-02`	SPRING CASSETTE ASSY	1
5	`503 21 28-10`	SCREW CCRPANT	2
6	`537 42 32-01`		1
7	`537 42 34-01`		1
8	`537 42 33-01`		1
9	`537 42 66-01`		1
10	`505 30 51-25`	STARTER CORD	1
11	`537 23 25-01`	STARTER HANDLE	1
12	`503 21 73-21`	SCREW	4
14	`544 08 15-01`		1

Ignition System 9 parts

Ref	OEM part no.	Description	Qty
1	`544 11 18-01`		1
2	`537 24 56-01`	STARTER PAWL	2
3	`501 81 99-03`	SCREW	2
4	`503 23 00-42`	WASHER	2
5	`529 27 11-01`	SPRING	2
6	`503 22 04-01`	NUT	1
7	`573 93 57-01`		1
8	`510 10 15-01`	WIRING ASSY	1
9	`503 20 02-20`		2

Muffler 7 parts

Ref	OEM part no.	Description	Qty
1	`544 14 77-02`	MUFFLER ASSY	1
2	`503 86 36-01`		1
3	`544 08 31-04`		1
4	`544 08 44-01`		1
5	`725 53 68-55`	SCREW IHSCM	2
6	`724 12 87-59`	SCREW CRPANM	1
7	`544 97 20-01`	Set of Gaskets	1

Carburetor & Air Filter 23 parts

Ref	OEM part no.	Description	Qty
1	`544 08 23-01`	PIPE ASSY	1
2	`503 20 02-16`	SCREW IHSCFM	4
3	`544 08 38-01`	INTERMEDATE WALL	1
4	`544 08 40-01`	FLANGE	1
5	`503 21 07-25`	SCREW IHSCFT	2
6	`544 08 41-01`	FLANGE	1
7	`544 14 82-01`	THROTTLE	1
9	`504 00 34-01`		1
10	`544 23 14-01`	SHACKLE	1
11	`503 93 66-01`	air purge	1
12	`544 40 19-01`	suction hose	1
13	`544 12 97-01`	return hose	1
14	`544 35 99-02`	CONTROL	1
15	`503 21 07-50`	SCREW IHSCFT	2
16	`544 08 08-03`	Felt	1
17	`502 08 10-01`	SHAFT ASSY	1
18	`502 08 11-01`	SPRING	1
19	`502 08 08-01`	COLLAR	1
20	`502 08 12-01`	VALVE	1
21	`503 48 18-01`	SCREW	1
22	`537 38 52-01`	CLIP	1
23	`502 08 09-01`	ROD	1
24	`735 58 30-00`		1

Cylinder Piston 22 parts

Ref	OEM part no.	Description	Qty
1	`544 11 99-02`		1
2	`544 08 84-03`		1
5	`503 25 63-01`		1
6	`544 10 87-01`	GASKET	1
7	`544 10 92-01`	GASKET	1
8	`503 20 05-27`	SCREW IHSCM	4
9	`544 87 07-01`		1
10	`503 23 51-11`	SPARK PLUG	1
11	`540 05 73-01`	SUPPORT	1
12	`503 55 22-01`		1
13	`544 97 20-01`	Set of Gaskets	1
1	`544 11 98-02`		1
2	`544 08 89-03`		1
5	`503 25 63-01`		1
6	`544 10 87-01`	GASKET	1
7	`544 10 92-01`	GASKET	1
8	`503 20 05-27`	SCREW IHSCM	4
9	`544 87 07-01`		1
10	`503 23 51-11`	SPARK PLUG	1
11	`540 05 73-01`	SUPPORT	1
12	`503 55 22-01`		1
13	`544 97 20-01`	Set of Gaskets	1

Crankshaft 4 parts

Ref	OEM part no.	Description	Qty
1	`525 60 50-01`	CRANKSHAFT ASSY	1
2	`544 06 20-01`	BEARING	2
3	`544 01 38-01`	SEALING	2
4	`503 25 63-01`		1

Crankcase 26 parts

Ref	OEM part no.	Description	Qty
1	`537 43 82-01`	CRANKCASE	1
2	`503 87 58-02`	STIFFENING PLATE	1
3	`503 87 54-02`	BAR BOLT	1
4	`537 33 46-01`	BAR BOLT	1
5	`544 03 64-01`	BAR BOLT	1
6	`503 24 09-05`	NEEDLE ROLLER	1
7	`530 02 61-19`	CHECK VALVE	1
8	`537 40 35-01`	FILTER	1
9	`544 08 33-01`	OIL SCREEN	1
10	`544 33 16-01`	GUIDE PIN	3
11	`503 86 93-01`	SUPPORT	2
12	`544 11 12-01`		1
13	`537 21 50-01`		1
14	`503 57 89-01`	HOLDER	1
15	`503 88 63-01`	PIN	1
16	`544 31 62-01`		2
17	`501 00 76-01`	SUPPORT	2
18	`503 21 51-03`	SCREW IHSCT	1
19	`544 09 40-01`	CHAIN GUIDE PLATE	1
20	`503 21 70-10`	SCREW CCRPANT	1
21	`503 90 59-01`	SPIKE	1
22	`503 21 75-20`	SCREW IHSCFT	2
23	`544 08 26-01`	HAND GUARD	1
24	`503 89 24-01`	LOCK	1
25	`503 89 30-01`	SCREW	2
26	`503 43 65-01`		1

Fuel Tank 19 parts

Ref	OEM part no.	Description	Qty
1	`537 43 79-01`		1
2	`503 21 28-10`	SCREW CCRPANT	1
3	`720 18 25-20`	PARALLEL PIN	1
4	`544 09 97-01`	THROTTLE TRIGGER	1
5	`544 09 99-01`	SPRING	1
6	`544 09 98-01`	THROTTLE LOCKOUT	1
7	`504 12 22-01`	HANDLE INSERT	1
8	`504 09 88-01`	THROTTLE CABLE ASSY	1
9	`544 12 86-01`	FUEL HOSE	1
10	`503 44 32-01`	FUEL FILTER	1
11	`544 12 97-01`	return hose	1
12	`544 11 12-01`		1
13	`537 21 50-01`		1
14	`503 57 89-01`	HOLDER	1
15	`544 37 50-01`	LABEL	1
16	`501 00 76-01`	SUPPORT	1
17	`544 10 12-01`	ANTIVIBRATION ELEMENT	2
18	`721 12 63-39`	GROOVED PIN	1
19	`537 35 95-01`		1

Handle 1 parts

Ref	OEM part no.	Description	Qty
1	`544 08 39-01`	handtag	1

Carburetor 33 parts

Ref	OEM part no.	Description	Qty
1	`506 45 04-01`	CARBURETTOR C1M- EL37B	1
2	`502 07 82-01`	COLLAR	1
3	`502 07 83-01`	COLLAR	1
4	`502 07 84-01`	SCREW	1
5	`502 07 86-01`	SPRING	1
6	`502 07 87-01`	SPRING	1
7	`503 47 90-01`	SCREW	1
8	`503 47 96-01`	SCREW	1
9	`503 47 97-01`	VALVE	1
10	`503 48 00-01`	PIN RETAINING SCREW	1
11	`503 48 01-01`	SCREW	1
12	`503 48 05-01`	SCREW	4
13	`503 48 11-01`	PIECE	1
14	`503 48 18-01`	SCREW	2
15	`503 53 56-01`	PLUG WELCH	2
16	`503 53 57-01`	STRAINER	1
17	`503 66 59-01`	LEVER	1
20	`502 07 89-01`	COVER	1
21	`537 38 33-01`	SCREW	1
22	`537 38 34-01`	SPRING	1
23	`537 38 37-01`	COVER	1
24	`544 23 77-01`	NOZZLE ASSY	1
26	`502 07 91-01`	LEVER	1
27	`505 10 17-01`	LEVER	1
28	`502 07 94-01`	SHAFT ASSY	1
29	`502 07 95-01`	SHAFT ASSY	1
30	`502 24 77-01`	VALVE	1
31	`502 07 98-01`	COLLAR	1
33	`502 08 17-01`	LEVER	1
34	`502 07 99-01`	SCREW	1
35	`502 08 00-01`	SCREW	1
36	`502 08 01-01`	VALVE	1
38	`544 11 95-01`		1

Accessories 1 parts

Ref	OEM part no.	Description	Qty
1	`5035585-04`		1

Winter Kit 4 parts

Ref	OEM part no.	Description	Qty
1	`544 46 45-01`	Winter kit	1
2	`503 21 70-16`		2
3	`544 46 45-02`	Winter kit e-series	1
4	`503 21 70-16`		2

Official Husqvarna resources

Husqvarna manuals & downloads — owner's manual for the 450e, including tensioning and maintenance intervals.
Husqvarna parts diagrams (IPL) — exploded parts diagrams and OEM part numbers.

FAQ

What size chain does a Husqvarna 450e take?

The Husqvarna 450e runs a .325" pitch, .050" / .058" gauge chain. Available bar lengths: 13", 15", 16", 18", 20". Match the drive-link count to your bar (see the table above).

How do I know which gauge my 450e chain is?

Check the number stamped on your guide bar near the tail, or measure the drive-link thickness with calipers. Common gauges for the 450e are .050" / .058".

Can I put a longer bar on my Husqvarna 450e?

Oregon lists 13", 15", 16", 18", 20" bars for the 450e. Stay within this range — a longer bar than the engine is rated for cuts slowly and accelerates wear.