Easy
15-30 minutes
This is an important part of the chain tensioner which in conjunctions with tension screw (sold separately) allow user to tighten or loosen the chain. It is a genuine OEM sourced replacement part designed for use with Husqvarna chainsaws. This part is made out of plastic material and it is sold individually. If the chainsaw bar doesn’t adjust when you turn the tension nut or the screw are usually worn or damaged.
Nut 501452702
OEM part for: Husqvarna, Jonsered
Part Number: 501452702
$5.29
In Stock
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Compatibility
This part will fit the following 179 machines
Husqvarna
42 (1988-10) Chainsaw View Diagrams & Manuals
42 (1992-03) Chainsaw View Diagrams & Manuals
42 (1994-04) Chainsaw View Diagrams & Manuals
42 (1994-12) Chainsaw View Diagrams & Manuals
44 (1980-04) Chainsaw View Diagrams & Manuals
44 (1981-02) Chainsaw View Diagrams & Manuals
44 (1983-03) Chainsaw View Diagrams & Manuals
44 (1984-01) Chainsaw View Diagrams & Manuals
44 (1985-05) Chainsaw View Diagrams & Manuals
44 (1985-11) Chainsaw View Diagrams & Manuals
44 (1986-05) Chainsaw View Diagrams & Manuals
44 (1987-01) Chainsaw View Diagrams & Manuals
44 (1988-08) Chainsaw View Diagrams & Manuals
444 (1980-02) Chainsaw View Diagrams & Manuals
444 (1981-03) Chainsaw View Diagrams & Manuals
444 (1983-01) Chainsaw View Diagrams & Manuals
444 (1984-01) Chainsaw View Diagrams & Manuals
55 EU1 (2007-02) Chainsaw View Diagrams & Manuals
55 Rancher (2007-02) Chainsaw View Diagrams & Manuals
55 Rancher EPA (2006-02) Chainsaw View Diagrams & Manuals
55 Rancher EPA (1998-08) Chainsaw View Diagrams & Manuals
55 Rancher EPA (2000-05) Chainsaw View Diagrams & Manuals
55 Rancher EPA (2004-01) Chainsaw View Diagrams & Manuals
50 (1985-02) Chainsaw View Diagrams & Manuals
50 (1986-06) Chainsaw View Diagrams & Manuals
50 (1987-06) Chainsaw View Diagrams & Manuals
50 (1988-03) Chainsaw View Diagrams & Manuals
50 (1989-01) Chainsaw View Diagrams & Manuals
50 (1983-01) Chainsaw View Diagrams & Manuals
50 (1990-01) Chainsaw View Diagrams & Manuals
51 (1990-01) Chainsaw View Diagrams & Manuals
51 (1991-10) Chainsaw View Diagrams & Manuals
51 (1994-06) Chainsaw View Diagrams & Manuals
51 (1998-06) Chainsaw View Diagrams & Manuals
51 (2000-05) Chainsaw View Diagrams & Manuals
51 EPA (1998-06) Chainsaw View Diagrams & Manuals
51 EPA (2000-05) Chainsaw View Diagrams & Manuals
55 (1990-01) Chainsaw View Diagrams & Manuals
55 (1991-10) Chainsaw View Diagrams & Manuals
55 (1994-06) Chainsaw View Diagrams & Manuals
55 (1998-06) Chainsaw View Diagrams & Manuals
55 (2000-05) Chainsaw View Diagrams & Manuals
55 (2006-02) Chainsaw View Diagrams & Manuals
55 (2007-02) Chainsaw View Diagrams & Manuals
55 EPA (1998-06) Chainsaw View Diagrams & Manuals
55 EPA (2000-05) Chainsaw View Diagrams & Manuals
55 EU1 (2006-02) Chainsaw View Diagrams & Manuals
362 (1999-05) Chainsaw View Diagrams & Manuals
362 (1999-11) Chainsaw View Diagrams & Manuals
362 (2003-10) Chainsaw View Diagrams & Manuals
362 (2005-05) Chainsaw View Diagrams & Manuals
362 (2007-01) Chainsaw View Diagrams & Manuals
362 EPA (1999-11) Chainsaw View Diagrams & Manuals
362 EPA (2001-10) Chainsaw View Diagrams & Manuals
362 EPA (2003-10) Chainsaw View Diagrams & Manuals
362 EPA (2005-05) Chainsaw View Diagrams & Manuals
371 (1999-05) Chainsaw View Diagrams & Manuals
371 EPA (1999-05) Chainsaw View Diagrams & Manuals
372 (1999-11) Chainsaw View Diagrams & Manuals
372 (2003-10) Chainsaw View Diagrams & Manuals
372 (2005-05) Chainsaw View Diagrams & Manuals
372 (2007-01) Chainsaw View Diagrams & Manuals
372 EPA (1999-11) Chainsaw View Diagrams & Manuals
372 EPA (2001-10) Chainsaw View Diagrams & Manuals
372 EPA (2003-10) Chainsaw View Diagrams & Manuals
372 EPA (2005-05) Chainsaw View Diagrams & Manuals
334 T (2003-05) Chainsaw View Diagrams & Manuals
334 T (2003-11) Chainsaw View Diagrams & Manuals
334 T (2004-01) Chainsaw View Diagrams & Manuals
334 T (2005-03) Chainsaw View Diagrams & Manuals
335 XPT (1997-01) Chainsaw View Diagrams & Manuals
335 XPT (1999-03) Chainsaw View Diagrams & Manuals
335 XPT (2001-05) Chainsaw View Diagrams & Manuals
336 (2003-10) Chainsaw View Diagrams & Manuals
336 (2004-01) Chainsaw View Diagrams & Manuals
336 (2005-03) Chainsaw View Diagrams & Manuals
336 (2006-09) Chainsaw View Diagrams & Manuals
338 XPT (2003-05) Chainsaw View Diagrams & Manuals
338 XPT (2003-11) Chainsaw View Diagrams & Manuals
338 XPT (2004-01) Chainsaw View Diagrams & Manuals
338 XPT (2005-03) Chainsaw View Diagrams & Manuals
339 XP (2003-10) Chainsaw View Diagrams & Manuals
339 XP (2004-01) Chainsaw View Diagrams & Manuals
339 XP (2006-09) Chainsaw View Diagrams & Manuals
339 XPT (2005-03) Chainsaw View Diagrams & Manuals
238 (1985-11) Chainsaw View Diagrams & Manuals
238 (1986-02) Chainsaw View Diagrams & Manuals
238 (1986-10) Chainsaw View Diagrams & Manuals
238 (1987-04) Chainsaw View Diagrams & Manuals
238 (1987-11) Chainsaw View Diagrams & Manuals
242 (1987-06) Chainsaw View Diagrams & Manuals
242 (1989-05) Chainsaw View Diagrams & Manuals
242 (1990-01) Chainsaw View Diagrams & Manuals
242 (1994-04) Chainsaw View Diagrams & Manuals
242 (1998-05) Chainsaw View Diagrams & Manuals
242 (1998-06) Chainsaw View Diagrams & Manuals
246 (1994-12) Chainsaw View Diagrams & Manuals
254 (1986-04) Chainsaw View Diagrams & Manuals
254 (1987-01) Chainsaw View Diagrams & Manuals
254 (1988-02) Chainsaw View Diagrams & Manuals
254 (1990-05) Chainsaw View Diagrams & Manuals
254 (1992-10) Chainsaw View Diagrams & Manuals
254 (1994-06) Chainsaw View Diagrams & Manuals
254 (1996-01) Chainsaw View Diagrams & Manuals
254 (1998-03) Chainsaw View Diagrams & Manuals
254 (2001-09) Chainsaw View Diagrams & Manuals
257 (1994-06) Chainsaw View Diagrams & Manuals
257 (1996-01) Chainsaw View Diagrams & Manuals
257 (1998-03) Chainsaw View Diagrams & Manuals
257 (2001-09) Chainsaw View Diagrams & Manuals
261 EPA (1998-03) Chainsaw View Diagrams & Manuals
261 EPA (1999-06) Chainsaw View Diagrams & Manuals
262 (1990-03) Chainsaw View Diagrams & Manuals
262 (1991-03) Chainsaw View Diagrams & Manuals
262 (1992-11) Chainsaw View Diagrams & Manuals
262 (1994-06) Chainsaw View Diagrams & Manuals
262 (1996-01) Chainsaw View Diagrams & Manuals
133 (1980-10) Chainsaw View Diagrams & Manuals
154 (1983-05) Chainsaw View Diagrams & Manuals
154 (1983-11) Chainsaw View Diagrams & Manuals
154 (1984-10) Chainsaw View Diagrams & Manuals
154 (1985-08) Chainsaw View Diagrams & Manuals
234 (1983-01) Chainsaw View Diagrams & Manuals
234 (1984-04) Chainsaw View Diagrams & Manuals
238 (1984-01) Chainsaw View Diagrams & Manuals
238 (1985-05) Chainsaw View Diagrams & Manuals
327PT5S (2011-06) Pruner View Diagrams & Manuals
327PT5S (2012-01) Pruner View Diagrams & Manuals
262XP Chainsaw View Diagrams & Manuals
PA1100 (537183323, 537183325) Pole Saw Attachment View Diagrams & Manuals
261 (1998-03) Epa, Usa Only View Diagrams & Manuals
261 (1999-06) Epa Chain Saw View Diagrams & Manuals
333 (2000-10) Japan View Diagrams & Manuals
536LIPX Pole Pruner View Diagrams & Manuals
525 PT5S Pole Pruner View Diagrams & Manuals
536LIP4 Pole Pruner View Diagrams & Manuals
536LIPT5 Pole Pruner View Diagrams & Manuals
362 XP SPECIAL EPA (20070100001-Current) Chainsaw View Diagrams & Manuals
362 XP SPECIAL EPA (20051800001-20070100000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL EPA (20034000001-20051800000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL EPA (20014000001-20034000000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL EPA (19994500001-20014000000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL (20070100001-Current) Chainsaw View Diagrams & Manuals
362 XP SPECIAL (20051800001-20070100000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL (20034000001-20051800000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL (20014000001-20034000000) Chainsaw View Diagrams & Manuals
362 XP SPECIAL (19994500001-20014000000) Chainsaw View Diagrams & Manuals
371 XP EPA (19991800001-Current) Chainsaw View Diagrams & Manuals
372 XP EPA (20014000001-20034000000) Chainsaw View Diagrams & Manuals
372 XP EPA (19994500001-20014000000) Chainsaw View Diagrams & Manuals
262 XPH (1993-12) Chainsaw View Diagrams & Manuals
530IPT5 Pole Saw View Diagrams & Manuals
525DEPS Pole Saw View Diagrams & Manuals
530iP4 Pole Saw View Diagrams & Manuals
Jonsered
2063 (1997-11) Chain Saw View Diagrams & Manuals
2063 (1999-03) Chain Saw View Diagrams & Manuals
2063 EPA (1999-03) Chain Saw View Diagrams & Manuals
2071 (1999-03) Chain Saw View Diagrams & Manuals
2071 EPA (1999-03) Chain Saw View Diagrams & Manuals
2163 (2000-04) Chain Saw View Diagrams & Manuals
2163 (2001-10) Chain Saw View Diagrams & Manuals
2163 EPA (2000-04) Chain Saw View Diagrams & Manuals
2163 EPA (2001-10) Chain Saw View Diagrams & Manuals
2171 (2000-04) Chain Saw View Diagrams & Manuals
2171 (2001-10) Chain Saw View Diagrams & Manuals
2171 EPA (2000-04) Chain Saw View Diagrams & Manuals
2171 EPA (2001-10) Chain Saw View Diagrams & Manuals
CS2163 (2003-05) Chain Saw View Diagrams & Manuals
CS2163 (2005-05) Chain Saw View Diagrams & Manuals
CS2163 (2007-01) Chain Saw View Diagrams & Manuals
CS2163 EPA (2003-05) Chain Saw View Diagrams & Manuals
CS2163 EPA (2005-05) Chain Saw View Diagrams & Manuals
CS2163 EPA (2007-01) Chain Saw View Diagrams & Manuals
CS2171 (2003-05) Chain Saw View Diagrams & Manuals
CS2171 (2005-05) Chain Saw View Diagrams & Manuals
CS2171 (2007-01) Chain Saw View Diagrams & Manuals
CS2171 EPA (2003-05) Chain Saw View Diagrams & Manuals
CS2171 EPA (2005-05) Chain Saw View Diagrams & Manuals
CS2171 EPA (2007-01) Chain Saw View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
- Pruner Parts
This part replaces obsolete part #: 501452701
Customer Part Reviews ?
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- 1
just what I needed
fit perfectly and installation was much easier than the one submitted by a prior customer
Guest -
September 22, 2021
Verified Purchase
The part was easy to find it was easy order and it got here quick you guys did a great job
The part was easy to find....... it was easy to order it was a correct part everything was great you guys are good
Guest -
April 9, 2020
Verified Purchase
Easy replacement after mine vibrated out....I think.
replaced this keeper and the screw to tighten the chain.
Guest -
January 27, 2020
Verified Purchase
THis problem is fixed
The parts ordered were exactly what I needed they arrived when they were scheduled and my chainsaw is back in working condition. Thank you.
Guest -
November 14, 2019
Verified Purchase
the repair was easy
the part work great
Guest -
June 21, 2019
Verified Purchase
Husqvarna 51 bar tensioner parts
Right parts. Everything was fine only parts were a week late. However with Covid and holiday weekend it's all good.
Guest -
July 13, 2020
Verified Purchase
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t days ago
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Chain adjustment screw and plastic nut went missing.
Philip - April 14, 2016
👍 10 of 10 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, impact wrench
Parts Used
The actual replacement of the parts was pretty simple but had to remove the clutch assembly to get to it. After researching how to remove clutch on that model, which wasn't to simple, (I'm not a mechanic), everything else went smoothly. It takes an impact tool to remove the clutch. Had to put some rope in the spark plug hole to jam the cylinder to keep it from turning. Found a youtube video on removing that clutch which was very helpful.
It's important to note that the plastic or nylon nut must be threaded completely down to the head of the screw where there is a groove for it. Without that plastic nut, the screw could loosen up during use and fall out. Likely why mine went missing to start with.
The saw is an old model but runs good. Glad to be able to find parts for it to keep it going. New saws aren't cheap.
It's important to note that the plastic or nylon nut must be threaded completely down to the head of the screw where there is a groove for it. Without that plastic nut, the screw could loosen up during use and fall out. Likely why mine went missing to start with.
The saw is an old model but runs good. Glad to be able to find parts for it to keep it going. New saws aren't cheap.
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Saw chain was loose, screw broke, could not tighten chain.
Matthew - December 25, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
Parts Used
1. Remove the chain cover.
2. Remove the chain and the bar.
3. Remove the oiler cover plate.
4. Remove the old pawl.
5. Install the new pawl, the screw, and the nut.
6. Reassemble and adjust the chain tension.
2. Remove the chain and the bar.
3. Remove the oiler cover plate.
4. Remove the old pawl.
5. Install the new pawl, the screw, and the nut.
6. Reassemble and adjust the chain tension.
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Chain adjuster fell apart.
Richard - February 8, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Plastic nut was pushed onto the screw adjuster. Screw was then screwed into the bar pall.
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Chain tensioner on Husqvarna 55 chain saw.
John - September 15, 2023
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
Loosened chain bar, installed tensioner screw.
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The chain tensioner was not working
Donald - April 13, 2021
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Hex wrench
Parts Used
Removed clutch cover, charm and bar. Loosened hex nut on stainless steel tensioner cover. Clutch didn’t need to be removed. Removed old screw and pawl. Nut was already missing. Threaded new nut onto screw all the way to the head end where it fit into recess in the screw. Threaded pawl onto screw part way. Retightened hex screw. Bar chain and clutch cover reinstalled and back in business.
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Chain saw bar would not stay adjusted.
Gene - December 11, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Parts Used
1. Removed bar and chain.
2. Removed small oiler cover.
3. Installed new screw, nut, and pawl.
4. Replaced cover.
5. Replaced bar and chain.
2. Removed small oiler cover.
3. Installed new screw, nut, and pawl.
4. Replaced cover.
5. Replaced bar and chain.
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Lost screw that holds tension on chain saw bar, nut and flange nut.
Charles - May 11, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Tool provided with chain saw
1. Removed bar and chain
2. Removed protective plate covering where the adjustment screw was located
3. Installed new screw with new nut to hold the adjustment screw in place
4. Installed protective plate covering adjustment screw
5. Reinstalled chair bar and chain
6. Reinstalled cover with new flange nut that was lost also.
2. Removed protective plate covering where the adjustment screw was located
3. Installed new screw with new nut to hold the adjustment screw in place
4. Installed protective plate covering adjustment screw
5. Reinstalled chair bar and chain
6. Reinstalled cover with new flange nut that was lost also.
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Chain tensioner inoperable
Michael - May 2, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
1. Remove the sprocket drive cover
2. Remove the chain and bar
3. Clean the debris from the tensioner area
4. Place the nut in the end of the slot closest to engine
5. Thread screw through the slide pin (it will be tight to thread)
6. Slide screw and pin back toward engine and seat end of screw into nut
7. Replace bar, chain, and cover
8. Tension chain properly
9. Tighten cover
2. Remove the chain and bar
3. Clean the debris from the tensioner area
4. Place the nut in the end of the slot closest to engine
5. Thread screw through the slide pin (it will be tight to thread)
6. Slide screw and pin back toward engine and seat end of screw into nut
7. Replace bar, chain, and cover
8. Tension chain properly
9. Tighten cover
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chain adjustment screw came off
dempsey - April 20, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
screwed the new screw in with the provided nut
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the old pawl broke so i just replaced all parts that were involved
Scott - January 25, 2019
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Scrench
Parts Used
removed bar and chain cover, bar and chain and chain guard plate. replaced pawl, screw and nut, reinstalled chain guard plate bar, chain and bar and chain cover
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
