Easy
Less than 15 minutes
This is a Manufacturer Approved replacement nut for Lawn and Garden equipment. This item is Metal an is Sold Individually. A lock nut is a type of nut that resists loosening when properly threaded onto a bolt. The purpose of this Nut is to secure the Cutting Blade to the Mowers Spindle/Shaft.
You would need a Wrench to tighten or loosen this Hex Nut.
Hex Nut 90561895
OEM part for: DeWALT, Black and Decker
Part Number: 90561895
$4.99
In Stock
Order within the next 6 hours and your part ships today! 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 118 machines
Black and Decker
CMM1200 Type 1 24V Cordless Mulching Mower View Diagrams & Manuals
CMM1200 Type 2 24V Cordless Mulching Mower View Diagrams & Manuals
LM175 18" Electric Mower View Diagrams & Manuals
MM275 18" Electric Mulching Mower View Diagrams & Manuals
MM575 18" Electric LAWNHOG Mulching Mower View Diagrams & Manuals
MM675 Type 1 18" Electric "LAWNHOG&trade" Mulching Mower with Flip-Over Handle View Diagrams & Manuals
MM675 Type 2 18" Electric "LAWNHOG&trade" Mulching Mower with Flip-Over Handle View Diagrams & Manuals
MM875 Type 1 19" Electric LAWNHOG&trade Mulching Mower with Rear-Bag View Diagrams & Manuals
MM875 Type 2 19" Electric LAWNHOG&trade Mulching Mower with Rear-Bag View Diagrams & Manuals
37051 Type 1 19 Crafts Electric Mower View Diagrams & Manuals
37051 Type 2 19 Crafts Electric Mower View Diagrams & Manuals
37052 Type 1 19 Crafts Cordless Mower View Diagrams & Manuals
8000 Type 2 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 3 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 4 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 5 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 6 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 7 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 8 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type 9 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type A 18 Single Mower 115 Volt View Diagrams & Manuals
8000 Type AA 18 Single Mower 115 Volt View Diagrams & Manuals
8008 Type 1 Deluxe 18 Lawn Mower View Diagrams & Manuals
8008 Type 2 Deluxe 18 Lawn Mower View Diagrams & Manuals
8008 Type 3 Deluxe 18 Lawn Mower View Diagrams & Manuals
8008 Type 4 Deluxe 18 Lawn Mower View Diagrams & Manuals
8008 Type 5 Deluxe 18 Lawn Mower View Diagrams & Manuals
8008 Type 6 Deluxe 18 Lawn Mower View Diagrams & Manuals
8010 Type 2 18 Deluxe Mower 115 Volt View Diagrams & Manuals
8010 Type 3 18 Deluxe Mower 115 Volt View Diagrams & Manuals
8018 Type 1 18 Flipover Handle Mower View Diagrams & Manuals
8019 Type 1 18 Lawn Mower Flipover Handle View Diagrams & Manuals
8021 Type 10 18 Deluxe Mower / Catcher View Diagrams & Manuals
8021 Type 8 18 Deluxe Mower / Catcher View Diagrams & Manuals
CM500 Type 1 18 Cordless Mower View Diagrams & Manuals
CM500 Type 2 18 Cordless Mower View Diagrams & Manuals
CM500 Type 3 18 Cordless Mower View Diagrams & Manuals
CM600 Type 1 Cordless Mower View Diagrams & Manuals
CM600 Type 2 Cordless Mower View Diagrams & Manuals
CMM1000 Type 1 19 Mulching Mower View Diagrams & Manuals
CMM1000 Type 2 19 Mulching Mower View Diagrams & Manuals
CMM1000 Type 2A 19 Mulching Mower View Diagrams & Manuals
CMM1000 Type 3 19 Mulching Mower View Diagrams & Manuals
CMM1000 Type 4 19 Mulching Mower View Diagrams & Manuals
CMM1000 Type 5 19 Mulching Mower View Diagrams & Manuals
CMM625 Type 1 Cordless Mulch Mower View Diagrams & Manuals
CMM625 Type 2 Cordless Mulch Mower View Diagrams & Manuals
CMM625 Type 3 Cordless Mulch Mower View Diagrams & Manuals
CMM625 Type 4 Cordless Mulch Mower View Diagrams & Manuals
CMM630 Type 1 18 High Wheel Cordless Mower View Diagrams & Manuals
CMM630 Type 2 18 High Wheel Cordless Mower View Diagrams & Manuals
CMM650 Type 1 Cordless Mulch Mower View Diagrams & Manuals
CMM650 Type 2 Cordless Mulch Mower View Diagrams & Manuals
CMM750 Type 1 Cordless Mulch Mower View Diagrams & Manuals
CMM750 Type 2 Cordless Mulch Mower View Diagrams & Manuals
CMM750 Type 3 Cordless Mulch Mower View Diagrams & Manuals
LM100 Type 1 Steel Deck Mower View Diagrams & Manuals
LM100 Type 2 Steel Deck Mower View Diagrams & Manuals
LM100 Type 3 Steel Deck Mower View Diagrams & Manuals
LM1820 Type 1 18 Electric Lawn Mower View Diagrams & Manuals
LM1900 Type 1 Electric Mower View Diagrams & Manuals
LM400 Type 1 18 Electric Mower View Diagrams & Manuals
M100 Type 1 18 Inch Mower View Diagrams & Manuals
M100 Type 2 18 Inch Mower View Diagrams & Manuals
M200 Type 1 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 2 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 3 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 4 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 5 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 6 Flip Over Handle Mower View Diagrams & Manuals
M200 Type 7 Flip Over Handle Mower View Diagrams & Manuals
M300 Type 1 18 Deluxe Mower View Diagrams & Manuals
M300 Type 2 18 Deluxe Mower View Diagrams & Manuals
M400 Type 1 Electronic Mower View Diagrams & Manuals
M700 Type 1 Rear Bagging Mower View Diagrams & Manuals
M700 Type 2 Rear Bagging Mower View Diagrams & Manuals
MM450 Type 1 Mulch N Mow View Diagrams & Manuals
MM450 Type 2 Mulch N Mow View Diagrams & Manuals
MM525 Type 1 Corded Mulch Mower View Diagrams & Manuals
MM525 Type 2 Corded Mulch Mower View Diagrams & Manuals
MM525 Type 3 Corded Mulch Mower View Diagrams & Manuals
MM525 Type 4 Corded Mulch Mower View Diagrams & Manuals
MM550 Type 1 12 Amp Mulch Mower View Diagrams & Manuals
MM550 Type 3 12 Amp Mulch Mower View Diagrams & Manuals
MM550 Type 4 12 Amp Mulch Mower View Diagrams & Manuals
MM600S Type 2 18 Electric Mower View Diagrams & Manuals
MM600 Type 1 18 Inch 4 Horse Power Mulching Mower View Diagrams & Manuals
MM600 Type 2 18 Inch 4 Horse Power Mulching Mower View Diagrams & Manuals
MM850S Type 4 19 Electric Mower View Diagrams & Manuals
MM850 Type 1 19 Mulching Mower View Diagrams & Manuals
MM850 Type 2 19 Mulching Mower View Diagrams & Manuals
MM850 Type 3 19 Mulching Mower View Diagrams & Manuals
MM850 Type 4 19 Mulching Mower View Diagrams & Manuals
MM850 Type 5 19 Mulching Mower View Diagrams & Manuals
SPCM1936 36V 19 in. Mower View Diagrams & Manuals
MM1800 Type 1 18 Inch Mulching Mower View Diagrams & Manuals
CM1836 Type 1 36V 18in Mower View Diagrams & Manuals
CM1936 Type 1 36V 19in Mower View Diagrams & Manuals
CM1936 Type 2 36V 19in Mower View Diagrams & Manuals
CMM1200 Type 3 Lawn Mower View Diagrams & Manuals
M2371B Type 2 18 Inch Mower View Diagrams & Manuals
8015 Type 1 18Std Twin Bl Mower View Diagrams & Manuals
MM875 Type 3 19 Mulching Mower View Diagrams & Manuals
CM1936ZF2 Type 1 36V Mower View Diagrams & Manuals
CM1836 (Type 2) 18" Cordless Mulching Rear bag Mower View Diagrams & Manuals
M200-BDK (Type 1) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 2) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 3) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 4) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 5) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 6) Flip Over Handle Mo View Diagrams & Manuals
M200-BDK (Type 7) Flip Over Handle Mo View Diagrams & Manuals
B8018 (Type 1) 18inflip Hdl Mower View Diagrams & Manuals
CM1936Z (Type 1) 36v 19in Mower View Diagrams & Manuals
CMM1200 (Type 2A) 24v Lawn Mower Power Tool View Diagrams & Manuals
LM175 (Type 1) 18-Inch 6.5a Mower Power Tool View Diagrams & Manuals
MM275 (Type 1) 18 Elect.Mower Power Tool View Diagrams & Manuals
MM575 (Type 1) 18 Elect.Mower Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Lawn Mower Parts
This part replaces obsolete part #: 239487-00
Customer Part Reviews ?
Average Rating (out of 5):
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Hex Nut
Just fine!
Guest -
March 30, 2022
Verified Purchase
part fit perfectly
parts came in perfect condition; replacing these parts saved my buying a new mower. Thanks!!!
Michael -
August 16, 2021
Verified Purchase
Lawnmower blade repair
Fit was perfect and delivery was very quick.
Michael -
August 14, 2021
Verified Purchase
Parts fitted and worked perfectly!
Keep up the good work!
Guest -
May 8, 2021
Verified Purchase
Outstanding service and shipment.
I ordered several parts for my 10 year old walking mower.
They all arrived in about a week which was excellent. All were authentic Black & Decker parts and fit perfectly. My mower is like new again, given the exception of some scratches and paint loss.
Good job Ereplacementparts.
Thank you and keep up the good work.
Tareq -
December 8, 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.
Hit a stake in the ground and it shattered the above parts.
mary - June 11, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Took off ruined parts & replaced them with the new ones.
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The blade and fan needed to be replaced.
Daniel - April 12, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Last summer I took the blade off to sharpen. I didn't give enough attention on how the items on the blade/fan shaft went back together, which resulted with the blade not being secure, and untimely being out of balance, which damaged the fan. I decided to replace everything on the blade/fan shaft.
Starting closest to the mower, I replaced the Spacer, no problem there. Next was the Fan, once again, no problem. Followed by the Blade, and it tells you what side should face the ground written right on it. Now, this is the point where you need to pay attention. What is next is called an Insulator followed by another spacer. The insulator has ridges on each side of it, that will straddle the blade on one side, and the metal spacer on the other side. Each have a oval hole in the center and you need to make sure each is pushed far enough on to the shaft to fit snugly on the oval part of the shaft. The tricky part for me was to keep everything lined up and inside of the ridges, plus keeping everything pushed up on the shaft to expose the threads for the Hex Nut to get started. Once the Hex Nut is started, the only thing you need to do at that point is to make sure everything stays lined up as you tighten the Hex Nut. As you tighten Hex Nut, and the blade and insulator and the metal spacer become not aligned, loosen the Hex Nut enough to get everything back in line and start tightening again. Hope this helps.
Starting closest to the mower, I replaced the Spacer, no problem there. Next was the Fan, once again, no problem. Followed by the Blade, and it tells you what side should face the ground written right on it. Now, this is the point where you need to pay attention. What is next is called an Insulator followed by another spacer. The insulator has ridges on each side of it, that will straddle the blade on one side, and the metal spacer on the other side. Each have a oval hole in the center and you need to make sure each is pushed far enough on to the shaft to fit snugly on the oval part of the shaft. The tricky part for me was to keep everything lined up and inside of the ridges, plus keeping everything pushed up on the shaft to expose the threads for the Hex Nut to get started. Once the Hex Nut is started, the only thing you need to do at that point is to make sure everything stays lined up as you tighten the Hex Nut. As you tighten Hex Nut, and the blade and insulator and the metal spacer become not aligned, loosen the Hex Nut enough to get everything back in line and start tightening again. Hope this helps.
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Needed a new hex nut, spacer, and blade insulator.
Jay - June 1, 2020
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
Watched YouTube and followed the example. Worked perfectly. So glad ReplacementParts had exactly what I needed...for a five year old mower, no less!
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Fan and spacer were damaged, and the blade was not engaged with the drive mechanism. It was just spinning freely.
Kenneth - June 1, 2018
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Removed the fan, spacers and blade and associated components on the shaft, and replaced them all in the reverse sequence from which they were removed. Only needed one wrench to do the job.
Side note: I was ready to throw the mower away during the annual citywide curbside pickup day, until I took one last look. All 6 parts I needed to replace were easily found on eReplacementParts.
This mower should be good for another 15 years!
Very pleased!
Side note: I was ready to throw the mower away during the annual citywide curbside pickup day, until I took one last look. All 6 parts I needed to replace were easily found on eReplacementParts.
This mower should be good for another 15 years!
Very pleased!
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Needed new blade
Russell - May 7, 2018
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
1. Turned mower up side down.
2. Removed existing hex nut and removed old blade.
3. Lost hex nut.
4. Order new blade and hex nut.
5. Received parts BEFORE promised delivery date!
6. Installed new blade and secured with new hex nut.
7. Mowed the lawn.
2. Removed existing hex nut and removed old blade.
3. Lost hex nut.
4. Order new blade and hex nut.
5. Received parts BEFORE promised delivery date!
6. Installed new blade and secured with new hex nut.
7. Mowed the lawn.
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Old lawnmower blade, and broken fan
James - April 12, 2018
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Adjustable Wrench
Removed bolt holding blade and removed: blade, fan and blade spacer.
Installed new blade spacer, fan, blade, and hex nut.
Done! Super easy, and the parts were perfect. Should have done this years ago.
Installed new blade spacer, fan, blade, and hex nut.
Done! Super easy, and the parts were perfect. Should have done this years ago.
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Elec fan blade broken, & missing parts
John - April 12, 2018
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
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Missing nut and spacer
Christine - November 9, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Adjustable Wrench
Installed the new blade, then the insulator, then the spacer, then tightened the nut on the spindle
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The nut was lost.
Steve - November 3, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
Screwed the nut on.
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Blade bent.
Raymond - June 23, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Adjustable Wrench
Removed and replace all parts of the blade shaft.
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Load More Install Stories
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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.
