Medium
30-60 minutes
This high-quality item is an authentic OEM hardware that is designed for use with Craftsman riding lawn mowers and garden tractors. It is one of the locknuts that is utilized to secure the pulleys. A locknut is a nut that resists loosening under vibration and torque. Refer to the diagrams of your model for the exact location and the correct application of this part. One durable metal locknut is included. You will need a wrench to secure and remove it.
Flange Top Lock Nut 596134801
OEM part for: Husqvarna, Ryobi
Part Number: 596134801
$3.99
In Stock
Ships within 1 business day 
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Compatibility
This Flange Top Lock Nut will fit the following 3468 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Lawn Tractor Parts
- Lawn Mower Parts
This part replaces obsolete part #: 178342, 5321783-42, 5391075-90, 532178342, 539400234, 5324002-34, 400234, 532400234, 539107590
Customer Part Reviews ?
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Exact fit
They always have had what I needed, be it something major or just a nut or bolt. Saves time having to go to hardware store looking for small items.
Guest -
October 4, 2021
Verified Purchase
Looks good
Fits perfectly
Guest -
June 22, 2021
Verified Purchase
Easy web site to us and parts came quickly, I was pleasantly surprised. 👍👍👍
Work perfectly.
Guest -
May 26, 2020
Verified Purchase
Parts ordered
Received all the parts needed in a timely manner, Great service and follow thru on the order
Guest -
August 20, 2019
Verified Purchase
Quick delivery
Excellent condition
Keith -
July 15, 2019
Verified Purchase
Easy repajIr
Good condition
Guest -
July 2, 2019
Verified Purchase
Worked as advertised
Shipping slowed by USPS.
Douglas -
August 19, 2020
Verified Purchase
Legit
Worked
Dennis -
March 22, 2020
Verified Purchase
was an easy repair, parts were correct
parts worked as expected delivery should not have taken 10 days it should have taken 1 week or less.
Mark -
August 5, 2019
Verified Purchase
Mower deck parts
Wrong part, I ordered a 5" pulley and you sent a 3" party
Guest -
July 23, 2019
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
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We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Flange Top Lock Nut
Need to know what size socket to purchase because this flange nut is larger than what i currently have in my socket set. Thanks
DJ
for model number Husqvarna Z5426
asked on 2023-12-09
Hello DJ, Thank you for your inquiry. We show that this is a 9/16 inch nut. We hope this helps.
eReplacementParts Team December 09, 2023
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.
Lawn mower spindle was rounded off where the blade attaches. I had to order a complete spindle as well as the flange nut.
Jim - May 27, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
Removed the old flange nut by cutting it off with a reciprocating saw because the old spindle was rounded off where the blade attaches and I was unable to hold the spindle still while removing the flange nut. After I loosened the belt tension removal and replacement of the flange nut and spindle was very easy.
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Mower deck cracked where mandrel bolts down
Raymond - July 24, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Power Drill, Socket set
1) I removed the mower deck from the tractor had to unhook the clips and the lowering cable
2) I removed the upper pulley (used an impact and it came off easy)
3) I removed the blade(also used my impact wrench
4) Removed the mandrel
5) Ihad to weld repair the mower deck where it had split ( this is why the mandrel broke one of the hold down bolts off)
6) I reinforced the bolt pattern with thick fender washers at the correct bolt pattern for the new mandrel and welded the washers in place
7) Ground off the welded areas to make them flush so the mandrel would not be in a bind when bolted back down
8) Repainted the deck before I installed all the new parts I ordered
9) Reinstalled the mower deck and adjusted the height to be level with the ground
10) Checked to make sure it worked correctly and went out and mowed the grass
11) All the parts were a perfect match to the ones I replaced and everything works as it should.
I work with my hands all the time and repair a lot of machines where I work. To me it was an easy fix prolly because of my experience. Your average homeowner might have a hard time fixing a mower deck if he or she doesn't have access to a welder which I needed in my situation. If there repair only requires a mandrel replacement because of a bad bearing it should be no problem for your average person to unbolt the broken pieces and replace them. Good luck and don't be afraid to get your hands dirty!
2) I removed the upper pulley (used an impact and it came off easy)
3) I removed the blade(also used my impact wrench
4) Removed the mandrel
5) Ihad to weld repair the mower deck where it had split ( this is why the mandrel broke one of the hold down bolts off)
6) I reinforced the bolt pattern with thick fender washers at the correct bolt pattern for the new mandrel and welded the washers in place
7) Ground off the welded areas to make them flush so the mandrel would not be in a bind when bolted back down
8) Repainted the deck before I installed all the new parts I ordered
9) Reinstalled the mower deck and adjusted the height to be level with the ground
10) Checked to make sure it worked correctly and went out and mowed the grass
11) All the parts were a perfect match to the ones I replaced and everything works as it should.
I work with my hands all the time and repair a lot of machines where I work. To me it was an easy fix prolly because of my experience. Your average homeowner might have a hard time fixing a mower deck if he or she doesn't have access to a welder which I needed in my situation. If there repair only requires a mandrel replacement because of a bad bearing it should be no problem for your average person to unbolt the broken pieces and replace them. Good luck and don't be afraid to get your hands dirty!
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Bearings in Mandrel worn out
Paul - August 28, 2023
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Released tension on belt.
Removed belt.
Removed flange nut
Removed blade
Removed 4 bolts on mandrel.
Removed pulley.
Replaced pulley
Replaced mandrel.
Replaced blade.
Replaced belt
Reapplied tension on belt.
Removed belt.
Removed flange nut
Removed blade
Removed 4 bolts on mandrel.
Removed pulley.
Replaced pulley
Replaced mandrel.
Replaced blade.
Replaced belt
Reapplied tension on belt.
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pulley sheared on mandrel shaft
Dan - June 22, 2021
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Socket set, Wrench Set, grinder
Ordered wrong parts. Am reordering in the morning.
Job made easier with mandrel assebly.
Job made easier with mandrel assebly.
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spindle shifted and bent blade
Keith - September 2, 2020
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Pliers, Power Drill, Socket set, Wrench Set, Grinder with cutoff wheel
had to cutoff both spindles to remove as a pair. Changed everything , mandrels pulleys and hardware. Now she runs like a new mower. The reason I had to cutoff mandrels is pulleys on top of mandrels were seized on.
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Non-greasable bearings on idler pulley failed.
Russell - August 13, 2020
Tool Type
Lawn Mower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, hammer
Took off failed part. replaced it with new part.
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Spindle bearing disintegrated
Walt - June 18, 2020
Tool Type
Lawn Tractor
Difficulty
Medium
Time
1-2 hours
Tools Used
, Impact Driver
Remove deck
Remove drive belt.
Remove spindle
Install new spindle assembly
Note: Spindle nut is NOT reusable.
Remove drive belt.
Remove spindle
Install new spindle assembly
Note: Spindle nut is NOT reusable.
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Bad bearings and worn out pulley.
CARLTON - May 21, 2020
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
Take of blade. Remove nut on pulley. Take all four bolts off housing on top of deck. Screw in new bolts in new housing to make new threads. Install new housing. Secure all bolts. Install new pulley and blade and it’s done.
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I hit a rock with the mower and the mandrels broke
Philip - October 27, 2019
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set, Nutdriver, Adjustable Wrench, Air tools to remove blades and nut
I Removed the mower deck
Then I removed the bolts that hold the mandrel to the mower deck
Then I removed the blades from the mandrel
Then I removed the bolts that hold the mandrel to the mower deck
Then I removed the blades from the mandrel
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mandrel broke
GARY - August 31, 2019
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set, impact wrench
replaced broken parts
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
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.
