Medium
30-60 minutes
This is a genuine manufacturer-sourced part which is specially designed for use with Craftsman lawn tractors. The hex nut is used to secure the blade of the lawn tractor. A socket wrench will be required to remove the hex nut from the blade. This part is made of hardened steel and is sold individually.
Nut.56-18 Reg Unf Z-y 15X100MA
OEM part for: Murray
Part Number: 15X100MA
$3.99
In Stock
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Compatibility
This Nut.56-18 Reg Unf Z-y will fit the following 1665 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 1665 matching models.
Murray
Show More Compatible Models1665 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Craftsman
- Murray
- Snapper
This item works with the following types of products:
- Lawn Mower
- Lawn Tractor
This part replaces obsolete part #: 722382, 15X100ZMA, 15X100, MU15X100MA
Customer Part Reviews ?
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Fits good
It got the use it was for
Guest -
August 9, 2023
Verified Purchase
my obselete deck
got info if parts would fit my 2004 mower,he assured they would.I had to modify one with thin washer spacer but works great.
Guest -
June 24, 2020
Verified Purchase
Great experience from start to finish!
The replacement parts were easy to order. Thanks to the detailed diagram I was able to order the exact parts I needed. Parts arrived quickly & my mower was up & running in no time!
Guest -
May 13, 2020
Verified Purchase
Quality parts and great service
All parts ordered were recieved and of the best quality, it took a week to recieve all parts here in South Africa. An honest pleasure to spend money and get absolutely fantastic service. I will definitely use you guys again. Outstanding.
iGlobal -
July 6, 2019
Verified Purchase
parts easy to find on web site and delivered quickly
riding lawnmower replacement parts. repaired and cutting grass again. thanks
Guest -
May 7, 2019
Verified Purchase
Mower parts
Always had excellent customer SVC. Mower is fixed, like new. Thanks.
mary lynn -
April 25, 2019
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.
Both blade shafts were bent and bearings needed replacing.
Kent - June 14, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Pneumatic impact wrench
1. Removed the cutting deck from the mower.
2. Used an impact wrench to dis-assemble and remove the components.
3. Replaced the upper pulleys, the spindle shafts, the shaft housings (mandrills) and the cutting blades.
4. Reassembled the components.
5. Replaced the cutting deck.
2. Used an impact wrench to dis-assemble and remove the components.
3. Replaced the upper pulleys, the spindle shafts, the shaft housings (mandrills) and the cutting blades.
4. Reassembled the components.
5. Replaced the cutting deck.
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drive belt broke
kenneth - July 28, 2019
Tool Type
Lawn Tractor
Difficulty
Expert
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Wrench Set, welder, angel grinder,acet torch
Parts Used
replaced the drive belt once I got the right size.
then replaced the blades an the deck. had to cut the nuts off the shaft then order new nuts then buy a die to clean up the threads. then tighten everything up then heated one part of the deck up bend it back away from the blade. then welded the broken wheel bracket back on deck then made new pieces to fill in the holes caused by stones flying through the deck. filled the holes then put the deck back on after a little touch up paint. total time about 3 days.
then replaced the blades an the deck. had to cut the nuts off the shaft then order new nuts then buy a die to clean up the threads. then tighten everything up then heated one part of the deck up bend it back away from the blade. then welded the broken wheel bracket back on deck then made new pieces to fill in the holes caused by stones flying through the deck. filled the holes then put the deck back on after a little touch up paint. total time about 3 days.
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loose blade stripped threads on shaft
dennis - July 23, 2019
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
had to remove the mower deck to replace the shaft and reinstall deck
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Jack-shilf bearings & shaft wore out, the blades were bad, all new parts purchased fit great.
roy - August 18, 2018
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set, Breaker Bar for all Nuts / Screws
I used my 2 ton engine lift to raise the lawn tractor mower front end high enough to do the repair job easily. 3 of 5 screws attaching jack-shaft to housing broke. Could not remove the spacer from old main shaft to replace with new shaft. Hardware store for new screws, I had metal tubing on hand to make a new spacer. This old machine is working again.
Thanks, for having all the parts I needed.
Thanks, for having all the parts I needed.
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Bad mandrel housing, and broke bolt
Karl - September 8, 2017
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set, Adjustable Wrench
Lifted front end of mower and placed on 3 ft. 2x4
Removed mower blade retainer nut , washers and blade found had a broken blade adapter.
then found mandrel was bad.
Removed mandrel Bolts which one of them snapped off.
Removed mower deck pin so front of deck swung down
Removed Mandrel with pulley etc.
Removed pulley and put on New mandrel.
Put mandrel and pulley back into position raising the mower deck and putting pin back in place; had to fight with the belt a little bit. Put bolts in place, tightened them up for mandrel, put blade adapter on then Blade washer and nut and tightened that down and lowered front of lawn mower.
Removed mower blade retainer nut , washers and blade found had a broken blade adapter.
then found mandrel was bad.
Removed mandrel Bolts which one of them snapped off.
Removed mower deck pin so front of deck swung down
Removed Mandrel with pulley etc.
Removed pulley and put on New mandrel.
Put mandrel and pulley back into position raising the mower deck and putting pin back in place; had to fight with the belt a little bit. Put bolts in place, tightened them up for mandrel, put blade adapter on then Blade washer and nut and tightened that down and lowered front of lawn mower.
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Lawn tractor mower deck needed spindles replaced and new belts.
Michael - May 3, 2017
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Socket set, Wrench Set, Air rachet
1. Removed mower deck from tractor.
2. Removed belt guards from deck and removed belts.
3. Removed old blades.
4. Removed all necessary brackets and pulleys to access spindles.
5. Removed all three spindles.
6. Cleaned mower deck, bead blasted rust from deck, primered and painted deck.
7. Installed new parts in spindles and installed spindles in mower deck, lubed spindles with synthetic grease through grease zerts on spindles.
8. Reattached all brackets and installed new blades.
9. Reinstalled pulleys and new belts.
10. Reinstalled belt guards and reconnected mower deck to lawn tractor.
11. Adjusted and leveled mower deck to factory specs.
2. Removed belt guards from deck and removed belts.
3. Removed old blades.
4. Removed all necessary brackets and pulleys to access spindles.
5. Removed all three spindles.
6. Cleaned mower deck, bead blasted rust from deck, primered and painted deck.
7. Installed new parts in spindles and installed spindles in mower deck, lubed spindles with synthetic grease through grease zerts on spindles.
8. Reattached all brackets and installed new blades.
9. Reinstalled pulleys and new belts.
10. Reinstalled belt guards and reconnected mower deck to lawn tractor.
11. Adjusted and leveled mower deck to factory specs.
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Muffler burnt out, lost nut
MICHAEL - June 25, 2016
👍 0 of 1 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Removed the old muffler, installed new with no un needed heat shields and replaced missing blade nut.
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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.
