Easy
Less than 15 minutes
Square Key- 3/16 21553MA
OEM part for: Murray
Part Number: 21553MA
$5.18
Usually ships in 7 - 12 business days
Leaves our warehouse within 7 - 12 business days
Compatibility
This Square Key- 3/16 will fit the following 1312 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 1312 matching models.
Murray
Show More Compatible Models1312 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Murray
- Simplicity
- Snapper
This item works with the following types of products:
- Lawn Mower
- Lawn Tractor
This part replaces obsolete part #: 720258, 1717749SM, 021553MA, 037X63A, 21553, MU021553MA
Questions & Answers ?
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Does this fit my product?Questions & Answers for Square Key- 3/16
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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.
Missing square key on the left back axle/wheel (that enables the tractor to drive).
Greg - June 12, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
15-30 minutes
Tools Used
Pliers
Parts Used
I recently bought a used Murray Lawn tractor that had a missing square key for the back wheel/axle. I ordered it here with no problems and couldn't be happier. The part was shipped the same day and I was back up running/cutting in no time. With the model specified diagrams, it made it easy to find and order the part. Great job guys/gals!! Keep up the good work. Greg H.
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Transmission key broke on the tire
MARDO - April 19, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Parts Used
Remove the nut from the axle
Remove the wheel
Place the key in the key slot
Replace the wheel
Replace the washers
Tighten the nut
Remove the wheel
Place the key in the key slot
Replace the wheel
Replace the washers
Tighten the nut
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Lost part when I took off the wheel
Robert - September 1, 2022
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Put the piece in the groove, put on the washer and pin . No instructions needed.
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Missing hardware.
Chris - June 19, 2017
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers
Replaced the missing parts with the new ones.
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Key way lost when patching flat tire
Nathan - August 25, 2018
👍 0 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Wrench Set, Small jack
Parts Used
Jack up mower. Removed tire. place key in grove. Put tire back on.
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OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Learn MoreOur 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.
