Easy
15-30 minutes
This is a genuine OEM sourced replacement part for Lawn and Garden equipment. A lock nut is a type of nut that resists loosening when properly threaded onto a bolt. It will have different applications based on your equipment. Please refer to diagrams for proper use. This item is metal an is sold individually.
You would need a wrench to tighten/loosen this nut.
Nut, Cntr Lck, 3/8-16 703893
OEM part for: Murray, Craftsman, Snapper, Simplicity
Part Number: 703893
$7.19
In Stock
Ships within 1 business day 
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Product Description ?
- 3/8-16
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Nut, Cntr Lck, 3/8-16 will fit the following 6171 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Murray
Craftsman
Snapper
Simplicity
Show More Compatible ModelsThis item works with the following types of products:
- Lawn Tractor Parts
- Lawn Mower Parts
- Trimmer Parts
- Grass Trimmer Parts
- Snowblower Parts
- Engine Parts
- Chipper / Shredder Parts
- Vacuum Parts
This part replaces obsolete part #: 1922694SM, 720142, 1930645, 1930651, 720148, 015X98MA, 1930645SM, 015X84MA, 15X84MA, 92682, 711622MA, 015X98, 015X84, MU015X84MA, MU015X98MA, 710140
Customer Part Reviews ?
Average Rating (out of 5):
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Just what was needed
The part fit, worked like it was supposed to and my mower now has good wheels that don’t wobble and make the cut uneven.
Guest -
May 16, 2023
Verified Purchase
20+ yr old Murray Widebody
Great source for OEM parts!
David -
March 21, 2020
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.
Pulley for blade drive siezed up
Lee - September 9, 2021
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Wrench Set, copper coat
replaced worn and defective parts
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replaced deck wheels
Ernest - August 12, 2020
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
Just took off old ones and put the new ones on. Simple
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Nothing ! - got the parts for my winter overhaul yet to be done
Kelvyn - April 21, 2018
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Adjustable Wrench
Great service from you guys, really appreciated it - my old (1991) model Murray mower is still running fine, (one his third mower deck and probably 10th set of blades!)
I needed a left hand headlight lens (part 91319) but so far haven't found one - got the right hand lens and all the other parts aok, so looking forward to the winter overhaul in the shed - if anyone has any idea where I can get the lens I need, new or second hand, would be great to hear !
Cheers
Kelvyn
I needed a left hand headlight lens (part 91319) but so far haven't found one - got the right hand lens and all the other parts aok, so looking forward to the winter overhaul in the shed - if anyone has any idea where I can get the lens I need, new or second hand, would be great to hear !
Cheers
Kelvyn
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A froze up nut on a bolt, and various missing screws.
Barry - October 22, 2017
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set
Just attached the screws and bolts.
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Idler pulley broke
Kenneth - July 24, 2017
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
Removed the deck from the mower
Removed the nut from the top of the pulley
Removed the broken pulley
Removed and replaced the spacer
Installed the new pulley
Tightened the new nut
Installed the deck on the mower
Removed the nut from the top of the pulley
Removed the broken pulley
Removed and replaced the spacer
Installed the new pulley
Tightened the new nut
Installed the deck on the mower
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Worn.
Laurie - July 22, 2017
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Removed the old pulley, replaced the belt and the nut. Mower works better now! This was super easy and really made a difference in how well it was mowing.
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Lawn tractor wouldn't steer
James - July 9, 2016
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Socket set, Wrench Set
Parts Used
First I used my garage jack to lift the front of the tractor 23 inches off the ground. I would have used jack stands as well, but found when I did that there was no room for me beneath the tractor. The most obvious reason for the tractor not turning to the left was the triangular shaped gear's teeth on that side being so blunted that the pinion gear could not engage them. Fortunately, I had a gear from a previous tractor. To remove and replace the shoulder bolts on the steering plate I had to hold the top of the bolt with a half inch wrench with one hand while removing the center lock nut on the bottom with a 9/16 socket. The center bolt was a bit more tricky as the nut was further back, but I managed. Once I had the new gear bolted in place, I thought that I was finished. That is when i found that the reason that the gear teeth were blunted was because the steering column had worn the base steering plate from 3/4 inch to 1 1/2 inches! so my next job was to remove the steering wheel and the holding pin on the top. Since I ruined the holding pin on removal, I drilled a hole through the steering column and attached the steering wheel to the column with a bolt. Since I also had a spare base steering plate, I removed the old one and installed that after putting a 'touch' of grease inside. Note: I buy old Murray lawn tractors for their 42 inch mowing decks as they are no longer available for purchase. I often strip parts from them that I might use. I had to purchase the shoulder bolt and its nut from replacement.com because the 'wear' items are never any good. My total time for the repair was around seven hours, but the tractor steers like new. It is a 1999 Murray Widebody GT with a standard transmission and a 17.5 horsepower Briggs and Stratton replacement engine from surplus center.com that is much more powerful than the original 17.5 HP Tecumseh was. I prefer standard transmissions because they do not wear out. I buy my belts and blades from Sunbelt.com, (I think...it's a division of John Deere), because the belts are Kevlar.
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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.
