Great Product 
Kendall F
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
June 20, 2025
 
As advertised 
Gail L
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
March 11, 2025
 
Ease of order 
Merle B
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
February 13, 2024
 
Ease of order 
Merle B
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
February 13, 2024
 
Top quality elastic stop nuts - in my case - for automotive purposes.  Aircraft Spruce is highly recommended by  race car builders for selling quality products that are used in a similar fashion to aircraft repair or construction. A+
William F
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8 (Pack Of 10)
December 19, 2023
 
August L
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
October 5, 2023
 
Quality nuts!
Just like me.   
Wesley M
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
July 30, 2023
 
Aviation R
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
June 14, 2023
 
Magaero L
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8 (Pack Of 10)
April 20, 2023
 
Magaero L
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8 (Pack Of 10)
April 20, 2023
 
Excellent quality stop nut that I use in many applications requiring a high strength nut that will not vibrate loose. 
Robert S
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
February 18, 2023
 
There are no locks who could screw that up
Russell B
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8
July 1, 2022
 
5 star
Jozef B
 Verified Purchase
Verified Purchase
Nut, Elastic Stop MS21044N8 (Pack Of 10)
November 26, 2021
 
I intend to use these in a Live Steam hobby project.
I intend to use them to join one inch high Steel rail sections together.
William S
April 20, 2021
 
Always a pleasure to see the folks in West Chicago.  They are so helpful and greet everyone with a smile.  Thank you for coming to the Midwest.  I look forward to the time when you start carrying wood, as I am restoring a 1942 Stinson L-5 Sentinel and a 1945 Percival Proctor - both ground up restorations.  Thanks for your assistance.  
Bob C
February 18, 2021
 
They lock! True AN hardware to Mil Spec.
Jose G
February 5, 2021
 
Exact size ordered, work perfectly.
Robert M
February 4, 2021
 
These things are the way to go for very secure connections
Art B
January 27, 2021
 
I write reviews as a hobby. However, its kind of hard to attach a  Product Review to a lock-nut. Nevertheless, AircraftSpruce requested my assessment. These appear to be very well-made. While I do not know the country origin of manufacture, Im hoping these are NOT made in China. I think it would be in the best interest of AircraftSpruce to list  Made in America whenever it applies. On the admin side, AircraftSpruce efficiently managed my multiple orders. The real test will come over time, both functionally and weather or not  AircraftSpruce  carpet-bombs me with ads.
Daniel O
January 18, 2021
 
Excellent quality.
David M
December 12, 2020
 
Everything arrived ahead of time and in good shape
John D
November 30, 2020
 
Arrived undamaged
Bart 
November 23, 2020
 
fast shipping to germany
thanks a lot
Robert R
September 14, 2020
 
Good service. Thank you.
Thomas G
September 11, 2020
 
they came as quickly as possible and it was the correct parts
Greg R
August 17, 2020
 
Exactly what I ordered.
George P
August 10, 2020
 
just what I needed
Louis E
July 27, 2020
 
Performed as expected 
David J
May 10, 2020
 
Good quality product 
Ramon B
April 30, 2020
 
Than you  people  very  happy with  my parts good quality product. 
Ramon B
April 23, 2020
 
Good quality product and service  fast  delivery service happy with  all  my products than you  very much.  Be safe 
Ramon B
April 17, 2020
 
Got it fast and well packaged
Gregg G
April 2, 2020
 
It threaded on, it locked in place.  We have a winner!
David J
March 28, 2020
 
Good parts.
David F
March 23, 2020
 
These nuts are the nuts.
Joseph D
March 19, 2020
 
The AN nuts are priced very good and the shipping options are awesome.   I love buying from Aircraft Spruce because of the great products, fast and affordable shipping, and ease of buying small quantities if needed. 
David P
February 27, 2020
 
I love my nuts!!  They worked great!!
Gateway A
November 23, 2019
 
order went very smoothly
Parker M
October 26, 2019
 
As advertised and very quick shipping like it always is from Aircraft Spruce.
Sherwood
Sherwood B
October 21, 2019
 
      Good stop nut, but not for engine side of the firewall.
Billy B
March 5, 2019
 
How do you review a bolt?  I trust Aircraft Spruce to do their due diligence sourcing their hardware so as not to be selling counterfeit parts.  
Don O
February 9, 2019
 
      Parts I ordered and previous parts arrived and were exactly what I ordered and function perfectly- I needed a new Vacuum pump for my Cessna150 and is working perfectly. Thx
Dennis M
December 20, 2018
 
    Great , exactly what I wanted and shipped the way I asked  
William C
July 17, 2018
 
Best nuts ever. 
Eaa C
April 30, 2018
 
      just as described
Gwen 
March 15, 2018
 
      
Charles C
February 4, 2018
 
I always count on Aircraft Spruce!
Billl 
January 8, 2018
 
its a nut..... it works for me
Dave M
September 6, 2017
 
good prize
Anatoly Z
March 20, 2013
 
Happy with the product but shipping And handling seems too expensive
Mike 
August 24, 2020
 
Elastic (keeper) nuts are just right. Minor problem — I ordered 8, received 7. Good thing I was only using 4, the other 4 were for backup. 
Steve 
June 19, 2020
 
 It is hard to get excited over stop nuts but they appear to come in bags of 25.  This is not mentioned as best I can see.
I think this should be stated as when making an order up for stock, whether is is 20, 25 or 30 does not matter much.
I much appreciate that one can purchase the nuts one at a time, but knowing that they can come in bags of 25 each has merit.  
Bruce B
June 29, 2018