MS51971-1
Military Standard Plain Hexagon Nut
Thread: 1/4-20, Height: 1/4", Head Width: 3/8, MS51971 series nut



MS51971-1 Datasheet Features and Specification
Quick Specs
Thread Size | 1/4 |
Thread Qty | 20 |
Thread Series | UNC |
Thread Class | 2B |
Material | Steel |
Additional Information
SKU / Model: | MS519711 |
NSN: | 5310-00-903-5966 |
FSC: | Nuts and Washers / 5310 |
Product Series: | MS51971 |
Pack Weight (Approx.) | 0.000 lb |
Minimum Qty (MOQ): | 25 |
Schedule B: | 7318.16.0085 |
ECCN: | EAR99 |
National Motor Freight: | 093486, Bolts,nuts Or Screws, Noi (sub 3) |
Download PDF Version MS51971-1_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS51971-1

MS35338-139
Lock Washer
in Washers
fits diameter: 1/4", corrosion resistant, stainless steel, MS35338 series washer

MS35338-138
Lock Washer
in Washers
Size: #10, split lock, corrosion resistant steel, MS35338 series washer

AN960C10
Flat Washer
in Washers
Size: #10, thickness: 1/16, corrosion resistant steel, passivated finish, AN960 series washer

MS35650-304
Plain Hexagon Nut
in Nuts
Thread: 10-32, hex nut, fine thread, corrosion resistant steel, MS35650 series nut
More MS51971 plain hexagon nuts
UNC 3/4-10 thread, 1 1/8" width, 41/64" width, 18-8 stainless steel hexagon nut
$9.00 EA, UNC 5/8-11 thread, Height: 1/2in., Head Width: 7/8in.
UNC 1/2-13 thread, 3/4" width, 7/16" height
$7.14 Ea
Thread Size: 3/8in., Nut Height: 1/4in., Head Width: 5/8in.
Thread Size: 1/4in., Nut Height: 1/4in., Head Width: 1/2in.
Product Image Gallery
Product code MS51971-1


Have a question
If you require a quote on this or any product please visit our quote request page »
Browse our frequently asked questions page.
You may contact us by phone at +1 (904) 543-6395 or
email us using our contact form.
Our hours of operation are 8:00am - 6:00pm EST
Customer Reviews

Website didn't show my exact item needed, but their quoting dept got me over a quote ASAP. VIVIAN MANGOLD followed up to make sure I was all set Indeed, I was! Great customer service. Highly recommend.
Had an order discrepancy. Kristen Belmont to the rescue! Very well taken care of. Thanks to Military Fasteners for having a wonderful C.A.R.E team!
I recently had the pleasure of working with Dan Hunter and I must say that my experience was nothing short of exceptional. Dan is the epitome of professionalism and knowledge in the Aerospace industry. From the moment I engaged with Dan, I was impressed by his deep understanding of the products/services he was selling. His expertise was evident as he patiently and thoroughly answered all of my questions, providing me with valuable insights that helped me make informed decisions. What sets Dan apart is his ability to build trust and establish rapport with customers effortlessly. I never felt pressured or rushed into making a purchase; instead, I felt supported and guided in finding the right solution for my needs. Ask for Dan if you are looking for a salesperson who goes above and beyond to deliver an exceptional customer experience.
I routinely use Military Fasteners and have them on our Approved Vendor List. They already understand traceability requirements and their website always seems up to date and accurate. Same day shipping is a big deal for us as well."
Please complete this form if you're having an issue with ordering this item or this item displays invalid or innacurate information or specifications. We thank you for taking the time to report issues so that we may better serve you.