MS21299-4
Military Standard Flat Washer
Hole Diameter: 1/4", Diameter: 31/64", Thickness: 1/16", MS21299 series washer




MS21299-4 Datasheet Features and Specification
Quick Specs
Material | Steel |
Additional Information
SKU / Model: | MS212994 |
NSN: | 5310-01-121-8521 |
FSC: | Nuts and Washers / 5310 |
Product Series: | MS21299 |
Pack Weight (Approx.) | 0.000 lb |
Minimum Qty (MOQ): | 50 |
ECCN: | EAR99 |
National Motor Freight: | 194160, Washer Or Gaskets, Iron Or Steel, |
Download PDF Version MS21299-4_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS21299-4

MS21042-4
Self-Locking Extended Washer Nut
in Nuts
thread: 1/4-28, self locking. reduced hexagon, reduced height, cad-plated steel, no dry film lube, MS21042 series nut
More MS21299 flat washers
MS21299C8K, 5310-01-483-3941
MS21299C8 Hole Diameter: 1/2 inch
Hole Diameter: 1/2 inch, 5310-01-119-6796
5310-01-617-7319 Flat Washer
Hole Diameter: 3/8in., 5310-01-101-1856
Steel recessed washer hole diameter 1/4 inch, 5310-01-483-0360
Product Image Gallery
Product code MS21299-4



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

Everything I ordered was delivered quickly, packaged well. In fact, all of my prior orders as well.
In this day and age, it is rare to be impressed by customer service however, Military Fasteners has far exceeded my expectations. They went above and beyond to help ensure an important package delivery on time, and they made a little boys Christmas sweeter in the process. Thank you to the team there for your wonderful help. I will certainly come back to shop again and again. They always say, fly people are the best people.
I've never received an incorrect order from ACS, even when dealing with small hardware such as nuts, washers, screws, etc. Shipment is always fast and with reasonable shipment prices for my needs. Even my smallest of orders is processed and ship quickly. I'm a long-time ACS customer and I expect I will be for a long time.
Military Fasteners is an exceptional company in terms of how they run their business. Very prompt and responsive to questions, concerns, quotes, and all other forms of inquiry. Brittany Cornish supports many of the business transactions we perform with Military Fasteners and has made working with them an absolute pleasure. I would highly recommend them to anyone seeking mil-spec hardware.
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.