MS21299-6
Military Standard Flat Washer
size: 3/8", plain, cadmium plated steel, MS21299 series washer






MS21299-6 Datasheet Features and Specification
Quick Specs
Material | Steel |
Additional Information
SKU / Model: | MS212996 |
NSN: | 5310-01-025-6451 |
FSC: | Nuts and Washers / 5310 |
Product Series: | MS21299 |
Pack Weight (Approx.) | 0.499 lb |
Minimum Qty (MOQ): | 100 |
ECCN: | EAR99 |
National Motor Freight: | 194160, Washer Or Gaskets, Iron Or Steel, |
Download PDF Version MS21299-6_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS21299-6

MS21042-6
Self-Locking Extended Washer Nut
in Nuts
Thread: 3/8-24, 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
5310-01-617-7319 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 MS21299-6





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

Exceptional service as always. Part was as advertised, and came promptly, in perfect condition. I am always very pleased working with Military Fasteners.
As always, orders are shipped promptly and received when expected. Rarely can you find products at lower cost than at Military Fasteners. The web site is easy to use. My favorite place to order from. When looking for aviation products, I always go to Military Fasteners first.
Another good experience with Military Fasteners, and our Sales Rep, Dan Hunter. We needed hardware for an older aircraft model, and Dan's expertise was exceptional. He quickly identified fasteners, even for parts with unclear descriptions, and provided invaluable technical assistance. The supporting data was spot-on, verified by our technicians. Despite finding slightly lower prices elsewhere, the unmatched service and expertise from Military Fasteners, particularly Dan, make them our preferred choice. Our order was delivered ahead of schedule. Highly recommend MilFast for top-notch service and technical support!
Nice online shop, with very fast operation and high quality service. A bit expensive and without quantity discounts but worth the money in general.
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.