MS21921-6W
Military Standard Tube Coupling Nut
Outside diameter: 3/8", aluminum alloy, sleeve coupling flareless, MS21921 series nut




MS21921-6W Datasheet Features and Specification
Quick Specs
Thread Size | 1/2 |
Thread Series | UNF |
Thread Class | 3B |
Material | Aluminum |
Additional Information
SKU / Model: | MS219216W |
NSN: | 4730-00-554-7397 |
FSC: | Hose, Pipe, Tube, Lubrication, and Railing Fittings / 4730 |
Product Series: | MS21921 |
Pack Weight (Approx.) | 0.085 lb |
Minimum Qty (MOQ): | 5 |
ECCN: | EAR99 |
National Motor Freight: | 013540, Alum Nuts |
Download PDF Version MS21921-6W_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS21921-6W

MS21922-6
Clinch Tube Fitting Sleeve
in Fittings
tube outside diameter: 3/8", sleeve coupling flareless, Carbon steel, MS21922 series fitting
More MS21921 tube coupling nuts
Corrosion resistant steel (15-5ph), cadmium plated, tube outside 1/2in., nut, sleeve coupling flareless
tube outside 5/16", nut, sleeve coupling flareless - corrosion resistant steel - cadmium plated "
Carbon steel tube outside 1/4in., nut, sleeve coupling flareless
$83.94 Each, Corrosion resistant steel cadmium plated, tube outside 5/8in., nut, sleeve coupling flareless
$15.30 Each, Aluminum alloy 7075, tube outer diameter 1/2in., nut, sleeve coupling, flareless
4730-00-777-7248 Tube Coupling Nut
Product Image Gallery
Product code MS21921-6W



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

Tanks for the fantastic service. I ordered over the new year period and was amazed my shipment arrived so fast, all the way to New Zealand. Less than a week and that included clearing Customs. Awesome!!
Amazingly prompt response! I ordered over 1000 items and couldn't believe it when there was an email waiting the following morning saying the items had been dispatched. Easy to track the package online. By comparison I ordered some items from another supplier 3 months ago and I'm still waiting, with no apologies or communication emanating from them to explain the delay.
I can say that Military Fasteners was able to deliver the part to me very quickly. I live in a very remote area in the Tennessee mountains and typically have to wait up to two weeks to receive deliveries. Sometimes, the delivery guys cannot find my house at all, and they have to leave my packages at the local general store. But with Military Fasteners, my packages always find my front door step and in great condition. This package arrived nearly a week earlier than expected, and that was over the New Years holiday! Great work, Military Fasteners, on your delivery service. Thanks!
The customer service from Trisha Hawkins at Military Fasteners was exceptional.
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.