MS21921-8D
Military Standard Tube Coupling Nut
tube outside diameter: 1/2", aluminum alloy, sleeve coupling flareless






MS21921-8D Datasheet Features and Specification
Quick Specs
Thread Size | 3/4 |
Thread Qty | 16 |
Thread Series | UNJF |
Thread Class | 3B |
Material | Aluminum |
Additional Information
Alternate Part Numbers
SKU / Model: | MS219218D |
NSN: | 4730-01-087-7557 |
FSC: | Hose, Pipe, Tube, Lubrication, and Railing Fittings / 4730 |
Product Series: | MS21921 |
Pack Weight (Approx.) | 0.128 lb |
Minimum Qty (MOQ): | 5 |
ECCN: | EAR99 |
National Motor Freight: | 013540, Alum Nuts |
Download PDF Version MS21921-8D_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS21921-8D

MS21922-8
Clinch Tube Fitting Sleeve
in Fittings
tube outside diameter: 1/2", coupling, flareless, carbon steel, MS21922 series sleeve
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 MS21921-8D





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

Excellent variety, quality, and service. And, small orders are no problem. Military Fasteners is a tinker's delight and a great resource. I also appreciate their using the USPS. So many companies ship UPS only and to Alaska the UPS price is ridiculous. Thank you.
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!
Great Service, very satisfied with ordering form your company. I have ordered several items and nothing has been incorrect or delayed. Large inventory to choose from, website design is very good and easy to navigate Keep up the good work
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!
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.