MS21921-4D
Military Standard Tube Coupling Nut
tube outer diameter: 1/4", sleeve coupling, flareless, aluminum alloy






MS21921-4D Datasheet Features and Specification
Quick Specs
Thread Size | 7/16 |
Thread Qty | 20 |
Thread Series | UNJF |
Thread Class | 3B |
Material | Aluminum |
Additional Information
SKU / Model: | MS219214D |
NSN: | 4730-00-555-8203 |
FSC: | Hose, Pipe, Tube, Lubrication, and Railing Fittings / 4730 |
Product Series: | MS21921 |
Pack Weight (Approx.) | 0.118 lb |
Minimum Qty (MOQ): | 10 |
ECCN: | EAR99 |
National Motor Freight: | 013540, Alum Nuts |
Download PDF Version MS21921-4D_Military-Fasteners-com.pdf |
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Product code MS21921-4D





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Military Fasteners is first on my list for the hard to find items so often associated with Government Projects. Brittany and Michael have always been quick to respond and nothing but professional in every way. I look forward to a continued relationship with Military Fasteners.
I called the customer service line just before Air Venture at Oshkosh to find out if they would have the parts I needed at their booth. The service rep on the phone was very helpful and was able to check the inventory that was taken to Oshkosh.I was told that the parts would not be available but could be shipped from the warehouse without delay. I ordered a full set of intake seals for a Continental 085 on the spot and they arrived in a few days. I am very happy with the service provided, and will be ordering more parts soon! Thank you Larry
Youre team did an excellent job as usual. The sheet metal and grommets arrived in excellent condition and were very well priced which I appreciate. Thanks again. Doug
Military Fasteners was recently added to our list of approved vendors and so far it has been an absolute pleasure working with them. The speed, communication, and coordination with our orders so far have been absolutely above and beyond. Sarah is an absolute all star and made the ordering process quick and seamless. 10/10 Would recommend to anyone looking for products!
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