NUT, TUBE COUPLING (P/N ms21921-4) - As Removed
P/N: ms21921-4
Category: Fasteners & Hardware
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| As Removed | 2 Available |
Product Description
The MS21921-4 is a flareless tube coupling nut designed for 1/4 inch tube OD connections. This steel nut secures a mating sleeve to a 24° cone fitting, creating a leak-tight seal in aircraft hydraulic systems. Installation requires pairing with the corresponding sleeve and preset according to AS18280 specifications.
Verify tube size and thread compatibility per the aircraft maintenance manual before assembly. Manufactured to MS21921 military standards for aerospace fluid line applications.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the NUT, TUBE COUPLING (P/N ms21921-4)?
The MS21921-4 is a flareless tube coupling nut designed for 1/4 inch tube OD connections. This steel nut secures a mating sleeve to a 24° cone fitting, creating a leak-tight seal in aircraft hydraulic systems.
Does the ms21921-4 meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The NUT, TUBE COUPLING conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.
What material is the ms21921-4 manufactured from?
Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the ms21921-4.
Can I order the ms21921-4 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT, TUBE COUPLING is available in: As Removed. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.