NUT, TUBE COUPLING (P/N ms21921-8) - Serviceable, New Surplus
P/N: ms21921-8
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 |
|---|---|
| Serviceable | 10 Available |
| New Surplus | 107 Available |
Product Description
The MS21921-8 is a steel tube coupling nut for 1/2 inch OD flareless tubing. It clamps a compression sleeve onto an externally threaded fitting to create a leak-tight joint in aircraft fluid systems. Designed to MS21921 specifications, this nut is commonly used on hydraulic lines in airframe and engine bays where vibration resistance and reliability are critical.
Installation requires the correct matching sleeve and fitting; torque per aircraft maintenance manual or applicable MS/AS fitting data to ensure proper clamp load and seal integrity.
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 ms21921-8)?
The MS21921-8 is a steel tube coupling nut for 1/2 inch OD flareless tubing. It clamps a compression sleeve onto an externally threaded fitting to create a leak-tight joint in aircraft fluid systems.
Does the ms21921-8 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 ms21921-8 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 ms21921-8.
Can I order the ms21921-8 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT, TUBE COUPLING is available in: Serviceable, New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.
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