NUT TUBE COUPLING (P/N as21921-5) - New Surplus
P/N: as21921-5
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 |
|---|---|
| New Surplus | 120 Available |
Product Description
The AS21921-5 is a flareless tube coupling nut designed for 5/16-inch aircraft tubing. This nut clamps a compression sleeve onto an externally threaded fitting body, creating a leak-tight seal in hydraulic and pneumatic systems. The coupling assembly works without flaring the tube end, simplifying installation and repair.
Assembly requires matching the nut with the appropriate AS21921 sleeve and fitting body, then tightening to secure the tube. Verify tube diameter and thread specifications against the aircraft maintenance manual and Illustrated Parts Catalog before installation.
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 as21921-5)?
The AS21921-5 is a flareless tube coupling nut designed for 5/16-inch aircraft tubing. This nut clamps a compression sleeve onto an externally threaded fitting body, creating a leak-tight seal in hydraulic and pneumatic systems.
Does the as21921-5 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 as21921-5 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 as21921-5.
Can I order the as21921-5 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT TUBE COUPLING is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.