NUT (P/N ms21921d4) - New Surplus
P/N: ms21921d4
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 | 6 Available |
Product Description
The MS21921D4 is a flareless sleeve coupling nut designed for 1/4-inch tubing in aircraft hydraulic and fluid systems. Manufactured from aluminum alloy, this nut conforms to MS21921 specifications (superseded by SAE AS21921). It secures tubing by tightening over a matching flareless sleeve to create a leak-resistant joint.
Installation requires pairing with compatible flareless sleeve and tube size, then torquing per aircraft maintenance manual specifications. Commonly used in hydraulic line connections where reliable fluid containment is critical.
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 (P/N ms21921d4)?
The MS21921D4 is a flareless sleeve coupling nut designed for 1/4-inch tubing in aircraft hydraulic and fluid systems. Manufactured from aluminum alloy, this nut conforms to MS21921 specifications (superseded by SAE AS21921).
Does the ms21921d4 meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The NUT 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 ms21921d4 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 ms21921d4.
Can I order the ms21921d4 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.