NUT,TUBE COUPLING (P/N ms21921-12d) - New Surplus
P/N: ms21921-12d
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 | 2 Available |
Product Description
The MS21921-12D is an aluminum alloy tube coupling nut for 3/4-inch flareless aircraft tube fittings. This nut clamps the MS21922 sleeve to the fitting body, creating a leak-free connection in hydraulic systems. Commonly used in CH-47 and other military/commercial aircraft hydraulic lines, the MS21921-12D follows Military Standard MS21921 specifications.
Installation requires proper torque sequencing per the aircraft maintenance manual and illustrated parts catalog to ensure system integrity and prevent leakage under pressure cycling.
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 ms21921-12d)?
The MS21921-12D is an aluminum alloy tube coupling nut for 3/4-inch flareless aircraft tube fittings. This nut clamps the MS21922 sleeve to the fitting body, creating a leak-free connection in hydraulic systems.
Does the ms21921-12d 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 ms21921-12d 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 ms21921-12d.
Can I order the ms21921-12d 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.
Related Fasteners & Hardware
- BOLT – P/N std3053-11
- BOLT – P/N HL19-10-10
- WASHER – P/N 50823-001
- BOLT,SHEAR – P/N nas6204-9
- BOLT – P/N NAS583-13
- WASHER – P/N m1457
- BOLT FORGED – P/N 660710319
- BOLT – P/N bacb30pe5-24x
- WASHER – P/N an936-a6
- BOLT-.375-24 X 1.95 LG HX HD – P/N an6-17
- BOLT,CLOSE TOLERANCE – P/N nas1306-34
- BOLT, MACHINE – P/N an3-30a