NUT (P/N an818-4d) - New Surplus
P/N: an818-4d
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 | 81 Available |
Product Description
The AN818-4D is an aluminum alloy tube coupling nut (B-nut) designed for 1/4-inch 37° flared tubing connections. This nut clamps the flare sleeve against a mating fitting to create a secure metal-to-metal seal in fuel line assemblies. Install with an AN819 sleeve on properly flared tubing and tighten to aircraft maintenance manual specifications.
Standard hardware for general and commercial aviation fuel system connections.
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 an818-4d)?
The AN818-4D is an aluminum alloy tube coupling nut (B-nut) designed for 1/4-inch 37° flared tubing connections. This nut clamps the flare sleeve against a mating fitting to create a secure metal-to-metal seal in fuel line assemblies.
Does the an818-4d 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 an818-4d 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 an818-4d.
Can I order the an818-4d 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.