NUT, COUPLING (P/N an818-4j) - New Surplus
P/N: an818-4j
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 | 1 Available |
Product Description
The AN818-4J is a coupling nut (B-nut) for 37-degree flared tube fittings per AN818 specifications. Constructed from corrosion-resistant steel, this -4 size nut accommodates 1/4-inch tubing when paired with the matching AN819 sleeve. The nut clamps the flared tube end against a male fitting to create a metal-to-metal seal in aircraft hydraulic systems.
Installation requires the correct sleeve and torque application per AN standards and aircraft maintenance procedures to ensure leak-free 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, COUPLING (P/N an818-4j)?
The AN818-4J is a coupling nut (B-nut) for 37-degree flared tube fittings per AN818 specifications. Constructed from corrosion-resistant steel, this -4 size nut accommodates 1/4-inch tubing when paired with the matching AN819 sleeve.
Does the an818-4j meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The NUT, 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 an818-4j 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 an818-4j.
Can I order the an818-4j in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT, COUPLING is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.
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