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AN818-4 Tube Coupling Nut | 1/4 Tube | Steel Aircraft Fitting

AN818-4 Tube Coupling Nut | 1/4 Tube | Steel Aircraft Fitting

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AN818-4 Tube Coupling Nut

The AN818-4 is a short tube coupling nut manufactured to specification AN818 / SAE-AS4841. It is used in aircraft fuel, oil, hydraulic, and pneumatic systems to secure 1/4 inch (0.250") flare tubes.

Fabricated from cadmium-plated steel, it features 7/16-20 UNJF-3B threads, delivering high mechanical strength and reliable sealing when paired with the AN819-4 sleeve.

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