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AN to AN Fittings

AN fittings and adapters, used to connect hoses and rigid tubing that carry fluids, were originally developed during WWII in agreement between the Army and Navy for a particular thread specification, thus the name AN, which stands for Army/Navy.

When it comes to automotive performance adapter fittings, whether it's AN unions, AN reducers or couplers, no one beats Redhorse Performance fittings. These CNC-machined AN fittings and adapters are hand-polished, color matched and race tested – often imitated but never equaled for quality, durability and good looks. Here you have a complete selection of Redhorse AN to AN reducers, adapters and couplers, including male to male, female to female and male to female. Just click on the appropriate subcategory to find the part type you require.