Description
In the world of fittings, a 7/16-20 UNF thread is the standard size for a 1/4″ tube.
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The Thread: 7/16″ diameter with 20 threads per inch.
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The Tube: It is designed to secure a 1/4″ metal pipe/tube.
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The Seal: It usually has a 37-degree flare. This is commonly known as an AN-4 (Army-Navy) or JIC 4 fitting.
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