What thread size is an AN -6 fitting?

Per the chart, an AN -6 fitting uses a 9/16-18 SAE thread and corresponds to a 3/8 hose size.

What hose size does an AN -10 fitting match?

AN -10 corresponds to a 5/8 hose size with a 7/8-14 SAE thread.

How many threads per inch is 1/4 NPT?

According to the NPT chart, 1/4 pipe thread has 18 threads per inch and a 1/4 inside diameter.

What is the thread size for an AN -8 fitting?

AN -8 uses a 3/4-16 SAE thread and matches a 1/2 hose size.

What is the threads-per-inch for 1 inch NPT?

The chart lists 1 inch pipe thread as 11-1/2 threads per inch with a 1 inch inside diameter.

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AN Fitting & NPT Thread Size Chart - AN-3 to AN-20 Hose & SAE Thread Sizes

and NPT fitting thread size charts with scaled fitting silhouettes

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(Army-Navy) and NPT pipe thread size reference charts with hose sizes, threads-per-inch and scaled fitting silhouettes.

AI caption November 2010 · Photo 248 of 1799

This document is a two-part plumbing/fitting reference chart. The top section is an AN (Army-Navy) Fitting Thread Size Chart presented as a yellow table with three columns: AN Size, Hose Size, and Thread Size. It covers AN sizes -3 through -20, matching each to its equivalent hose size (3/16 through 1-1/4) and SAE thread specification (3/8-24 SAE through 1-5/8 SAE). Below the table, blue graphics visually depict the relative physical sizes of -16, -12, -10, -8, -6, -4, and -3 fittings. The lower section is an "NPT" (National Pipe Thread) Thread Size Chart in a cyan table listing pipe thread sizes 1/8 through 1, their threads per inch (27, 18, 18, 14, 14, and 11-1/2 respectively), and inside diameters (matching the nominal pipe thread size). Black graphics beneath show the relative sizes of 1/8", 1/4", 3/8", 1/2", 3/4", and 1" NPT fittings. A reader can use this chart to identify AN fitting sizes, match AN sizes to hose sizes and SAE threads, and identify NPT thread pitch and diameter — useful for fuel, oil, coolant, and brake plumbing work on any vehicle.

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Frequently asked questions

What thread size is an AN -6 fitting?: Per the chart, an AN -6 fitting uses a 9/16-18 SAE thread and corresponds to a 3/8 hose size.
What hose size does an AN -10 fitting match?: AN -10 corresponds to a 5/8 hose size with a 7/8-14 SAE thread.
How many threads per inch is 1/4 NPT?: According to the NPT chart, 1/4 pipe thread has 18 threads per inch and a 1/4 inside diameter.
What is the thread size for an AN -8 fitting?: AN -8 uses a 3/4-16 SAE thread and matches a 1/2 hose size.
What is the threads-per-inch for 1 inch NPT?: The chart lists 1 inch pipe thread as 11-1/2 threads per inch with a 1 inch inside diameter.