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 246 of 1787

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.