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You can use an AN Sizing chart to match a particular size of AN fitting to the type of hose that will match. The below chart shows how AN size is determined. The number for the AN size is equivalent to how many sixteenths of an inch it is in size for inside diameter.
AN fittings come in a range of sizes, they are called the ‘dash size’ because it has a dash followed by two digits. Here is an AN size chart that confirms thread information along with its AN dash size and a visual guide to what that means in actual size. AN Thread & Size Information MALE UNION FEMALE UNION
Quick reference tabels for AN fittings from -2 to -32 and Hose fractional equivalent charts.
Do you measure outer diameter or inner diameter? Thread inside or outside diameter? We'll cover how to do this right here! AN fittings are an abbreviation of Army-Navy and came during the Second World War when lighter and better tolerance fittings than ordinary hydraulic once was needed.
In this guide, we will explore the dimensions of AN fittings, covering both male and female thread tables, corresponding AN sizes, equivalent nominal OD tube sizes, hose inner dimensions, and male fitting inner dimensions. We will specifically focus on AN sizes ranging from 4AN to 16AN.
AN Size Thread Size (UNJC) Hose Size Max Torque in Ft lbs B Nut Size Closest NPT Size ‐03 3/8‐24 3/16 8.75 1/2 ‐04 7/16‐20 1/4 11.5 9/16 1/8
AN Hose and Fitting Size Charts. As fuel line sizes, and tubing in general, differ across makes and models, it’s useful that AN hoses are offered in so many sizes (and also that the tubing can be easily customized using the various AN fittings).
Fortunately, each AN size will always correlate with one specific fitting size. There are no exceptions, so there is no guesswork. Measure the thread OD and pitch, and you know the fitting size.
While many variations are offered, column four in the chart shows which AN size corresponds to each NPT size when inside diameters (flow dimensions) are considered. All Earl’s SWIVEL-SEALTM hose ends are designed to provide little or no restrictions when used with the corresponding AN fitting size.
The table below lists the specifications of An Fitting Size Chart ranging from dash-two to dash-thirty-two, along with the corresponding SAE thread sizes. QC Hydraulics is a supplier of AN and JIC fittings and adapters for over 20 years.