The nominal outside diameter of the tubing is expressed in sixteenths of an inch increments and then given an equivalent dash number. Fortunately each an size will always correlate with one specific fitting size.
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How to measure a n fittings. Just measure the outside diameter od or inside diameter id as illustrated in the picture above. Male an adapter identification chart. You can convert any an fitting to its nominal inch size by dividing the an number by 16 as follows. For example a 1 mpt pipe thread has an outside diameter of 1315 npt size thread diameter od of mpt id of fpt will be slightly less than this 18 0405 14 0540 38 0675 12 0840 34 1050 1. For example an 8 an fitting translates to an 816 inches or 12 inch. Wrap a string around the pipe.
There are no exceptions so there is no guesswork. Hose diameters are assigned an numbers. Measuring outside major diameter an dash size chart an fittings differ from commercial threads in that they are class 3 instead of class 2 and generally unjf rather than commercial unf. Measure the outside diameter od of your pipe or pipe fitting. Measure the length the first step is the easiest. Use this handy chart to determine the an fitting size based on corresponding thread sizes.
You should lay the fitting on a table and stretch the tape across the top of it to determine its length. The od measurement for a male connection should be taken near the base of the threads farthest from the end of the part. All thats needed to determine the length of a hydraulic fitting is measuring tape and a keen eye. Measure the thread od and pitch and you know the fitting size. Mark the point where the string touches together. A 38 standard hose equals 6 an.
The outside diameter of each pipe fitting must be measured and compared to the table for size identi fication. The pit stop usa difference were the experts we help you find a way to win. 4 an 416 or 14. Using your automotive hose size choose from the chart below to find the an equivalent for hose hose ends and adapter fittings. Thread size chart for an fittings. Huge selection over 100000 products from the top performance brands.
Use a ruler or measuring tape to find the length between the tip of the string and the mark you made circumference divide the circumference by 314159. Ordering an plumbing fittings can be confusing because the nomenclature does not directly translate into a thread size.
Gallery of How To Measure A N Fittings
