An Army Navy Fitting Thread Size Chart

By Raja Apk 21 Jan, 2020

Where every dash number is 1/16 of an inch an an6 fitting would be equivalent to 6/16 or 3/8 fitting size. So this page provides as much information as i can find on the an / jic / sae37′ hydraulic fitting system.

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The fitting featured a 37 degree mating angle which provided superior sealing compared to the common 45 degree fittings and used a higher class of thread quality.

An army navy fitting thread size chart. An sizes, originally developed for use by the u.s. The sizing chart and numbering system was deviloped during world war ii where the armed forces used nitrous oxide systens to boost the power output of aircraft engines. (outside diameters) of the tubing in 1/16.

Goes over 1/4 steel brake line to fasten to bulkhead fitting. The origin is actually in the military and aerospace industry and an actually stands for army/navy. This standard of measurement is based on the nominal outside diameter (o.d.) of the rigid metal tube that each size fitting is used with.

(the chart below will clarify this point.) the numbers assigned equate to the o.d. Military to set a common standard for designating hose size. The numbers are equal to the outside diameter [od] of the tubing in 1/16.

The an thread is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. The similarities end with the fittings and the i.d. This fitting design was the forerunner of the current an and sae 37° flare fittings.

An sizes the numbers assigned equate to the o.d. They were originally used in the aerospace industry. An thread sizes (army/navy threads) commonly used on nitrous oxide systens.

Armed forces (a for army and n for navy), describe the outside diameter (o.d.) of tubing in 1. The an size reference the outer diameter of hose in 1/16th of an inch increments. Of the rigid metal tube that each size fitting is used with.

Typical with gauge senders, intake manifolds and older style fuel rails. Dash numbers are typically assigned based on the size. (the chart to the right will clarify this point.) the numbers assigned equate to the o.d.

An size and an thread size reference chart. An fittings are commonly used to make custom plumbing for fuel, oil, coolant etc. Tapered thread, seals with thread tape or paste.

The size specifications were established by the military back in world war ii. An fittings use a 37 degree flare as the sealing surface. The an sizing can be confusing at first but once you get used to it you can tell the size just by looking at the fitting.

Air force, with help from wright patterson air force base, developed a fitting with 37° flare angle, before wwii, which became known as the an fitting. Of the rigid metal tube that each size fitting is used with. An8 8/16 or 1/2 for example.

Of the rigid metal tube that each size fitting is used with. Place the an size over 16. An sizes are very simple.

This fitting had precision 3a/3b threads. An fittings, also known as army/navy, were originally developed as a military standard that dates back as early as world war ii. An (or army/navy) was never intended to characterize an entire fluid system, and is mostly designed as a thread specification.

The an thread is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. The sizing chart and numbering system was deviloped during world war ii where the armed forces used nitrous oxide systens to boost the power output of aircraft engines. Download this technical bulletin as a pdf understanding port threads, adapter fittings, and line sizes.

An sizes, originally developed for use by the u.s. You simply make a fraction out of the an size. A “3 an ” size fitting fits a 3/16″ hose size.

Since tubing and hoses can have different wall thicknesses, the size number does not necessarily tell you how large the inside diameter will be. (outside diameters) of the tubing in 1/16. This will cause leaks and damage to the fittings.

(inside diameter) of the hose is designed to match up to an equivalent hard line i.d. “an” stands for “army navy”, in reference to their original application with military equipment. Npt (national pipe thread) thread size chart.

A “10 an” hose fitting fits a 10/16″ hose size, better known as 5/8″.

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