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Different Components of AN Fittings

The “AN” in AN Fittings alludes to “Army/Navy”. The military used the AN fittings for hose carrying fluids. It’s a set of sizes and fixing strategies, for effective and widespread plumbing over diverse military branches.

The different types of AN fittings are listed below.

  1. Hose Ends

It is any fitting that joins with a hose, no matter the fashion of hose, or sort of association. On the off chance, if it connects specifically on to a hose, then it is said to be hose ends.

  • Couplers

Consists of a female fitting with the identical size which joins with two male fitters. The relation is still the same on either end, and an adapter is the only different component here.

  • Union

It consists of a male fitting of the same dimension, joining two threaded joints, sharing only the same connection at either end. Anything else is called an adapter, and anything with feminine ends is a connector or a coupler.

  • Adapters

One can define adapters as those components that join two or more parts of different sizes and fittings together.

  • Bulkhead Fitting

A bulkhead fitting is one of the easiest ways of going through a tank or firewall fuel, a split, or other lines. One may use it with a rigid hard-line or with flexible paddle ends. A bulkhead is also ideal for transferring positions, for the motor vibration from one line to another. Bulkhead fittings are a type of union of males/males with an extended thread at one end. For the locking nut, the extended thread is used and for binding as well, as it has two sets of threads. This type is perfect for pushing into a firewall, engine cabin, tank, etc. 

There are other types of fittings too, such as T fittings and Y fittings, which as the name suggests are in that shape.

Several types of threads are present, such as standard flare male AN, National Pipe Thread NPT, ORB or O-Ring Boss, and National Pipe Straight; each kind has its sealing method. 

There are mainly two types of threads- flared and tapered. Tapered threads are also known as NPT pipe threads whereas one often refers to straight threads as AN O-ring. Both have their sealing methods. As a rule of thumb, sealing pastes should not be used on straight threads whereas one should not use washers or O-rings on tapered threads.

There exists, an array of adapters too. Adapters are those components that join other parts. Different types of adapters include AN male (both ends), AN female (both ends), AN with female and male threads, inverted flare to AN, ORB to AN, basically including multiple types of threads such as AN, NPS, AN to NPT. Each thread has a kind of adapter in a way. Some adapters connect carburettors and hose barbs. Hosebard adapters consist of a male AN flared thread on one end and a barb on the other. These are very similar to the push-lock style ends and are very useful in connecting rubber hoses breakers.

There are also several types of hose ends, and hoses themselves and the list is quite non-exhaustive. One important thing to note is that AN fittings must be appropriately chosen and sealed correctly with the right adapters and threads.

Author Bio: Steffy Alen is a copywriter and content strategist. She helps businesses stop playing around with content marketing and start seeing the tangible ROI. She loves writing as much as she loves the cake.


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