An Fitting Sizes Explained

The fitting sizes refer to the outside diameter of the rigid tubing that the fittings are intended for.

An fitting sizes explained. Understanding an fittings all an fittings have a mating flare seat at 37 degrees this guide will use the an name to refer to these fittings. An fittings incorporate a 37 angle at the ends to create the seal and they re sometimes referred to as jic fittings. Here is an an size chart. You will also notice that the size increments are 1 16 inch apart.

A fitting or adapter is used in pipe systems to connect straight sections of pipe or tube adapt to different sizes or shapes and for other purposes such as regulating or measuring fluid flow. The line drawings below depict actual sizes of the various common an thread sizes by dash number. The idea behind an hoses and an fittings was to provide a flexible alternative to rigid tubing in plumbing systems on aircraft and military vehicles. An thread sizes an army navy sizing was established many years ago by the u s.

3000 6000 class fittings are available in both threaded and socket weld types. 9000 class fittings are available in only the socket weld type. They are similar to other 37 flared fittings such as jic which is their industrial variant. A fitting listed at 3 dash three refers to the inside diameter of the fitting for instance a 3 an would fit a metal tube outside diameter of 3 16 inch.

An fittings come in a range of sizes they are called the dash size because it has a dash followed by two digits. When referencing an an fitting we re going to use a term called dash sizes. These fittings are used in plumbing to manipulate the conveyance of water gas or liquid waste in domestic or commercial environments within a system of pipes or tubes. Place fitting against base line.

Pipe thread size chart use the diagram below to find pipe thread size. Military to set a common standard for designating hose size. 2000 class fittings are available in only in threaded type. Lay your fitting over the appropriate drawing to determine what size fitting you have.

Can you see the confusion starting. Sizes for rigid tubes were already standardized with sizes called out by tubing od 3 16 1 2 etc. These fittings are available in four pressure temperature rating class. Explaining an fitting sizes subscribe.

An hose sizes were designed to match the id sizes of these rigid tubes. An fittings are a flare fitting using 37 flared tubing to form a metal metal seal. These fittings are used for small bore and low pressure piping. All of the an fittings that speedway offers will feature a 37 tapered flare.