An Fittings Dimensions

This specification dictates angle threading and the inside and outside diameters of hose the fittings are used in conjunction with.

An fittings dimensions. An fittings come in a variety of standardized sizes based on a long standing military specification. Port fittings function just like pipe fittings but with the following distinctions. What size are they really. The cone end uses straight thread and a 37 cone.

The numbers are equal to the outside diameter od of the tubing in 1 16. 3 8 and 6 i used to work for a japanese machine tool company and dealt with those fittings on a daily basis. An fittings and stainless steel lines. We also used jic on other equipment so i got pretty good at telling the 2 apart by eye.

Can you see the confusion starting. Therefore a 8 an size would be equal to 1 2 inch od tube. The number represents the od outside diameter of the tube the fitting was designed to fit in the old an specifications. An sizes are shown as a size number prefixed with a hyphen so a 10 fitting would be called a dash 10 an fitting.

Oddly enough they use inch designations and sizes for them just like jic e g. An fittings come in a range of sizes they are called the dash size because it has a dash followed by two digits. The male port end of the fitting uses straight thread and is received by a female port of corresponding size and thread pitch. An specifications are a popular standard met by all companies that manufacture an style performance.

Sometimes we encounter some confusion about the an specification. They may not be red or blue buy they ll fit just fine. Sizes for rigid tubes were already standardized with sizes called out by tubing od 3 16 1 2 etc. This article will explain the an standard and explain how our stainless steel lines and an fittings meet the specification perfectly as do most of the an fittings and stainless steel lines sold by our competitors.

An sizes range from 2 dash two to 32 in irregular steps with each step equating to the od outside diameter of the tubing in 1 16 inch increments. If you can t find an an fitting for your application find a local hydraulic shop and use simple sae fittings. However this system does not specify the id inside diameter of the tubing because the tube wall can vary in thickness. An hose sizes were designed to match the id sizes of these rigid tubes.

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 army navy sizes were established by the aerospace industry years ago. 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.