How is pneumatic fitting size measured?
How is pneumatic fitting size measured?
The sizing of a pneumatic fitting is defined by the size of vessels it connects to. Tubes, hoses, and pipes are sized based on inside diameter (ID) and outside diameter (OD), measured in inches (in) or millimeters (mm). A fitting designed to connect to a tube with a 2″ OD is rated as a 2″ OD fitting.
What is the difference between 3AN and 4AN?
-AN sizes are in 16ths of an inch. -3AN = 3/16″ ID hose, fittings use 3/8-24 SAE thread. -4AN = 4/16″ = 1/4″ ID hose, fittings use 7/16-20 SAE thread.
What is 3AN fitting?
The AN numbers refer to the tubing OD in sixteenths of an inch. 3AN hose has the same ID as a 3/16″ tube. This means that 6AN hose will not introduce any appreciable flow restriction in a fuel system designed around 3/8″ OD rigid tubing.
How big is a 16 AN fitting?
Plumbing Basics – AN Fittings & Hoses
| AN Size | Hose i.d. – Tube o.d. | SAE Thread Size |
|---|---|---|
| -10 | 5/8 in. | 7/8 in.-14 |
| -12 | 3/4 in. | 1 1/16 in.-12 |
| -16 | 1 in. | 1 5/16 in.-12 |
| -20 | 1 1/4 in. | 1 5/8 in.-12 |
What size threads are air fittings?
Thread sizes are typically 1/8″, 1/4″, 3/8″, 1/2″ or 3/4″ pipe thread. A fitting that has female pipe threads (FPT) can only mate to something with male pipe threads (MPT) that are of the same pipe thread size. Nominal – the inner diameter size that the compressed air passes through.
What size hose is 6AN?
The Good News
| Male Thread Size | AN Size* | Hose ID** |
|---|---|---|
| 7/16-20 | 4AN | 0.22″ |
| 9/16-18 | 6AN | 0.34″ |
| 3/4-16 | 8AN | 0.44″ |
| 7/8-14 | 10AN | 0.56″ |
Why are an fittings red and blue?
It is a US military-derived specification that dates back to World War II and stems from a joint standard agreed upon by the Army and Navy, hence AN. The Army-Navy involvement is also the origin of the red/blue color combination that was traditionally used in the anodized finishing process.
What are the adapter fittings for the 3an hose ends?
These adapter fittings (except the -3 hose end tees) all have male 3AN (3/8-24) threads on one end for use with standard 3AN hose ends. This 3AN/42 Degree Inverted Flare 7/16-24 brake adapter has a large enough hex (9/16″) to be used with a crush washer when sealing the 3AN side against a flat faced port.
Are all an fittings the same thread size?
Each AN size number has its own standard thread size [see column three of the chart]. These are the same thread sizes that have been used in aircraft and industrial applications for many years. For some odd reason, the automotive industry wants to make AN fittings sound like something special.
What size hydraulic fittings do I need for my application?
If you can’t find an AN fitting for your application, find a local hydraulic shop and use simple SAE fittings. They may not be red or blue, buy they’ll fit just fine. “AN” (Army-Navy) sizes were established by the Aerospace industry years ago. The numbers are equal to the outside diameter [OD] of the tubing in 1/16″.
