Coupler Information Center

Basic Size This defines the air handling capacity of the coupler. The most popular size for automotive shop use is the Basic Size, which handles air volumes up to approximately 35 SCFM (Standard Cubic Feet per Minute). This size coupler readily connects and disconnects under normal air line pressure. The 3/8 Basic Size will handle air volumes up to about 60 SCFM. For air volumes above this amount, use the Basic Size. These sizes are not intended to be connected or disconnected under normal line pressure. Do not confuse the Basic Size with the pipe thread size. The latter specifies only the size of the pipe fitting the coupler or plug connects to and has nothing to do with air volume.

Style Ten different coupler/plug styles are in current automotive and industrial usage. They were originally developed by different coupler manufacturers. There is no advantage of one over the other, although the Industrial Interchange types (Styles M, H & G) are the most popular. Normally, the various styles are not interchangeable. But all couplers and plugs bearing the same letter (e.g., M-style) will work together. Notice there are two G-styles with different plug designs; these are interchangeable.

What is the "(+.18)" beside the item number I want to order in the drop down menu? ?

Download a PDF copy of our complete catalog This catalog includes every fitting on our website. *Please note, this catalog is 126 pages so the file may take a minute or two to download depending on your computer speed and your internet connection download speed.

airbrake fittings | airline swivels | ball valves | bottle gas fittings | brass pipe fittings | bronze fittings | composite fittings | compression fittings | cross reference | double barb fittings | download catalog | eaton fuller fittings | faqs | fitting assortments | fitting finder chart | flareless fittings | garden hose fittings | grease whip hoses | grease zerks | hose barbs | hose clamps | hose ferrules | hose tools | hydraulic adapters | hydraulic couplers | hydraulic flanges | inverted flare fittings | metric adapters | push-to-connect fittings | plastic caps & plugs | quick couplers | re-coil air hose | rfq | sae 45 flare brass fittings | specials | stainless steel fittings | threaded sleeve | thread id | valves

For Experienced Technical Support
Contact the "Fitting Specialists"


Tell Others About This Site

Send an email to a friend to let them know about this site.

Privacy Policy