How to measure threads

By using a combination of three tools, identifying connectors is easy to do.

A caliper is used to measure the O.D. of a male thread and I.D. of a female thread.

NOTE: When comparing your measurements with those on our charts it should be remembered that threads can become worn and distorted from use and you may not compare exactly to the figures in the tables.

For your convenience, dimensions are in both millimeters and inches.

The thread pitch gauge measures the threads per inch. For metric threads the gauge will identify the distance between the threads.

The seat angle gauge is used by placing the gauge angle on the sealing surface. The centerline of the end fitting and the gauge should be parallel.

In the English system the thread size and pitch (number of threads per inch) are given, along with the thread type.

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 | reusables | 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