Monday, July 27, 2009

AN Thread Size and AN Fitting Size Chart

Measuring Inside Diameter 
Measuring outside "major" diameter

AN Dash Size Chart

AN fittings differ from commercial threads in that they are class 3 instead of class 2 and generally UNJF rather than commercial UNF. Threadform: UNJ -3A or 3B
Note: There is an entire industry supplying so-called "AN" fittings that do not meet aerospace standards. See my article at

Web App version of this chart. Bookmark the link below in your mobile device:

Dash and Thread Size Chart
Click on the Right button for next chart. Handy reference for sizing fittings and fasteners.

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