Oil cooler thread size

[79royale]

I'm ordering a new oil cooler and trying to figure out the oil fitting thread size. I'm not sure if I have an AN8 or AN10. The female thread diameter is 0.75" and the male thread diameter is .81". Any help is appreciated!

[Dave Gomberg]

AN sizes are based on sixteenths of an inch. In your case, .75 inch is 12/16 inch, so you are dealing with -12 fittings.

Dave

[Steve Demeter]

Look in the Pegasus catalog.

They have full size to scale drawings of nearly all of the fittings we would come across in racing, including the AN series.

[79royale]

Thanks guys.....

[kea]

79 Royale,
Look on our web site, in the oil cooler section, for information on the different thread types for oil coolers.
www.racing-stuff.com
Keith

[79royale]

Kea,

I was actually looking at your website yesterday when my question came up. Your chart lists an 8AN fitting as a .75" thread diameter and the 10AN as .87" diameter. Which gets to the root of my question. Is that diameter measured from the diameter of the female treads or male threads? If its the female than I have an 8AN....

Thanks,

Dave

[kea]

The size is for the thread OD. It sounds like (which would be common) that you have a 1/2 BSP hose end, which measures approx. .75" ID.
Keith

[79royale]

[size=2]The charts are helpful, but I'll try to make this question more clear. I have a AN style fitting on my oil cooler. I am trying to measure the diameter of the threads. If I measure the diameter from the pointy part of the thread (peak of the thread to opposing peak thread), the diameter is about 7/8", which would make it a 10 AN. If I measure from the valley of the thread to the opposing valley of the thread, the diameter is 3/4", which would make it an 8 AN (according to the Pegasus chart). The ID is 1/2". Do I measure the diameter from the outer point of the thread or the valley of the thread? [/size]

[size=2]Thanks![/size]

[kea]

point to point.
Keith

[Charles Warner]

Guys,

You are making this way too hard. When dealing with AN fittings simply measure the tube size (ID of the passage the fluid travels through.) -16 equals 1 inch. -8 equals .500 inch. -4 equals .250 inch. Anyone see a pattern?

[79royale]

Thanks guys. I'm all clear now.