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Oct 8, 2008 | 08:16 PM

john 67

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From: New York City

thread size question

is -3 an equal to 3/8-24 ?. Im doing my rear discs and need to get from the willwood supplied parts to my "t" by the rear. thanks, JOHN

Oct 8, 2008 | 08:43 PM

loweredd

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From: Struble, IA

Is the 3/8 a brake flare? If it is, then no. The 2 have a different sealing surface, for lack of a better word. AN is a 37* face, and the brake flare is 45*. Plus, it's a flare, it has a different fit. I know Speedway would have an adapter tee. Let me check back in quick with a picture of what I think you are talking about.

Oct 8, 2008 | 08:51 PM

loweredd

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From: Struble, IA

I take back what I wrote.....just get these, and screw them in the tee.

http://www.speedwaymotors.com/p/6462...M-Adapter.html

Oct 8, 2008 | 09:12 PM

john 67

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From: New York City

lowered , thanks for the reply i think i need that same type fitting by the caliper side which i just found in the willwood catalog,thanks for the link. JOHN

Oct 9, 2008 | 12:32 PM

Rodder

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The caliper side on my Wilwoods is 1/8 NPT.

Oct 9, 2008 | 02:02 PM

Ackattack1

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From: Valley Center KS

I don't know how much time I've spent researching and trying to find information on different fitting types: NPT, inverted flare, AN, metric bla bla bla. Its frustrating at times.....good luck!

Oct 9, 2008 | 03:31 PM

bczee

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From: Concord, CA

-3 AN is 3/16"..

The AN is a National standard for the US Military Specifications (Air Force and Navy = AN). A AN size of -1 would be 1/16 and goes up in 1/16" increments

Try this as a FYI for that late night reading..
http://en.wikipedia.org/wiki/AN_thread

Last edited by bczee; Oct 10, 2008 at 12:36 PM.

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Oct 10, 2008 | 04:24 PM

Steve VanS

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Remember that JIC 37deg fittings are compatible with AN fittings. Only differences:

1. JIC cost less
2. JIC are steel
3. AN thread form is, for example, 3/8-24-UNJ-3A with the "J" meaning an enlarged root-radius for high-reliability aircraft use.