Jack Cooper wrote: > What is used to tap threads for AN fittings? Are there special AN taps, if so where do I get them?
What's normally done is you tap the hole with an NPT, and then screw an AN adapter into it. Then your AN fittings connect to this AN adpater, which has been screwed into an NPT threaded hole. Their catalog is at http://www.holley.com/Catalogs/EPP2003/EPP1-38.pdf , and the page 8 "technical section" explains all this kind of stuff. Page 30 and 31 show the kinds of adapters I'm talking about. I used Earl's Pro-Lite 350 hose and AN-6 fittings for all of my oil system and fuel system connections. I haven't had a leak of any description yet. I think AN taps are the kind of thing I'd expect a machine shop to do, but I could be wrong. I've never seen of these taps before, if that gives you an idea of how common they aren't. A Google search for AN-6 tap didn't yield anything that would get you there either. Mark Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
