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Tap & drill size

To: land-speed@autox.team.net
Subject: Tap & drill size
From: James Tone <gmc6power@earthlink.net>
Date: Thu, 4 Jan 2007 11:59:25 -0800 (GMT-08:00)
Anyone out there know the tap size for  AN-12  fittings. 

By comparasion it appears to have 12 threads per inch but a 1" 12 tap seems a 
little small. I need to tap a hole in an aluminum valve cover and I would 
rather not weld to it and I don't have room for a bulkhead nut.   Thanks 




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