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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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-6 AN straight-cut size and threadpitch
Any machinists or fabricators out there that can confirm what the correct size tap is to thread for a male -6 AN straight-cut o-ring fitting?
I am making up a pair of fuel rails and am fitting supply and return lines on both sides. I found this chart which leads me to believe it is 9/16-18 or 3/8-18?  This is the kind of fitting I want to tap, sink the oring seat, and install:  Appreciate the right drill/bore and tap please!
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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02-16-2016, 07:18 PM
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Join Date: Apr 2008
Location: Houston TX
Posts: 8,723
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That is an SAE o-ring boss connection, so yes, 9/16-18 threads. I don't know what the undercut for the o-ring is, but some pictures make it look like yo just need to break the edge and put a 45 degree chamfer on it.
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Mike Bradshaw 1980 911SC sunroof coupe, silver/black Putting the sick back into sycophant! |
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02-17-2016, 06:05 AM
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Registered
Join Date: Apr 2008
Location: Houston TX
Posts: 8,723
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SAE O-Ring Boss Porting
Says 7/16 drill bit. S.A.E Ports MS16142 - J514f - J1926 Port Contour Cutters from Hannibal Carbide Tool - HANNIBAL CARBIDE TOOL, INC. makes a profile i guess?
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Mike Bradshaw 1980 911SC sunroof coupe, silver/black Putting the sick back into sycophant! |
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02-17-2016, 06:08 AM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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Thanks Mike!
__________________
2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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02-17-2016, 06:15 PM
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