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Author
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Topic: -AN & NPT diameters ?? Help !!
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Pierre
Gearhead Posts: 661
From: Near Paris, France
Registered: Apr 2002
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posted 04-30-2006 01:14 PM
 
Very boring topic I am sorry but I am trying to pick the right combo of connectors & lines for my fuel lines and I am totally  My stock 302 fuel-pump-to-carb line has a 1/2" diameter threaded nut going into the pump(feeding the carb), is that a 1/2" NPT ?
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Mark Ugrich
Gearhead Posts: 351
From: Waukesha, Wisconsin,U.S.A.
Registered: Jan 2006
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posted 04-30-2006 02:52 PM
If the nut is 1/2" dia. then it's a 3/8 tubing or flare nut, which is different from a 3/8 NPT. If you're trying to install a braided line from the fuel pump to the carb, You need an adapter fitting that threads into the outlet on the pump and adapts to dash 6 or dash 8 AN braided line, depending on how big you want the line to be.
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Pierre
Gearhead Posts: 661
From: Near Paris, France
Registered: Apr 2002
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posted 04-30-2006 03:53 PM
quote:
Originally posted by Mark Ugrich:
If the nut is 1/2" dia. then it's a 3/8 tubing or flare nut, which is different from a 3/8 NPT. If you're trying to install a braided line from the fuel pump to the carb, You need an adapter fitting that threads into the outlet on the pump and adapts to dash 6 or dash 8 AN braided line, depending on how big you want the line to be.
I get it now, after reading your reply I stumbled accross this pdf: http://www.omega.com/temperature/Z/pdf/z261-262.pdf NPT is a Cone type thread. the Flare nut to NPT adapter is not listed anywhere I may have to change pump if I want to do this. These fitting sure don't come cheap !! Thank for your reply
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Mark Ugrich
Gearhead Posts: 351
From: Waukesha, Wisconsin,U.S.A.
Registered: Jan 2006
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posted 04-30-2006 04:36 PM
Try Jegs or www.aeroquip.com. I have to believe that there is an adapter for your application. If you have an aeroquip dealer anywhere nearby I'd check with them also. 
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68 S-code GT
Gearhead Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 04-30-2006 11:18 PM
If you have any small airports near you they might be able to hook you up. I picked up a racecar parts catalog from an aircraft supply place. http://www.aircraft-spruce.com/
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Steve-UK
Gearhead Posts: 392
From: Wickford, Essex, England
Registered: Jan 2003
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posted 05-01-2006 04:16 PM
Hi I was just looking at the Summit site and found this Inverted Flare to -6AN this might be what you are looking for.If you find the bit you are looking for drop me an email as I am in England, and I bring bits over from Summit on a regular basis. Steve
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Moneymaker
Administrator Posts: 29200
From: Lyons, IL, USA
Registered: May 99
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posted 05-01-2006 07:53 PM
I beg to differ guys, but a half inch flare nut would accomodate a 5/16 line only.
3/8 lines use a 5/8 head flare nut.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Mark Ugrich
Gearhead Posts: 351
From: Waukesha, Wisconsin,U.S.A.
Registered: Jan 2006
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posted 05-01-2006 10:31 PM
quote:
Originally posted by Moneymaker:
I beg to differ guys, but a half inch flare nut would accomodate a 5/16 line only.
3/8 lines use a 5/8 head flare nut.
Alex is right . I think I forgot to carry the double naught. 
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Pierre
Gearhead Posts: 661
From: Near Paris, France
Registered: Apr 2002
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posted 05-02-2006 03:16 PM
Thanks guys, this is exactly what I was looking for.
Thanks for the offer Steve, my mother in law is coming soon, I'll give her this delicate mission 
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Steve-UK
Gearhead Posts: 392
From: Wickford, Essex, England
Registered: Jan 2003
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posted 05-02-2006 06:19 PM
Hi Pierre, You will have to let me know what one you want, and I will not be bring another over for a couple of weeks, as I had one arrive today, but something like that I can always post to you. Steve
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Mark Ugrich
Gearhead Posts: 351
From: Waukesha, Wisconsin,U.S.A.
Registered: Jan 2006
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posted 05-02-2006 10:43 PM
Pierre, get the fitting that steve suggested. The threads are 1/2 20 on the tube nut. You'll need an adapter fitting for the carb also. I'd recommend -6 hose.
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