7tonemonte Posted January 13, 2019 Share Posted January 13, 2019 I bought a fuel line from Edelbrock, part # 81233 It says it is designed to attach to a 3/8 NPT outlet on a fuel pump. I have a stock replacement on my small block, it is not a 3/8NPT, which I kind of knew. Trying to find an adapter but I have no idea the size on it. I brought the old fitting with me around and I can get 3/8 flared plumbing parts to screw into it, so what gives? The adapter that came with the new part does not thread in. Im trying to avoid putting a flared fitting and clamp on it. I also dont want to buy a new fuel pump, the higher flow ones have that 3/8 NPT. I was just hoping to get an adapter from the fuel pump to a -6AN male Edelbrock 81233 link Quote Link to comment Share on other sites More sharing options...
714024SPEED Posted January 13, 2019 Share Posted January 13, 2019 If you want to use an AN fitting you would need one that has 3/8 NPT to -6.just an fyi if your car is a small block car it has a 5 /16 metal fuel line so the -6 hose might not fit tight over the metal line.good luck Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted January 13, 2019 Author Share Posted January 13, 2019 55 minutes ago, 714024SPEED said: If you want to use an AN fitting you would need one that has 3/8 NPT to -6.just an fyi if your car is a small block car it has a 5 /16 metal fuel line so the -6 hose might not fit tight over the metal line.good luck The line I got from Edelbrock has a 3/8 NPT to -6AN fitting. The NPT will not thread into the fuel pump. Quote Link to comment Share on other sites More sharing options...
714024SPEED Posted January 13, 2019 Share Posted January 13, 2019 That's weird I have the same pump and had no problem. Maybe they taped the pump wrong? 1 Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted January 13, 2019 Share Posted January 13, 2019 What about a 3/8 inverted flare to -6? The stock pump uses a 3/8 inverted flare as opposed to a 3/8 NPT. 1 Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted January 13, 2019 Author Share Posted January 13, 2019 2 hours ago, MC1of80 said: What about a 3/8 inverted flare to -6? The stock pump uses a 3/8 inverted flare as opposed to a 3/8 NPT. That’s going to be my next try. If I can find that size Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted January 13, 2019 Share Posted January 13, 2019 Tony, that is a pipe thread, NOT a flare thread. In reality it is a tapered "pipe" thread. Regular pipe threads and Flare threads are different. rob 1 Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted January 13, 2019 Author Share Posted January 13, 2019 Found the fittings I think I need, I will keep my fingers crossed ! Appears to be this Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted January 13, 2019 Share Posted January 13, 2019 Hey Tony. That looks like the puppy! Good luck. Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted January 18, 2019 Author Share Posted January 18, 2019 Ugh, that is the wrong thread also. Gonna try calling a place this weekend for advice. Quote Link to comment Share on other sites More sharing options...
DragCat Posted January 20, 2019 Share Posted January 20, 2019 Sorry i'm late to the party , I think you need a 5/8 inverted flare connection for the fuel pump if its a SB with original style fuel pump. 1 Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted January 22, 2019 Author Share Posted January 22, 2019 On 1/20/2019 at 6:59 PM, DragCat said: Sorry i'm late to the party , I think you need a 5/8 inverted flare connection for the fuel pump if its a SB with original style fuel pump. That is correct. 5/8-18 inverted flare ended up being the one. I spoke with Bill at https://www.gofastfittings.com and he thought that was it, I did get a thread pitch gauge at Fastenal and that’s what it turned out needing. Anyone looking for AN fittings and plumbing, check that guy out. Super helpful, quality stuff, best prices I’d seen also. Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted January 23, 2019 Share Posted January 23, 2019 Tony, I'm glad to hear you got this straightened out. rob 1 Quote Link to comment Share on other sites More sharing options...
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