Quick help on tube size please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

glock35ipsc · 08-31-2009, 10:05 AM

Does anyone know what size fittings I need for the trans cooler lines where they attach to the radiator? Are they 1/4" NPT?

Thanks!

James McClure · 08-31-2009, 10:41 AM

Glock, flare nut fittings, all flare nut fittings are machine threads NOT an NPT thread. Machine threads are straight and NPT is tapered. I don't know what size the flare nut is, I just mant to make sure you don't mistakenly try to use NPT for this application. I would try to find a fitting that screws in ok and then go to the parts store and match one up. jim

Damien · 08-31-2009, 11:08 AM

Trans cooler is 5/16 line. So you need an inverted flair nut for 5/16 line. I'm not sure on the actual thread size, but it is a straight thread and not a pipe thread.

glock35ipsc · 08-31-2009, 01:43 PM

Found it, -6 AN male to 1/2"-20 inverted flare.

Thanks!!

08-31-2009, 10:05 AM	#1
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Quick help on tube size please Does anyone know what size fittings I need for the trans cooler lines where they attach to the radiator? Are they 1/4" NPT? Thanks! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

08-31-2009, 10:41 AM	#2
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Quick help on tube size please Glock, flare nut fittings, all flare nut fittings are machine threads NOT an NPT thread. Machine threads are straight and NPT is tapered. I don't know what size the flare nut is, I just mant to make sure you don't mistakenly try to use NPT for this application. I would try to find a fitting that screws in ok and then go to the parts store and match one up. jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

08-31-2009, 11:08 AM	#3
Damien Registered User Join Date: Mar 2007 Location: Farmington, MN Posts: 928	Re: Quick help on tube size please Trans cooler is 5/16 line. So you need an inverted flair nut for 5/16 line. I'm not sure on the actual thread size, but it is a straight thread and not a pipe thread. __________________ I can still count my vehicles on two... wait three hands.

08-31-2009, 01:43 PM	#4
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Quick help on tube size please Found it, -6 AN male to 1/2"-20 inverted flare. Thanks!! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE



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