5/16" tube to 1/4" NPT question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Alex Hayley · 11-19-2009, 01:16 PM

Does anyone know of a fitting that would allow me to connect a 5/16" SS hardline to a 1/4" NPT female fitting? The application is to connect a transmission cooler (http://www.summitracing.com/parts/DER-13261/) using 5/16" SS hardline.

joedoozer · 11-19-2009, 02:03 PM

You mean like this?

http://www.valleyhydraulic.com/Brass...ted_Flare.html

You should be able to get fittings like that at any parts store. You might need to step it down though. I mean a real parts store. Not the ones that sell exhaust tips, seat covers and license plate frames.

cdowns · 11-19-2009, 04:04 PM

summit has all the fittings you'd need// you'll need tools to flare the SS tubing

Alex Hayley · 11-19-2009, 04:31 PM

Quote:

Originally Posted by joedoozer

http://www.valleyhydraulic.comBrass...ted_Flare.html

That is exactly what I need. THANKS!!!

Quote:

Originally Posted by cdowns

summit has all the fittings you'd need// you'll need tools to flare the SS tubing

Apparently not in this case. I have communicated with Summit a few times and they do not have the fittings needed.

*Shane* · 11-19-2009, 05:27 PM

you don't want to put that stainless line on a brass fitting ... you will never get a proper seal because of the stainless being harder than the brass. You need the tubing to deform around the inverted flare in the fitting to make the proper seal.

Why are you stuck on using 5/16" line? You can easily do what you are trying to achieve with either 3/8" or 1/2" line and a 1/4" NPT tubing adapter.

Alex Hayley · 11-19-2009, 07:40 PM

Quote:

Originally Posted by Shane

you don't want to put that stainless line on a brass fitting ... you will never get a proper seal because of the stainless being harder than the brass. You need the tubing to deform around the inverted flare in the fitting to make the proper seal.

Why are you stuck on using 5/16" line? You can easily do what you are trying to achieve with either 3/8" or 1/2" line and a 1/4" NPT tubing adapter.

Thanks for the advise. I am thinking of using 5/16" simply because that is how it came from the factory if I am not mistaken.

Alex Hayley · 11-20-2009, 01:16 AM

TTT, is there any reason not to use 5/16" tubing?

beautimus · 11-20-2009, 02:10 AM

Not trying to plug anyones product but i have used this stuff for a lot of things

Theres a company called swedgelock. (not sure of the spelling).
you should have local distributers for their stuff. they make stainless fittings that should work for you. they even have compression fittings that they guarantee, not to leek or come apart before the tubing rips. i would trust there compression stuff before i would trust anyones flare fittings. its that good.

*Shane* · 11-20-2009, 08:31 AM

Quote:

Originally Posted by Alex Hayley

TTT, is there any reason not to use 5/16" tubing?

Other than not being able to find and use the proper fittings? No.

11-19-2009, 01:16 PM	#1
Alex Hayley Registered User Join Date: Jul 2000 Location: NC Posts: 987	5/16" tube to 1/4" NPT question Does anyone know of a fitting that would allow me to connect a 5/16" SS hardline to a 1/4" NPT female fitting? The application is to connect a transmission cooler (http://www.summitracing.com/parts/DER-13261/) using 5/16" SS hardline.

11-19-2009, 02:03 PM	#2
joedoozer is Certifiable Join Date: Feb 2008 Location: Hinesville, Georgia Posts: 160	Re: 5/16" tube to 1/4" NPT question You mean like this? http://www.valleyhydraulic.com/Brass...ted_Flare.html You should be able to get fittings like that at any parts store. You might need to step it down though. I mean a real parts store. Not the ones that sell exhaust tips, seat covers and license plate frames. __________________ 1972 Chevy C10 LWB 350 Auto Blue with a white roof. Last edited by joedoozer; 11-19-2009 at 02:04 PM.

11-19-2009, 04:04 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: 5/16" tube to 1/4" NPT question summit has all the fittings you'd need// you'll need tools to flare the SS tubing __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

11-19-2009, 05:27 PM	#5
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: 5/16" tube to 1/4" NPT question you don't want to put that stainless line on a brass fitting ... you will never get a proper seal because of the stainless being harder than the brass. You need the tubing to deform around the inverted flare in the fitting to make the proper seal. Why are you stuck on using 5/16" line? You can easily do what you are trying to achieve with either 3/8" or 1/2" line and a 1/4" NPT tubing adapter.

11-20-2009, 01:16 AM	#7
Alex Hayley Registered User Join Date: Jul 2000 Location: NC Posts: 987	Re: 5/16" tube to 1/4" NPT question TTT, is there any reason not to use 5/16" tubing?

11-20-2009, 02:10 AM	#8
beautimus Registered User Join Date: Mar 2002 Location: woodstock, alabama, usa Posts: 938	Re: 5/16" tube to 1/4" NPT question Not trying to plug anyones product but i have used this stuff for a lot of things Theres a company called swedgelock. (not sure of the spelling). you should have local distributers for their stuff. they make stainless fittings that should work for you. they even have compression fittings that they guarantee, not to leek or come apart before the tubing rips. i would trust there compression stuff before i would trust anyones flare fittings. its that good. __________________ i survived cancer and kidney stones, but my kids are killing me.



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