what's the thead size of the auto radiator line? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

soundsailer · 03-20-2016, 07:22 PM

I've got to plug the tranny line holes in my radiator hoping someone knows the thread size ?

**70STOVEBOLT** · 03-20-2016, 08:07 PM

The line is 5/16 so you need a #5 inverted flare plug. Should be available at any Napa store.

soundsailer · 03-20-2016, 08:12 PM

Quote:

Originally Posted by 70STOVEBOLT

The line is 5/16 so you need a #5 inverted flare plug. Should be available at any Napa store.

Thanks!

soundsailer · 03-21-2016, 05:01 PM

Quote:

Originally Posted by 70STOVEBOLT

The line is 5/16 so you need a #5 inverted flare plug. Should be available at any Napa store.

the question was what the thread size was not the line size, , just for anyone else who misreads your reply it does not take a 5/16" threaded plug, back into town I go...................

**70STOVEBOLT** · 03-21-2016, 05:04 PM

Sorry to mislead you, but I didn't say the thread size was 5/16, I said the line was 5/16. If you ask for a #5 inverted flare plug, you should get the right thing. I should have qualified it by saying I don't know the thread size. Inverted flare is cataloged by the line size though.

**kwmech** · 03-21-2016, 05:45 PM

5/16'' inverted flare or tubing plug is 1/2-20 threading

03-20-2016, 07:22 PM	#1
soundsailer Registered User Join Date: Mar 2016 Location: Seattle, Wa. Posts: 12	what's the thead size of the auto radiator line? I've got to plug the tranny line holes in my radiator hoping someone knows the thread size ?

03-20-2016, 08:07 PM	#2
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Re: what's the thead size of the auto radiator line? The line is 5/16 so you need a #5 inverted flare plug. Should be available at any Napa store. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

03-21-2016, 05:45 PM	#6
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,504	Re: what's the thead size of the auto radiator line? 5/16'' inverted flare or tubing plug is 1/2-20 threading

03-21-2016, 05:04 PM	#5
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,266	Re: what's the thead size of the auto radiator line? Sorry to mislead you, but I didn't say the thread size was 5/16, I said the line was 5/16. If you ask for a #5 inverted flare plug, you should get the right thing. I should have qualified it by saying I don't know the thread size. Inverted flare is cataloged by the line size though. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear



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