Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
American Flat 6


Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Factory air cleaner wing nut thread size?
Posted by: Duane1967 ()
Date: March 27, 2012 04:26AM

OK, I searched for 5 minutes, and found nothing. I lost/misplaced the wing nut
on my 67 2 carb original air cleaner. I figured it would be a 1/4 - 20 thread and when going to a couple of stores to get a new one, the 1/4 - 20 doesn't fit.

What is the thread size for this wing nut? The threads on the stud don't look jacked up, and the one I lost fit just fine.

Thanks for getting me back on thread!

Duane
1967 500 Coupe
Folsom, CA (Sacramento suburb)


Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: Vairismo ()
Date: March 27, 2012 04:33AM

How much does it not fit? Are the threads damaged on either the strud or the new wingnut?
The new nut fits on another known 1/4-20 bolt? Just going through some thoughts.

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: Duane1967 ()
Date: March 27, 2012 04:45AM

I lost/misplaced the wing nut. So I got a 1/4-20 nut to check the size and it goes on about one turn, then binds. That same nut fits on a known 1/4 - 20 bolt. I tried a 1/4-28 and it doesn't even start. Both the nuts were new and fit on a corresponding threaded bolt. The threads on the air cleaner stud don't really look jacked up. But what other size could it be. Just for grins, tried a m6 and m7. First too small, 2nd too big.

Before rethreading the stud I wanted to know if anyone can confirm that it's supposed to be a 1/4 - 20 thread size.

Duane
1967 500 Coupe
Folsom, CA (Sacramento suburb)


Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: MattNall ()
Date: March 27, 2012 05:03AM

Seems like I've seen an awful lot of 1/4-20 nuts on the studs..





MODERATOR
Somewhere between Sea Mountain and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
.............................PG...................................Turbo

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: vairchet ()
Date: March 27, 2012 08:35AM

Every OEM early and late air cleaner mounting stud that I have are 1/4"-20.

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: 4carbcorvair ()
Date: March 27, 2012 11:44AM

1/4x18?

--------------------------------
Ronnie
Southern Maine.
[www.dirigocorvairs.com]
66 Corsa Convertible, 140, 4sp.




It doesn't leak, it's marking it's territory.

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: steve c goodman ()
Date: March 27, 2012 01:16PM

It is 1/4x20. Probably your old wing nut got well used through the years. Just run a thread chaser over the stud and a new wing nut.

Sincere regards, Steve

1962 spyder 3.0L turbo 1967 monza 110/4
1968 monza 110/4 1971 amante gt 110/4

Golden, Colo. CORSA/RMC/PPCC

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: 4carbcorvair ()
Date: March 27, 2012 05:33PM

Or someone replaced the threaded rod with a different thread pitch?

--------------------------------
Ronnie
Southern Maine.
[www.dirigocorvairs.com]
66 Corsa Convertible, 140, 4sp.




It doesn't leak, it's marking it's territory.

Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Posted by: Duane1967 ()
Date: March 28, 2012 04:25AM

It has to be a 1/4 - 20. I'll run a threader over it a remake it a new 1/4 - 20 again. Weird how the wing nut I lost fit on it so easily without any resistance.

Score, search, Life is good!

Duane
1967 500 Coupe
Folsom, CA (Sacramento suburb)


Options: ReplyQuote
Re: Factory air cleaner wing nut thread size?
Date: March 28, 2012 03:02PM

It sounds like your new wing nut is the "international standard"
Try running a tap thru the wingnut and leave the original stud alone.
Your original will probably turn up when you take the top shroud off!!




Corvanatics
to host the 2014 CorSA Int'l Convention July 21 to 25 at LeMay "America's Car Museum" - Be There!!
Dan Davis - Seattle ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ 65 Monza 140/4 'Vert Sierra Tan/Fawn (my current driver!!)
~ 1964 Monza 'Vert ~ 65 Monza 140/4 Evening Orchid w/ ivory/black int ~ 1962 Monza Wagon 102/4
1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

Options: ReplyQuote


Sorry, only registered users may post in this forum.
This forum powered by Phorum.