67 L35 black lid wing nut shape

[Mike S]

Hello Group,

   I did search the CRG archives and couldn't find a definitive answer to my curiosity on these shapes.
Attached is an image of the two different style wing nuts used on my 67 L35 Camaros.
As you can see the LOS shape differs from the NOR shape. This is not to be confused with the
one available today that has a more pronounced bulge in the wing tab shapes similar to the NOR nut.
  Theses have been on the cars since I owned them since 1980. The archive did mention the shape of the nut on the LOS
was a correct for that period but the one from NOR is of question. I'm not sure if this is due to an engineering change in shape, the wrong one, or just a vendor variance (I doubt the vendor would change a shape without approval from GM).

  Can anyone shed some info on this? Is the NOR one correct? I also attached a picture from Ricks that has the same shape of the NOR nut.
My air cleaners are the black lid type used till mid '67 so no chrome nuts were used.

Thank You,
Mike

[big iron]

Mike,
Could we have an over head shot of the NOR wing nut?
Here is some ideas.
67 AIM L35 A8 and L30 A4 show that production wing nuts where used. Now, 6 C1 (6 cyl.) and 6 C2 (8 cyl.) show that 9418699 was used on both engines. It would be safe to assume that 9418699 was the production wing nut used on all engines except the 302 and the 396 375HP that used a chrome wing nut 219281. I believe that 219281 is the same wing nut as 9418699 and respecified with flash chrome.
68,69 AIM show the same thing ,just on different pages.
Do not think that small differences in appearance due to vendor manufacturing processes was of importance as long as vendors meet specifications set forth by the DRE engineer.
Bob

Anyone with a known untouched 67 survivor have a picture you could post would be appreciated.
Thanks.

[Mike S]

Hi Bob,

  Thanks for chiming in. I'll post top views when I get home today.
Interesting find in the AIM. I didn't look at the 6 cyl portions.

Mike

[KurtS]

The prints often would allow the supplier a lot of latitude, and still meet design intent. I wouldn't be surprised if it was just different suppliers.

[Mike S]

 Here is a picture of the top views.
I'm inclined to think that it is a supplier change as you indicate, Kurt. This nut has been on the car since I bought it
34 years ago so I can only assume it is original. My thinking is the larger wings make it more comfortable to loosen a nut that is too tight.

Thank You,
Mike

[big iron]

Anyone know why the chrome wing nut 219281 would have a 6 digit part number assigned instead of the conventional 7 digit number 9418699?
Just curious.
Bob

[Mike S]

Anyone know why the chrome wing nut 219281 would have a 6 digit part number assigned instead of the conventional 7 digit number 9418699?
Just curious.
Bob

My guess....the nut has been used for car model years prior.

Mike

[big iron]

NCRS Discussion Boards > Technical Discussion > 1963 air cleaner wing nut, #117204, #219281, or both?

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View Full Version : 1963 air cleaner wing nut, #117204, #219281, or both?

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David L.

December 26th, 2011, 02:34 PM

The 1963 Corvette AIM lists GM # 117204 as the part number for the air cleaner wing nut. GM # 117204 is a chrome plated "forged" type wing nut based on my research. The 219281 wing nut is a chrome plated stamped steel wing nut and first listed in the 1964 Corvette AIM. There is no part number change from the 117204 to the 219281 wing nut in the revision box in either the 1963 or the 1964 Corvette AIM.

 The 1963 Chevrolet Passenger car used two different wing nuts (not chrome plated) on the assembly line according to the AIM. GM # 148312 was replaced with GM # 9418699 on Feb. 12, 1963, but the actual assembly line change could have been a month or two later.

 The 9418699 wing nut is the same as a 219281 wing nut EXCEPT that it is not chrome plated.

 For those who have very original 1963 Corvettes:
 Did "early" 1963 Corvettes use the chrome plated "forged" type wing nut (GM # 117204) and "late" 1963 Corvettes use the chrome plated stamped steel wing nut (GM # 219281).

 Dave

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Timothy B.

December 27th, 2011, 07:01 AM

Back to the top as I have the same question..

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Jack P.

December 27th, 2011, 09:43 PM

This post caught my interest. I think my nut is an original 66 wing nut.

 Many of the posts give wall thickness size and tooling marks. It seems that some nuts that were used in 60-62 passenger cars, unchromed, were plated and used on corvettes , GM just changed numbers and vendors etc, etc, etc,

 The NCRS site seems down, so I thought I would let you all look at my nut.

 I have owned the car for 42 years now, an I am the second owner. I don't believe the nut has ever been away from the top and I know the top has not been away from me.

 What do you think of it, compared to the repros or do I have a 43 year old service nut, or original ?

 Jack

 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal001.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal002.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal007.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal005.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal012.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal013.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal014.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal018.jpg
 http://i633.photobucket.com/albums/uu57/jackfit87/Wing%20nut%20air%20cleaner/Wingnutoriginal022.jpg

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Timothy B.

December 28th, 2011, 11:04 AM

Jack,


 That looks like the real deal 219281 wingnut to me, it's the 1963 wignut that I question.

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David L.

December 28th, 2011, 06:33 PM

Jack,

 I would say that the wing nut in your photos is an original (GM # 219281) but the issue in this thread is whether or not the the chrome plated stamped steel 219281 wing nut was original equipment on the 1963 Corvette as the 1963 assembly manual lists GM # 117204 which is a chrome plated "forged" wing nut. The 1962 Corvettes AIM lists the 117204 wing nut as well.

 Dave

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 Bingo.