Air Cleaner Wing Nut

[Wayne M.]

Re: Air Cleaner Wing Nut

Check out this wing nut. Asking $80.00.

http://www.ebay.com/itm/1963-1964-19...item5ae40264ba

eBay item does not look good, IMO. On a similar post a few years ago, I submitted pics of mine, currently on my '65. Can't vouch for it's authenticity, but was part of a complete manifold, carb, air cleaner off a '64 that I bought at Pomona about 1981.

Believe that the stress / machining marks around the wings are one good identifier.






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[David L.]

Re: Air Cleaner Wing Nut

David

Thank you for your input do you know when the 9418699 was introduced?

Paul 18046

As I mentioned in my previous post the 9418699 wing nut (not chromed) replaced the 148312 wing nut theoretically on 2/12/63 (not 2/12/32, typing error) according to the 1963 Chevrolet Assembly Manual, Sect. 6, sheet B5.00. It's any ones guess as to when the actual change took place on the 1963 assembly line (maybe March, April, or May 1963). Unfortunately I did not write any information down other then "1963 Chev." when I removed the wing nut (believed to be GM # 148312) from the 1963 Chevrolet way back when.

Dave

[David L.]

Re: Air Cleaner Wing Nut

David,

My 1963 AIM calls out the #117204 for the air cleaner wing nut. Is this chromed and stamped like in your pics or a different style?

If it's different is the 63 AIM using a page from the passenger car model.

My guess is that the 117204 wing nut used on the 1962 & 1963 Corvette is the chromed version of the 148312 wing nut used on "early" 1963 Chevrolet passenger cars and probably 1962 and earlier models as well.

The 1964 Corvette AIM lists GM # 219281 as the air cleaner wing nut. There was nothing in the revision box about the wing nut.

Dave

[David L.]

Re: Air Cleaner Wing Nut

Wayne,

I agree with you. The wings look a bit smaller and there are no visible stress marks.

Is the steel thickness on your chrome wing nut 0.06" to 0.07"?

Dave

[Ronald L.]

Re: Air Cleaner Wing Nut

Lot's of subtle differences in these due to the fact GM had so many out there, would be nice to see the print to flush out all those with the mickey mouse ears - were they real or not at that time.

[Patrick H.]

Re: Air Cleaner Wing Nut

Lot's of subtle differences in these due to the fact GM had so many out there, would be nice to see the print to flush out all those with the mickey mouse ears - were they real or not at that time.

One thing to note - there are cases where the blueprints and the production line drawings don't match. I found that out when doing my radiator cap research several years ago. So, I would not be surprised if there were variations and nuances through the years on the actual parts no matter what the drawings show.

[Wayne M.]

Re: Air Cleaner Wing Nut

Wayne,

I agree with you. The wings look a bit smaller and there are no visible stress marks. Is the steel thickness on your chrome wing nut 0.06" to 0.07"? ....

Dave -- I get 0.058" thru 0.065" at 4 or 5 locations (hard to find a spot that's not on a curve).

[Paul O.]

Re: Air Cleaner Wing Nut

One thing to note - there are cases where the blueprints and the production line drawings don't match. I found that out when doing my radiator cap research several years ago. So, I would not be surprised if there were variations and nuances through the years on the actual parts no matter what the drawings show.

Patrick

My thoughts exactly these wing nuts were probably over the years made by several manufactures. With that there would slight variations to them but as long as they met the spec. set by GM or Chevy's engineering they were usable.

Paul 18046

[Paul O.]

Re: Air Cleaner Wing Nut

David and Wayne

Thank for your valuable input to the discussion.

Paul 18046

[Ronald L.]

Re: Air Cleaner Wing Nut

The dies to make these are really expensive. One does not make the changes seen here by changing suppliers or allowing variation in the print.

I have seen the tolerance call outs on many prints from "the era" that many think GM only shipped out of spec parts and the really bad ones to service, of course that includes all the one-off special cars that are the only ones to survive.

What is more a probable answer to the differences after 45 - 55 years is that GM had many divisions and groups doing their own thing, releasing their own parts.

So the Corvette group released a wing nut, Buick released a wing nut, the full size Chevy group released a wing nut, and they all look very similar until you look at the prints and die development drawings where you will find the secret to why these are different.

Also take note, I think it was Dave suggesting the Chevy 62 era wing nut was looking really like the other - to me they are very very different.

Completely different designs and tools.

GDT came into play in the late 60's and there we see redrawn and redesigned all the time.

[Timothy B.]

Re: Air Cleaner Wing Nut

David,

If you look in the Paragon book the 117204 wing nut is called out as used until 1962 and it's a forged wing nut. Could this have been used on 1963??

[David L.]

Re: Air Cleaner Wing Nut

David,

If you look in the Paragon book the 117204 wing nut is called out as used until 1962 and it's a forged wing nut. Could this have been used on 1963??

If the 117204 wing nut is the "forged" type as shown by the Paragon Corvette reproduction (Paragon part # 615) then obviously I am wrong in my previous posts about the 117204 and 148312 wing nuts. Isn't this the reason we have the Technical Discussion. I avoid reproduction parts like the plague but the Paragon reproduction parts that I have seen over the years are generally quite good. I just wonder why they do not list their reproduction 117204 wing nut for the 1963 Corvette as well. The 117204 wing nut is listed in the 1962 and 1963 Corvette AIM.

Dave

[Timothy B.]

Re: Air Cleaner Wing Nut

Dave,

I agree with you completely about the reproduction parts. Is it possible the 1963 used a forged wing nut.

If you google 117204 wing nut the post make reference to a wingnut like Paragons part.

[David L.]

Re: Air Cleaner Wing Nut

Dave,

I agree with you completely about the reproduction parts. Is it possible the 1963 used a forged wing nut.

If you google 117204 wing nut the post make reference to a wingnut like Paragons part.

AMK Products makes a reproduction 219281 wing nut (AMK # B-10008) as well as a reproduction 148312 wing nut (AMK # B-11520). Both are stamped steel. Apparently they do not make a reproduction 117204 wing nut. See link below.

Dave

http://www.amkproducts.com/Catalog_PDF/56-73.pdf

[Timothy B.]

Re: Air Cleaner Wing Nut

David,

Thanks for that link, I guess that's where all the repro houses get there fasteners.

Next week I will call them to find out if they have a blueprint of the 117204 wing nut and post the findings.

I also have what I believe is the original wing nut off my 67, part #219281 and I will post some close up pics and get some measurments.