C3 Corvette: Rear Panel Lettering Fastener

[Ray K.]

Does anybody "by chance" have a picture or pictures of the fastener(s) that were used on the C3s to hold the individual Corvette letters onto the rear panel? AIM part number shows GM #9420202 of which I can't find any info on anywhere.
Here's a few pictures of that I have on a vette that we're working on. We don't believe that these are correct, but as in the past, I/we have be wrong. Any insight would be greatly appreciated. Thanks.
Ray K (#43777)

Rear Lettering Fasteners_2 - 23Mar20.jpgRear Lettering Fasteners_1 - 23Mar20.jpg

[Mike E.]

Re: C3 Corvette: Rear Panel Lettering Fastener

Identifying the year would be helpful, since there were many variations 68-82. It looks to me like that is somewhere between a 68 and 73, and if that is the case, those are original.

[Ray K.]

Re: C3 Corvette: Rear Panel Lettering Fastener

Sorry, my bad . . . it's a '72

[Dick W.]

Re: C3 Corvette: Rear Panel Lettering Fastener

They are a thread cutting acorn nut. Mostly used in older automotive applications. Looked at the catalogs of the suppliers that I used when I sold parts and they no longer carry them. Fastenal, Auveco, nor McMaster Carr list them in their catalogs

[David B.]

Re: C3 Corvette: Rear Panel Lettering Fastener

9420202 is a stamped nut - self threading Acorn type Phosphate coated GM 6001-M code B. 1/8 type SCW (self threading sealer style)

[Patrick H.]

Re: C3 Corvette: Rear Panel Lettering Fastener

I've re-phosphate these before and reinstalled them to look like new.

[Ray K.]

Re: C3 Corvette: Rear Panel Lettering Fastener

All,
Thanks for your replies . . . . .

However, when I continued my "online" part number search, I happen to come across the attached GM reference showing that part number 9420202 "apparently" was a 1/8" - 7/16" phosphate coated hex pal nut . . . . very interesting "finding and observation."

Wondering if this could this be another part that GM didn't change the part number when the actual part changed? Since this isn't identified in the latest technical and judging manual, it would be interesting to see applications of both (model years with VINs) . . . .

Ray K
Nut - Corvette Rear Panel Lettering #9420202 - 25Mar20.jpg

[Mike E.]

Re: C3 Corvette: Rear Panel Lettering Fastener

All,
Thanks for your replies . . . . .

However, when I continued my "online" part number search, I happen to come across the attached GM reference showing that part number 9420202 "apparently" was a 1/8" - 7/16" phosphate coated hex pal nut . . . . very interesting "finding and observation."

Wondering if this could this be another part that GM didn't change the part number when the actual part changed? Since this isn't identified in the latest technical and judging manual, it would be interesting to see applications of both (model years with VINs) . . . .

Ray K
[ATTACH=CONFIG]97424[/ATTACH]

That seems consistent with the replies from everyone above. I'm not understanding your reference to the actual part changing, but that is probably just me.

[Dick W.]

Re: C3 Corvette: Rear Panel Lettering Fastener

All,
Thanks for your replies . . . . .

However, when I continued my "online" part number search, I happen to come across the attached GM reference showing that part number 9420202 "apparently" was a 1/8" - 7/16" phosphate coated hex pal nut . . . . very interesting "finding and observation."

Wondering if this could this be another part that GM didn't change the part number when the actual part changed? Since this isn't identified in the latest technical and judging manual, it would be interesting to see applications of both (model years with VINs) . . . .

Ray K
[ATTACH=CONFIG]97424[/ATTACH]

Either will work for most applications

[Ray K.]

Re: C3 Corvette: Rear Panel Lettering Fastener

Mike,
Back in the day and if the part changed without affecting the assembly of the part(s) in the plant, GM didn't change the part number
Ray