Those bolts actually have a flange about midway that prevent the stud from going too deep into the stand and to prevent the trunkside nut from exerting force on the stand. You probably won't find them, short of lucking up and getting a NOS piece from a dealer or in a parts yard.
I cut the head off of a standard hex bolt, and then glued in the "studs" with epoxy. I made the shank of the bolt rough (grinding wheel, Dremel, etc) so the epoxy could adhere better to the bolt.
On my spoiler stands, the plastic bosses around the studs were cracked, so even if I had brand-new Pontiac studs, they could not be torqued correctly. In my case, the epoxy also served to repair the cracked plastic.
The bolt that holds the side view mirrors to the door are nearly the same. Length is just a little different (spoiler version seemed longer). I found this out when I couldn't locate the missing one that allowed my driver's side mirror to rattle nonstop. I happened to have the spoiler stud laying around. Made it work!
The threads of the spoiler bolts are different on the end that goes into the spoiler. More like a wood screw or metal screw. The mirror studs are standard pitch threads, both ends.
Unless you already have some arrangement (such as a business account), McMaster doesn't sell to Canadian individuals.
Sales prevention at its finest... Because they won't sell to me as an individual, I hesitate to order from them at work (where we do have an account with them).
Thks i had found the one wood/machine but it was my plan b as it doesn't have the washer in the midle.
How we mesure the thread pitch Mc master get ton of model?
Thks
I just added my own washer
FYI... doing a search someone has a GM part number...
quote
Just to keep everyone updated, I just got back from the local Pontiac dealer. 20643712 is an obsolete part # that is no longer in the GM parts computer. The lady at the parts counter then called an 800# to some parts warehouse in Lansing, MI. It's an automated phone service where you punch in the old part number and the automated computer attendant tells you what the new part number is (wish I could have seen what the phone # was....it would probably come in MIGHTY handy sometimes). The computerized voice then said (she had it on speakerphone) that part number 11508509 is the current part # for the spoiler studs. She looked that number up and they came up as $0.63 each but you have to buy a pack of 10, so I placed an order for a pack ($6.30) which should be in on Thursday or Friday. I'm anxious to see what they look like, since the old studs were at least $3 a piece, which makes me wonder how "applicable" this new part number is considering they are like 80% cheaper. Might be something that "happens to work" but needs the "force to fit" method to use them.
"11508509 STUD , FLANGED,M7X1.59X16,M6X1X20,PHOSPHATE ELECTRO ORGANIC, 16 OUTSIDE DIAMETER(FRONT END PANEL)(PART OF 1)(REPAIR) "
[This message has been edited by jaskispyder (edited 09-23-2016).]
Fiero isn't the only GM car that had/has a spoiler. It may be that some of the other vehicles uses the same or similar stud to hold the spoilers onto the deck lid. Worth a lookie-see.
On my spoiler bolts, you can see there are two different sizes on them with one longer than the other:
In this picture the four on the top are the front bolts and the bottom one are the back side which are longer. The bolt on the right is a John Deere Carburetor mount bolt.
Let me know if you see the same thing as me, but I see the rear bolts are not in bad shape, but the smaller front ones are eaten up.. I have looked at only two sets which seem identical as to wear via rusting .
Here is what I have found:
This bolt is from a John Deere 115 carburetor mount bolt on the left and the rear Fiero bolt on the right. These two are too much different I think in that the longer one has many more threads than the JD one. Look in first picture above and you can see it is closer to the short bolts than the longer ones.
The collar on the JD bolt is not as big around as the Fiero one is, but not by much... Thickness is about the same I believe. The course threads might be a little shorter, but not much.
Would that be something to look into then? I am looking for the longer bolt, but so far mine have been in fairly good shape. I wire-wheeled mine and painted them over and look pretty nice now.
