Topic: Fender bolts

[KIWIASH]

Looking for some guidance please on factory fender bolts.
My '70 Boss has a mix of bolts as shown, which I think could be original as I don't believe the fenders have ever been removed.
Is it possible that these bolts could have installed from the factory?
Many thanks
Ash

[J_Speegle]

Yes there can and we have documented where one suppliers (lets call it the first one) bolts get mixed in the supply bin or on a car with the second suppliers. Of course this would not typically lead to three versions on the same car on the same part.

Of course what bolts were available depends on where the car was built (often different suppliers for different plant) and when the car was built.  I'm guessing it was built at Dearborn

So as a place to start when and where was your car built?

Might want to consider including this information and some other helpful details as your signature that way it is automatically included every time you post or ask for help 

BTW the pictures of the head markings really are not clear - at least for me in your pictures want to make another try at that or describe the head markings for us. Looks like possibly flags and PSC head markings

[KIWIASH]

Thank you Jeff.
Yes, my car was build at Dearborn. I will try and get some clearer photo's. 

[jwc66k]

According to the "1970 Mustang Body Assembly Manual" (AM0031), page 18, the 12 bolts used for the fenders to the fender apron are 59039-S39. As far as I know, it is not reproduced. In judging, the correct bolt is mandatory. It's not what you've always had there, it's not what was replaced at the dealer, it should be the original type.
See attached for a drawing with measurements and a photograph of the bolt.
Note: The bolt is measured by "thread length". That's from under the head, the washer thickness is not included, to the end of the threaded shaft, excluding the lead point.
Note: The finish, -S39, is cadmium plating. The cadmium plating process is highly toxic and restricted for use in most parts of the country. If is allowed, it will be expensive. If you choose to have your hardware "reconditioned", I recommend using dull zinc plating as a substitute.
In this forum's library, you will find a topic "Mustang Hardware Spreadsheet 69-70". It has two files, one by hardware part's location, -AP06, and as second by the hardware's part number, -PN06 (the 06 is the revision).
It is mostly based on the Mustang Assembly Manuals. I suggest you invest in a set for your car.
Jim