Topic: 1970 correct Dearborn door hinge bolts

[Bsbeck]

Morning everyone.  My question is concerning the correct bolts for door hinges on a 1970 Mercury Cougar Eliminator, Dearborn built on 10/2/69. 




I have TWO 70 Eliminators and one 70 convertible, all built at Dearborn and they all have the bolts seen above with the little triangle in the middle.  I've got one bolt that broke and I need to replace it.  All the reproductions I've seen have a dimple in the middle and not the triangle, as seen below...

I found some in my parts stash that came off of a 70 XR7 hardtop, that probably wasn't a Dearborn car...


Does anyone know if all Dearborn cars used the bolts with the triangle in the middle or if they are even reproduced?

[krelboyne]

All Cougars, built after the 4th week of November 1968, were built in Dearborn. So, most of the 1969's, and all 1970-73 Mercury Cougars were assembled in Dearborn, Michigan.
Several different headed hinge bolts were used in 1970. I think that we found 5 different hinge bolts or more, 1969-70.

[Bsbeck]

Scott Behncke,

           Is the bolt with the triangle shape reproduced or available?  All I've seen for sale are the ones with the dimple in the middle.

[jwc66k]

Is the bolt with the triangle shape reproduced or available?  All I've seen for sale are the ones with the dimple in the middle.

Do you have a Ford hardware part number? If you measure the bolt you have, diameter, thread pitch and length, you can use this forum's library to look up a hardware part number by size - topic "Hardware By Size/Dimension".
Jim

[krelboyne]

I have no idea. Those head markings are often times used in manufacturing as an internal identifier. Could be for a specific Lot or Run, or manufacturing location.

[ng8264723]

So some cars could have had a bunch of mixed bolts?

[krelboyne]

Doubtful.
From a manufacturing standpoint, you would not want to mix parts together from different machines. Traceability is everything.

[J_Speegle]

So some cars could have had a bunch of mixed bolts?

That would not be normal. There may have been very short periods with a new bin of hardware/bolts were brought to the line and the remained of the old container was dumped on top of the new stock. This may affect twenty cars of so in the transition


Here are some examples I found

0F17219x



And 0F5691xx

[specialed]

The bolt head markings were vendor ID.  R B W.   Rockford Bolt Washer. if i remember correctly.