metric bolts???

[wedgee]

After numerous trys replacing two set screws that I carelessly misplaced when I disassembled my car(68 roadrunner)...It was determined that they were in fact metric!!
as far as I can tell, these two fixtures had never been apart or even off of the car as I have owned the car since 1980...
can anyone guess what two I'm talking about??. I'm still in dis-beleave about this, would never have thunk it

 

[WileE]

Hold on, let me think ...........

 

[wedgee]

Right?!? the set screws holding the light assembly in the "bullet" turn signals.. they are original equipment.

 

[1 Wild R/T]

The only Mopar from that time frame with metric fasteners would be a Simca... You need to re-evaluate what you are looking at...

 

[33 IMP]

Stripped, and re-tapped?

 

[dadsbee]

Fluke that a 1.0 metric worked in a fine thread standard thread.

 

[1 Wild R/T]

Fluke that a 1.0 metric worked in a fine thread standard thread.

1.0 pitch would either be 6mm or fine thread 8mm
6mm is just under 1/4" 1/4" fine thread is 28TPI or .0357 between threads 1.0 is .0393
5/16 is .004 larger than 8mm 5/16 -24 is .04167 between threads...
Both are close but neither is gonna thread on very far...

 

[dadsbee]

1.0 pitch would either be 6mm or fine thread 8mm
6mm is just under 1/4" 1/4" fine thread is 28TPI or .0357 between threads 1.0 is .0393
5/16 is .004 larger than 8mm 5/16 -24 is .04167 between threads...
Both are close but neither is gonna thread on very far...

Point was it's a fluke they fit,. There are zero ORIGINAL metric fasteners on a '68.

 

[1 Wild R/T]

Point was it's a fluke they fit,. There are zero ORIGINAL metric fasteners on a '68.

Not when it left the factory...

 

[WileE]

View attachment 1759198 Hold on, let me think ...........

 

[wedgee]

IDK. dont like the thought myself. Im gonna double check them again again

 

[HawkRod]

I am OK with my old cars that use SAE hardware. I can deal with a car that uses all metric hardware. When it is mixed (like in a number of 90's era USA made vehicles) , it is a total PITA! Constant guessing between the two.

What bugs me is that now a number of reproduction or replacement pieces for our old cars are now coming with metric fasteners. WTF - why??? I have seen this is many cases. Lately on an alternator as well as ball joints for a 69. This forces a mix of metric and SAE fasteners that I despise.

 

[not so famous bob]

I am OK with my old cars that use SAE hardware. I can deal with a car that uses all metric hardware. When it is mixed (like in a number of 90's era USA made vehicles) , it is a total PITA! Constant guessing between the two.

What bugs me is that now a number of reproduction or replacement pieces for our old cars are now coming with metric fasteners. WTF - why??? I have seen this is many cases. Lately on an alternator as well as ball joints for a 69. This forces a mix of metric and SAE fasteners that I despise.

And , most hotrod parts are metric now , burns my *** , but all mixed on my 68 fastback now...

 

[Hey-O]

I am OK with my old cars that use SAE hardware. I can deal with a car that uses all metric hardware. When it is mixed (like in a number of 90's era USA made vehicles) , it is a total PITA! Constant guessing between the two.

What bugs me is that now a number of reproduction or replacement pieces for our old cars are now coming with metric fasteners. WTF - why??? I have seen this is many cases. Lately on an alternator as well as ball joints for a 69. This forces a mix of metric and SAE fasteners that I despise.

X2

 

[toolmanmike]

After numerous trys replacing two set screws that I carelessly misplaced when I disassembled my car(68 roadrunner)...It was determined that they were in fact metric!!
as far as I can tell, these two fixtures had never been apart or even off of the car as I have owned the car since 1980...
can anyone guess what two I'm talking about??. I'm still in dis-beleave about this, would never have thunk it

Nope!