Hi everyone!

I'm getting an air dam for my 91 Camaro and it doesn't have an existing one and the screws are missing. I'm not hardware savvy so forgive my terminology but I need to know the thickness of the threaded part of the bolt as well as spacing in between the treads and the length of the threaded part. Also the size of the bolt head. I'll have to go to a hardware store to find them I guess. Nobody sells the screws with the replacement Air Dam lol.

 

As far as I can tell, they aren't listed in the parts catalog. Best educated guess, GM part number 11503412. That's a M6.3 x 20mm with a 24mm washer and 10mm hex head. GM used a bunch of ODD metric sizes for sheetmetal screws. That's because they're usually an english size, converted to metric. M6.3 translates roughly to 1/4".

 

Awesome! Thank you Drew, I will give that a shot.

 

Did these workout for you?

 

I thought they were M8 x 1.25 with a 10mm head that went into the spring-y U clip sheet metal fasteners.

 

Mine were like this.

If you have any junkyards around honestly thats where i get extra bolts. I'll pay the $2.00 entrance fee and then find the bolts i need, interior bolts, exterior clips or just any specific bolt i need and let them know. Everytime the guys just let me walk out, once i had a new employee charge me $1.75 for 'accessories'.

Either way worth it.