Knurl diam. charger -68 ??

[Charger1968R/T]

I want to get extended lug bolts for -68 Charger 440 R/T front and rear, ( original 4piston Bendix discbrakes in front and drum rear), due to the rim offset. I have checked around for extended bolts, but cant exactly find out what knurl diameter I have. I have already got several options.

Thanks !

[areibel]

Do you mean the thread on the wheel studs?  It's 1/2 inch, 20 threads per inch.  But are you aware that half are right hand thread (or standard) and the others are left hand thread- the opposite?  Unless your car has been converted to all right hand you'll need 10 of each.

[tan top]

 sorry if  this might sound silly  , but cant you take your original stud out & mesure the diameter of the splined/ knurled part  ?   

[Charger1968R/T]

No, I dont mean the threads, it is like tan top said, it is the "splined" part that is in the hub.

tan top, yes, it is no problem to take out a stud, but I was hoping that someone had the answer straight up.

Thanks