Hex head hinge bolt dimensions...
 

Providing for a few guy that were asking for some measurements on the cowl vent hinge bolts.

First is the length and that is just a 1/4 thread , 2nd is that first shoulder width and the 3rd is that last shoulder width before the threads start.

Hope these help. Scott

Re: Hex head hinge bolt dimensions...
 

Those bolts look like hood bolts.
Bruce

Re: Hex head hinge bolt dimensions...
 

Yup, better known as shoulder-shank screws. DD

Re: Hex head hinge bolt dimensions...
 

That were probably used in many ways and many vehicles. They were not in my hood and could not be used as such, 39 Pick-up. I have the pictured 1/4-28 x 3/8" safety wire bolts that secure my hood to my hinge (4) four total. That raised area below the bolt is were the hood hinge slides over like that shoulder-shank screw would.

The shoulder-shank screw, two that I took out of the upper cab support to cowl vent hinge are what was in my truck. This is interesting to find were a lot of this hardware might show up.

I will send an e-mail to the Fordbolts king, Roy Nacewicz and get some clarification of this and those two "potato" chip washers in my other related thread. Thanks for the input. Scott