what size are these bolts
 

Hello all,

This is my first post. I just bought a 2004 E150XL with 82,000 miles on it. Given it's age, it's in great shape, but it's got a few zits. Some zipper head neglected to put the bolts that hold the air cleaner in place back in. There are four holes where they are supposed to go, two are located right under the front edge of the hood and two are further back by the windshield. Can anyone tell me what size these should be so I can get replacements? Thanks for any help you can give.