weather strip channel and drip rails screws

[GoMangoBoys]

What are the proper screws for attaching the weatherstrip channels and the drip rail mouldings?  I did not look closely yet, but I am guessing #8 sheet metal screws???

[headejm]

The screws are different for each but neither are #8 sheet metal screws. The drip rail screws are sort of flat headed (the head has a flat crown). The weatherstrip channel screws have a built in washer. Both kinds of screws are fairly short (1/4"?). Here are the best pictures i could find.