I'm trying to capture the shroud rotten of my sear nouns compressor-6 hp, 30 gal. container? The screws I have need of to remove are set in adjectives...

The screws I have need of to remove are set in adjectives (4") holes in the shroud. I can't recount what kind of head I'm dealing with. The parts sheet tell the size of the screws, #10-24x9/16 tub HD., but not what kind of manager. Can't see into the holes well adequate to tell what they are. HELP !!
When working near fluorescent lights that are flickering,...
Answers:    #2 phillips ( the majority of Pan principal machine screw are phillips.) Some are still slotted. You should be able to "feel" when you are within the hole. " no charge for the pun" Worst case bring a flashlight. Good Luck