Flatheads should only be used on thumbscrews just in case you need a little extra torque from a screwdriver.
The only other legitimate use I’ve seen for flatheads is on wooden boats, where you’ll be gooping the head up with tar for waterproofing. Since you’ll eventually have to scrape it back off again to get to the fastener, you want a simple geometry that’s easy to clean.
The only other legitimate use I’ve seen for flatheads is on wooden boats, where you’ll be gooping the head up with tar for waterproofing. Since you’ll eventually have to scrape it back off again to get to the fastener, you want a simple geometry that’s easy to clean.