Screw Head and Drive Types
Common screw head and drive types, with photos of the screws SFP stocks. The red line beside each drawing shows how screw length is measured.
Head typesTYPES OF HEADS
┃ Under-head length: from under the head to the tip┃ Overall length: countersunk heads include the head
In stock at SFP (tap a card to shop that head type)
Other common head types (drawings)
Drive typesTYPES OF DRIVES
The drive decides which screwdriver or key you need.