Metric Clearance Hole Chart

We see a lot of different footprints and component types for PCB Assembly at Bittele Electronics A majority of through-hole part footprints are designed with

Slot is a flat and narrow hole It could be a hole where you can insert a coin or key Groove is a long cut It could have curves

slot machine telegram Slot hole perforations can have either round ends or square ends and are typically used for sieves

slot freebies This would specifically be called a 'counterbore slot' and is a fairly common detail which allows a slotted hole that can be used with a socket