#8-32 silicon bronze machine screws with round head and slotted or straight slot drive. The Round Head has a semi-elliptical top surface with a flat bearing surface underneath. The flat bearing surface allows for lateral movement (as opposed to a Flat or Oval Head that have a countersunk bearing surface that will self-center in the mounting holes) when attaching hardware.

Generally chosen for it's traditional appearance. Silicon bronze offers great corrosion resistance, and along with the slot drive provides the classic look of traditional boatbuilding.