Countersink

Countersink holes are special holes that are used to countersink screw heads in order to create a flat surface. They allow screws to be positioned level with the material to achieve a smooth finish.

Through-hole plating is also possible for countersunk holes (see picture below).

Countersink holes can
be realized in 2 variants:

TYPE A for countersunk head screws
(with 90° countersink as standard)
TYPE B for standard screws

Property		Definition
D	PCBauch: gedruckte Schaltung, engl.: PCB - Printed circuit boar... More thickness
d1	Drill diameter through LP	Screw thread +0,2mm
d2	max. Screw head diameter
t1	sink depth
	Attention: For type A, the two properties d2 and t1 influence each other