usually the walls are to thin
Countersink and countersunk are the same meaning. Countersink is English word Countersunk is German word <><><><> Present tense, and past tense. "I need to counersink these screws." "These scews were countersunk" Countersink can also be a noun- name of the tool used for that purpose. "The screws were countersunk with a countersink."
A countersink bit.
A countersink is a tool that creates a groove and a hole that allows the screw to be easily screwed inside of the wood's surface, while the countersink only creates a hole to allow the screw to be easily screwed in. The crown of the screw is exposed on the surface if the countersink is used. If the counterbore is used, the screw is not exposed directly, as it is inside the groove that is made.
Glenn Odekirk,
I believe recess could be used.
Dont eat it
A countersink is a special type of hole which allows a screw or bolt to sit below the surface of the object which it is put into, allowing it to not stick out above the top of this material.
Almost any place that has drill bits should have a countersink bit. Drills a pilot hole and the tapered countersink in one step.
Countersink of chamfer (I think)
cobalt steel
A countersink is used to recess a countersunk wood screw into the surface of the wood. It is a conical shaped area at the surface end of a screw hole and made by a counter sink drill bit. Detailed descriptions and diagrams are at the web liknk below.
There is a need to put a countersink on sheet metal before you use a cutting tap. Even if the sheet metal is 089 thick, it is recommended for safety any amount of thickness.