"Jim" wrote in message
...
For a #6 countersunk machine screw could some one please tell me, or point
me somewhere I could find out:
a) The diameter of the screw-head
b) The angle of the countersink


Imperial countersunk screws (socket head) have an 82º head. A #6 should has
a .307Ø theoretical sharp head. If you were to measure one, it could be as
small as about .263 but your c-sink has to be .307Ø or the top of the screw
will lie above the top of the work surface.

Regards,

Robin