"Peter H." wrote in message
...


... it could be 82 and 90 degrees, or it could be some other number ...


Countersinks are made in 60, 82 and 90 degrees.

Machine screws are 82 degrees.

Specialty screws could be 90 degrees.


Thanks for the info. Sorry - I didn't check the diagram closely enough; in
fact it does state the countersink is 82 degrees. My confusion was caused by
the #6 thread with #4 head.

Jim