"Robin S." wrote in message
...

"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


Thank you Robin, and Errol, for taking the time to find the info and reply.

I am still slightly confused (I might not have asked the right questions).
My situation is that I'm using a Hammond aluminum enclosure - dimensions
shown he
http://www.hammondmfg.com/pdf/1455L1601.pdf (150KB)
The #6 machine screws supplied (Phillips) to attach the 1.5mm thick face
panels actually sit proud of the panel.

I'm having some custom panels made up and wanted to get the screws to sit
flush with the panel. I've had a test panel made with 82deg countersink
angle (sorry, I found that I already had that info) and a maximum diameter
of 0.240". Now I have the panel back, the maximum diameter seems too big
with the screws in place - there is an easily gap around the edge of the
screwhead. I must have given you the wrong information, as the 0.307Ø is
more than the 0.240Ø that I've tried.

Many thanks for your help,

Jim