25th Edition of Machinery's Handbook, page 1494 shows the following:

Diameter of screw head: .279 max, .228 min.
Angle: 99 to 101 degree included

This for ANSI B18.6.3 - 1972 R1977 flat head machine screws



On Sun, 7 Mar 2004 16:31:09 -0000, "Jim" wrote:

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

Sorry if this is a very basic question - I couldn't find the answers by
Googling.

Thanks,

Jim

Errol Groff
Instructor, Machine Tool Department
H.H. Ellis Tech
613 Upper Maple Street
Danielson, CT 06239

860 774 8511 x1811

http://pages.cthome.net/errol.groff/

http://newenglandmodelengineeringsociety.org/