Stud Hole Details

Spigot Mounted

Although the edges of the holes will be very slightly chamfered to eliminate the sharpness, this does not constitute a countersink

Conical Countersinks

Conical countersinks (60°, 80° or 90°)

A° = c/sink angle d = hole diameter D = open diameter

Spherical Countersinks

Spherical countersinks (R14,R16,R18,R22)

R = c/sink radius d = hole diameter D = open diameter