fillet radius

Note that the default fillet radius is given in parentheses.

As shown below, zoom into the fillet radius and plot and number the lines.

Attention was also focused on improved fillet radii to reduce stress concentration at the web junction with the head.

From the position menu choose the ENDENT option, and select three of the outer fillet radius lines close to the end by the fillets, for the three points required to define the circle.

For example, in Boeing Design Manual BDM-1327 section 3.5, the nominal diameter of the spot-faced surface is the same as the nominal size of the cutter, and is equal to the flat seat diameter plus twice the fillet radius.