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Diameter at
Bottom of Thread.
Sharp V of 60° angle
Flats of O or
(1.73205 pitch of thread).
"Sellers" or .75 depth of thread = Diameter bolt less (1.2990375 X pitch of thread).
Corners of O nuts
nuts 1.5 diameter of bolt + .125".
= 1.155 flats,
Diameter bolt less