ABSTRACT
F = USS·AS (1)
where
USS =ultimate shear stress of the nut or bolt materials (psi, MPa) AS= cross-sectional area through which the shear occurs (in.2, mm2) (This is not the
cross-sectional area of the body, as we shall see in a minute.)
As mentioned earlier, thread failure will occur in either the nut or bolt threads, or in both simultaneously, depending on their relative strengths. A different expression must be used to compute the shear stress area for each type of failure.
