Reference: Abbott, Richard. Analysis and Design of Composite and Metallic Flight Vehicle Structures 3 Edition, 2019

The Allowable stress for bearing compression stress is the material bearing allowable stresses, F_bry at yield or limit level and F_bru at ultimate level.

There is also a failure mode caused by a failure of the material below the surface in a shearing mode.

In general, the peak compression bearing stress can be divided by 3 and compared with the material shear allowable stresses, F_sy at yield or limit level and F_su at ultimate level.