The objective of this project is the calculation of dimensions, modeling, Assembly, and Static Structural analysis of the cotter joint. A theoretical method is used here to calculate the dimensions. The modeling and Assembly are done in Catia V5R20 and Static Structural analysis in Ansys 2020R1. While doing the static structural analysis more focus is given on generating the most efficient mesh and the comparison of results with respect to four different types of mesh is done. Here the parameters evaluated and compared are Equivalent (Von-Mises) Stress, Shear Stress, and Total Deformation. The analysis of the cotter joint is done for the tensile loading with one end kept as fixed support.