Bolted joint assembly is commenly used in various design problems. An optimized joint design is best suitable for one set of design parameters.This paper is concerned with the bolted joint assembly subject to a turnover load. The objective is mainly to approach as closely as possible to some appropriate mathematical analysis to the most important design parameters. These parameters are; turn-over load, quality, geometry and dimensions of the two mating surfaces. Several assumpations have been taken into consideration to simplify the proposed mathematical model. Calculation of the joint stiffness and some basic optimum values would then be with-in the reach of designer in a minimum time and less effort.