In some offshore implementations, such as the foundation structures for offshore wind turbines, pile foundations are crucial to withstand enormous lateral loads in combination with the imposed vertical reactions. Due to the low soil strength and stress level near to the seabed, the lateral reaction is weak and compliant close to the pile head. Enlarging the pile close to the pile head and adding fins can boost the lateral bearing capacity. With the extra benefit of providing a reduction in necessary pile length, this cross-sectional expansion improves the overall resistance from the soil. The goal of this inquiry is to showcase the shaft pile technique with fins installed in dry sand. This study examines the observed behaviour of forty-five model experimental test results from combined torsional and lateral capabilities of shaft piles installed in dry sand with and without expansion at the pile head. The impact of these fins, which are positioned at the top of the shaft and have varying widths, was examined. The test results demonstrated that enhancing the fin efficiency of combined torsional and lateral fin pile capabilities required raising both the fin width/pile diameter ratio (Wf/Dp) and sand relative density. At application points of arm length/pile diameter ratio, (E/Dp), of (1.9, 3.8, and 7.6) correspondingly, it was discovered that the fin efficiency, ηT values were around (7.2, 7.52, and 7.62) times the case of conventional pile without fins for dense sand condition. The increase in section modulus is due to the presence of fins which act as a reinforcement to the shaft. The fins enhance the surface area of the shaft, which boosts how the soil, pile, and fins interact with one another. Another advantage of augmenting the fin width of a shaft is that it ameliorates the frictional resistance of the shaft. This is so that the bigger surface area of the shaft creates a greater contact area for the sand strata, resulting in increased friction. This increased frictional resistance helps to restrain the pile from lateral movement, resulting in greater stability. This contributes to an enhancement in the combined torsional and lateral capacities of fin piles. However, the lateral resistance is appreciably diminished in the shafts during the simultaneous employing of torsional and lateral load, as limiting angular rotation is reached before limiting lateral displacement. Reduction in lateral resistance continues linearly with an increase the application point of arm length/pile diameter ratio, (E/Dp). Therefore, this investigation recommends that reduced lateral load resistance be utilized during foundation design.