The correlations of the reduced hindrance factor F of the K-isomers in Ta and Hf isotopes with respect to (the product of valence nucleons), (the isomer excitation energy referred to a rigid rotor), and (the energy difference between the same configuration at and (middle of a shell), at given spin and isotopic chain) have been re-examined. The analysis is performed in the valence regions divided into particle–particle (p - p), particle–hole (p - h), and hole–hole (h - h) regions, based on the phenomenology. The Ta and Hf isotopes are considered, given the availability of the same spin configuration in the different sectors of the valence regions. In our study, we observe that the parameter shows a significant correlation with F within an isotopic chain.