The fine structure parameters of five 1snf configuration of the helium atom, the intermediate coupling wave functions, and the gyromagnetic ratios are calculated in the single-configuration approximation. Virtually zero residuals between the calculated and experimental values of energies are obtained. For two configurations, 1s4f and 1s5f, the fields of Zeeman sublevel crossing for magnetic fields from 0 to 700 Oe and the regions of anticrossings are found.