Din 7160 Tolerance Link -
) for various shaft tolerance zones. These values are used to determine the exact upper and lower limits of a shaft's diameter based on the desired fit (clearance, transition, or interference). Clearance Fits: e8, f7, g6, h6, h7, h8, h9. Transition Fits: j6, js7, k6, n6. Interference Fits: p6, r6, s6, u8. Example Tolerance Values (h6 Shaft) DIN 7160 - 1965-08
Since a dedicated article on DIN 7160 alone is rare, here are the best resources that explain it thoroughly within its modern context: din 7160 tolerance