Establishes the preferred range of nominal dimensions and associated tolerances for a series of housings as follows: for cylinders of 16 to 500 mm; for rods of 6 to 360 mm. For the compact series of ISO 6020-2 the ranges of dimensions are as follows: for cylinders of 25 to 200 mm; for rods of 12 to 140 mm. Does not give details of seal design. Applies to the dimensional criteria of products; does not apply to their functional characteristics.