This part of ISO 9448 specifies the main dimensions and tolerances, in millimetres, of guide bushes of form G, stepped gliding bushes, type 1, intended for use in press tools and to be mounted in the clamp plate with interference fit over a certain length. The remaining portion of the length ensures the guiding. The bushes are provided with a clearance for lubrication.It gives guidance on the materials, and specifies the hardness and the designation of bushes in accordance with this part of ISO 9448.