This part of ISO 9183 specifies the basic dimensions and tolerances in millimetres of wear for press dies, type A, intended for use mainly in large press dies. It also specifies the size and positions of the clearance holes for attachment. It gives material indications, and specifies the designation of wear plates for press dies, type A, which meet the requirements of this part of ISO 9183. Two thicknesses of this type of wear plate are specified: type A1, with a thickness, t, of 20 mm, and type A2, with a thickness, t, of 12 mm.