ISO 9449:2007规定了定心套筒的尺寸和公差，以毫米为单位，用于相对于模具中的固定夹板定位间隔块。ISO 9449:2006给出了有关材料和硬度的说明，并规定了符合本文件要求的定心套筒的名称。

ISO 9449:2007 specifies the dimensions and tolerances, in millimetres, for centring sleeves intended to be used for locating the spacing blocks in relation to the fixed clamp plates in moulds. ISO 9449:2006 gives indications concerning materials and hardness, and specifies the designation of centring sleeves which meet the requirements of this document.