This International Standard specifies the main dimensions and tolerances, in millimetres, of sprue bushes that are used mainly in injection moulds for plastics and rubbers (an application example is shown in Figure1). It also specifies the hardness and designation of sprue bushes conforming to this International Standard. Figure1 Application example of sprue bushes Key 1 ejector pin (ISO6751) 2 sprue puller (ISO16915) 3 locating ring (ISO10907-1) 4 sprue bush (ISO10072) 5 dowel pin (ISO8734)