指定影响弹簧离合器和配合零件的离合器壳体之间互换性的标称尺寸和公差。所有其他尺寸和公差由部件制造商自行决定。不适用于飞机和乘用车的发动机；它可用于没有特定国际标准的其他发动机应用。建议商用车和客车使用表1中尺寸代码为1至4的离合器壳体。

Specifies the nominal dimensions and tolerances which affect the interchangeability between clutch housings for spring-loaded clutches and mating parts. All other dimensions and tolerances are left to the discretion of the component manufacturer. Does not apply to engines for aircraft and passenger cars; it may be used for other engine applications where no specific International Standard exists. Clutch housings of size codes 1 to 4 in table 1 are recommended for commercial vehicles and buses.