ISO 3601-5:2015包含了一般工业应用中使用的O型环的一系列标准弹性体材料（橡胶）的材料规范。它还表明了材料满足与流体动力部件相关的许多要求的能力。 仅规定了通用材料；其他化合物也可以使用。 所需的物理性能和试验方法（包括试样）应由设备制造商/用户和O形圈制造商/供应商商定。

ISO 3601-5:2015 contains the material specification of a selection of standard elastomeric materials (rubber) for O-rings used in general industrial applications. It also indicates the ability of the materials to satisfy many of the requirements associated with fluid power components. Only materials which are in universal usage are specified; other compounds are available and can be used. The required physical properties and test methods (including test specimen) should be agreed upon between equipment manufacturer/user and O-ring manufacturer/supplier.