本规范涵盖直径小于等于51 mm（2 in.）的模制皮碗，由耐高温橡胶制成，用于使用符合SAE J1703和SAE J1705规定要求的机动车制动液的液压驱动缸。本规范涵盖了在规定条件下对液压制动器皮碗进行的性能测试，不包括与橡胶化合物的化学成分、抗拉强度和伸长率有关的要求。 本规范不包括盘式制动器密封件。

These specifications cover molded cups 51 mm (2 in) in diameter and under, compounded from high temperature resistance rubber for use in hydraulic actuating cylinders employing motor vehicle brake fluid conforming to the requirements specified in SAE J1703 and SAE J1705.These specifications cover the performance tests of hydraulic brake cups under specified conditions and do not include requirements relating to chemical composition, tensile strength, and elongation of the rubber compound.Disc brake seals are not covered by this specification.