第二版取消并取代第一版（1984年）。指定一系列连接器单元的要求。每个单元由以下部件组成:钩环式连接器、连接器螺栓、连接器螺母。它没有说明完整的设计，但它提供了足够的细节，以确保符合ISO 610的链条和符合ISO 5612的刮刀杆的尺寸兼容性。

This second edition cancels and replaces the first edition (1984). Specifies the requirements for a range of connector units. Each unit consists of the following components: shackle type connector, connector bolt, connector nut. It does not indicate a complete design, but it gives sufficient detail to ensure dimensional compatibility with chains complying with ISO 610 and scraper bars complying with ISO 5612.