BS 4742-7:1989 Hydraulic equipment for agricultural machinery - Specification for port connections for agricultural trailed vehicle hydraulic brake couplings
BS 4742‑7:1989 defines the dimensions and performance requirements for the port connections used in hydraulic brake couplings on agricultural trailed vehicles, in conformance with BS 4742‑4:1985
BS 4742-7:1989 Hydraulic equipment for agricultural machinery - Specification for port connections for agricultural trailed vehicle hydraulic brake couplings