ISO-A 1" NPT hydraulic quick coupler socket. ISO-A type hydraulic quick-connector with socket and 1" NPT female thread. It is designed to allow quick and clean disconnection and connection of hydraulic systems, and to protect them from the ingress of contaminants, which could cause damage or malfunction. Parameters: Standard: ISO-A Thread: internal 1" NPT B: 100 mm D: 56 mm CH: 41 mm