3/8" FNPT H style couplers are used in larger tool applications requiring more SCFMs. Has a maximum pressure of 300 PSI and a basic flow size of 3/8". Air flow of 67 SCFM. Complete with a Buna-N seal.
The H-style from Milton is equal to the commonly known "Industrial" style hose fittings. Please note that 1835 uses a 3/8" style body size which is larger than the standard 1/4" couplers