Size and thread type: -02 (1/8") NPT Female Rigid for -04 (1/4") Hydraulic Hose
Dash and Tube Size: -02 and 1/8" Industry Nominal Thread Size: 1/8-27 Actual Measurement of Male Thread OD: 13/32" or 0.41" Actual Measurement of Female Thread ID: 3/8" or 0.38"