04U-506 | MJ-04-06 | 3/8" JIC male fitting

Size and thread type: -06 (3/8") JIC male for -04 (1/4") Hydraulic Hose 

Dash and Tube Size: -06 and 3/8"
Industry Nominal Thread Size: 9/16-18
Actual Measurement of Male Thread OD: 9/16" or 0.56"
Actual Measurement of Female Thread ID: 17/32" or 0.51"

This product will fit applications that included the following: Weatherhead 04U-506