3903-02544 | 1/8" JIC female swivel fitting

Size and thread type: -02 (1/8") JIC female for -04 (1/4") Thermoplastic Hose (100R7 and 100R18)

Dash and Tube Size: -02 and 1/8" 
Industry Nominal Thread Size: 5/16-24 
Actual Measurement of Male Thread OD: 5/16" or 0.31" 
Actual Measurement of Female Thread ID: 9/32" or 0.27" 

This product will fit applications that included the following: Weatherhead 3903-02544