Comparison : Item # 390-12-12-S/S, 3/4 Inch (in) Flange Size CD61 SAE J518 JIC Thread 90 Degree Flange
Item # 390-16-16-S/S, 1 Inch (in) Flange Size CD61 SAE J518 JIC Thread 90 Degree Flange
Item # 390-20-20-S/S, 1-1/4 Inch (in) Flange Size CD61 SAE J518 JIC Thread 90 Degree Flange
Item # 390-24-24-S/S, 1-1/2 Inch (in) Flange Size CD61 SAE J518 JIC Thread 90 Degree Flange
Item # 690-12-12-S/S, 3/4 Inch (in) Flange Size CD62 SAE J518 JIC Thread 90 Degree Flange