Comparison : Item # 300-8-8, 1.188 Inch (in) Dimension B, 1.940 Inch (in) Dimension C, and 3/4-16 Thread CD61 JIC Thread Split Flange Adapter
Item # 300-8-12, 1.500 Inch (in) Dimension B, 2.09 Inch (in) Dimension C, and 3/4-16 Thread CD61 JIC Thread Split Flange Adapter
Item # 300-12-12, 1.500 Inch (in) Dimension B, 1.890 Inch (in) Dimension C, and 1 1/16-12 Thread CD61 JIC Thread Split Flange Adapter
Item # 300-16-12, 1.500 Inch (in) Dimension B, 1.840 Inch (in) Dimension C, and 1 5/16-12 Thread CD61 JIC Thread Split Flange Adapter
Item # 300-12-16, 1.750 Inch (in) Dimension B, 1.940 Inch (in) Dimension C, and 1 1/16-12 Thread CD61 JIC Thread Split Flange Adapter