Comparison : Item # 304-12-12, 1.500 Inch (in) Dimension B, 2.080 Inch (in) Dimension C, and 1 3/16-12 Thread CD61 ORFS Thread Split Flange Adapter
Item # 304-16-12, 1.500 Inch (in) Dimension B, 2.060 Inch (in) Dimension C, and 1 7/16-12 Thread CD61 ORFS Thread Split Flange Adapter
Item # 304-12-16, 1.750 Inch (in) Dimension B, 2.13 Inch (in) Dimension C, and 1 3/16-12 Thread CD61 ORFS Thread Split Flange Adapter
Item # 304-16-16, 1.750 Inch (in) Dimension B, 2.110 Inch (in) Dimension C, and 1 7/16-12 Thread CD61 ORFS Thread Split Flange Adapter
Item # 304-20-16, 1.750 Inch (in) Dimension B, 2.110 Inch (in) Dimension C, and 1 11/16-12 Thread CD61 ORFS Thread Split Flange Adapter