Comparison : Item # 2603-04, 1/4 Inch (in) T1 (UNF), 1/4 Inch (in) T2 (UNF), and 1/4 Inch (in) T3 (UNF) Carbon Steel JIC Male Adapter Union
Item # 2603-05, 5/16 Inch (in) T1 (UNF), 5/16 Inch (in) T2 (UNF), and 5/16 Inch (in) T3 (UNF) Carbon Steel JIC Male Adapter Union
Item # 2603-06, 3/8 Inch (in) T1 (UNF), 3/8 Inch (in) T2 (UNF), and 3/8 Inch (in) T3 (UNF) Carbon Steel JIC Male Adapter Union
Item # 2603-08, 1/2 Inch (in) T1 (UNF), 1/2 Inch (in) T2 (UNF), and 1/2 Inch (in) T3 (UNF) Carbon Steel JIC Male Adapter Union
Item # 2603-10, 5/8 Inch (in) T1 (UNF), 5/8 Inch (in) T2 (UNF), and 5/8 Inch (in) T3 (UNF) Carbon Steel JIC Male Adapter Union