This is the replacement seal for hardline fittings and go between part #54 and #58. (see diagram)
Due to slight tolerance variances in the plating process, your fitting may require 2 orings. It is recommended to order them in sets of 2. If you are changing them on two fittings, you should order 4 orings total.
104 x N70 Buna
1 Page Phantom Parts List 2019.pdf