This is the hex nut that you will need to connect your tail piece barb to any faucet shank.
Please note: We will be closed on Friday 29-Aug-25 until Tuesday 2-Sep-25. Shipping orders placed during this time will be shipped out on 2-Sep-25. For locals wanting supplies before the weekend, I can be available through the week up to Thursday evening. Feel free to reach out to me by email if you have any questions or would like to arrange an alternate time/date for pickup.