Cable protection plug for 450i and 550

Hi , i wanna know the correct screwing cable protection that fit on the ethernet port of the 450i and 550 because we don't have one on hand and i have to connect the aux port. The size and the type thank you

metal protection cap

If memory serves me correctly, this should be the correct size

N000065L033A is the part number for the glands. Be advised they come in packs of 10. This is specific to the 450.