Nitronic Inserts

Looking for the right comm code for NITRONIC Inserts. Usually comes under 7318 2900 Stainless steel inserts what we use at work but customs are saying they’ve got 004461217 which doesn’t show up anywhere? Am I right still using 7318 2900? The part number is 2TLC-01C/N. Please advise Thanks Mark.

004461217 may be the part number, which is not the commodity code.

7318.29 is for unthreaded parts, is this correct?