Why when using the "equipitem" command on NPC, the item added to inventory and then used?

[orangedeal]

Is it possible to make use of an item (for example, steampak) only if it's already present in the NPC's inventory?

[steve40]

You are probably using the ID of the base item instead of the item in the inventory.

[orangedeal]

But can a steampak have a different ID? In the editor I see 23736 and in the inventory (showinventory command) of the NPC I see the same number.