Part number
110630 Cam lock
Goes into a round hole, its arrow towards the cam bolt. Turned clockwise with a flat screwdriver, it grips the bolt’s head and pulls the joint tight: 12 for the side panels, 10 for the rails, 6 for the top and 4 in each drawer, plus one spare kind of hole.
Replacement packsShop link
Missing one? Ask the store or its customer service for spare part 110630, and name the product it is for.