Assembly note · Published February 11, 2026 · Updated October 2, 2026
Read the sheet before the first bolt.
An assembly drawing is a parts list plus a sequence. The sequence is the part people skip. Panels go together square, then fasteners get their final turns. The other way around twists a cam lock and strips a hole you cannot un-strip.
Names you will see on a hardware card
Makers use different drawings. These are the usual jobs of the parts, not a license to mix bags between brands.
Cam lock
A round barrel. A screw head enters from the side panel. The lock turns, often about a half turn, and pulls the panels together. The mark on the lock shows the locked position on that drawing. Another brand’s arrow can mean something else. Read the picture in your box.
Dowel
A wood or metal pin that locates two panels. It lines them up. It is not the part that does the pulling. If the drawing shows both a dowel and a lock, you need both.
Confirmat-style screw
A thick screw used in particle board. It needs the hole the sheet shows. A random wood screw from a jar is a poor swap in a joint that holds the case together.
Barrel nut
A cross-dowel that a bolt threads into. The slot has to face the bolt. If the slot faces the wrong way, the bolt spins and the joint never closes.
Shelf pin
Carries a shelf. It does not square the carcase. Put shelves in after the case is together, unless the drawing says a shelf is part of the structure.
Anchor kit
Often a separate bag with a strap or a bracket. On many tall units it is part of assembly, not a spare. The anchoring note is about the wall. The drawing is about which hole on the piece.
Before step one
Clear a floor larger than the finished piece. A blanket or the carton cardboard saves a floor and gives you a place to sort hardware. Sort by the letters or numbers on the bag, and keep the bags until the piece is done. Open the manual to the parts picture and count. Count panels, then hardware. A missing cam lock found now is a phone call. A missing cam lock found at step nine is a half-built case on the rug.
Read the whole sheet once, including the last page. The last page is often where the anchor, the tipping warning, or the “do not use a power driver” line is hiding.
Orientation is a drawing, not a guess
Finished faces, holes for hinges, and arrows that say “this side up” are doing work. A panel turned inside out will sometimes bolt together and then refuse the next part. If a hole does not meet the part the drawing shows, stop and rotate the panel. Forcing it enlarges the hole.
Square, then tighten
Fit the joints so the case sits flat. A diagonal check is simple: the two diagonals of a rectangle should match. If they do not, the case is a parallelogram and the drawers will tell you later. Snug the locks, check the diagonals, then make the final turns. Where the sheet says hand-tighten, a driver on a high clutch will snap a cam or strip particle board. The sheet is allowed to be more cautious than your drill.
Two people, when the drawing says so
A wide back panel, a glass top, or a long rail is a two-person hold. One person can start it and then watch a corner hit the floor. If you are alone and the step shows two figures, wait. That is a planning problem, not a character test.
Missing parts
Stop. Do not replace a structural fastener with a close-looking screw from another product. Contact the seller or the maker using the process on their paperwork, and keep the rest of the hardware in the labeled bags. A substitute bolt that is a few millimeters longer can punch through a finished face. A shorter one can hold for a week and then let go.
Shelf pins, caps, and stick-on pads are less critical than the joints that hold a side panel. Even then, use the part made for the hole. The delivery note is where shortage at the door should have been written down. If you discover it only now, write it down anyway, with photos.
After the tools are away
Keep the manual. The anchor step, if the piece has one, happens before the piece is loaded with books. Heavy items go on lower shelves when the manual allows that arrangement. It lowers the center of weight.
A week or two of ordinary use can loosen a lock that was not fully turned. Recheck the fasteners the sheet tells you to recheck. If it is silent, a calm pass over the structural joints is still reasonable. Do not keep tightening until you crush the board.
Care from this point depends on the surface. Materials and care covers wood movement, cloth codes, and heat from a vent. If the piece is tall, do not skip anchoring because the case already feels steady while it is empty.
Read the sheet as a sequence, not as a pile of parts
Open the carton onto a floor you have already cleared, larger than the finished piece, and keep the hardware bags closed until the step that names them. Spread the panels so you can see edges and finished faces, but do not stack them in a new puzzle that hides the labels. The drawing’s first job is to tell you which face is out and which edge receives a dowel. A panel turned over will sometimes accept the first bolts and then refuse the back, the hinge, or the drawer. That is the moment to stop and rotate, not the moment to enlarge a hole.
Learn the handful of parts that show up on most household sheets, and then use only the names your sheet uses. A cam lock is a round fitting that turns and pulls a bolt into the edge of a panel. A dowel is a plain peg that keeps two panels from sliding. A barrel nut is a cross-wise cylinder that a bolt threads into. Confusing them is how the wrong fastener gets driven into particle board. If your sheet uses different names, follow the sheet. This paragraph is a glossary, not a substitute diagram.
Square, snug, then the final turn
Fit the joints so the case sits flat on the floor you will actually use, not on a carpet so thick the case rocks. Check the diagonals of the rectangle. If they match, the case is square enough for drawers and doors to have a chance. If they do not, the case is a parallelogram and no amount of later tightening will invent a right angle. Ease the locks, nudge the case square, check again, then make the final turns. Where the sheet says hand-tighten, believe it. A driver with a high clutch snaps cams and strips the board the cam sits in. The board does not grow back.
Back panels, especially thin ones that slide into a groove, are part of the square. They are not decorative cardboard you can leave out because the case already feels stiff. If the drawing shows the back going in before the last rails, that order is the structure. Glass, long rails, and wide tops are a two-person hold when the drawing shows two people. Starting alone and hoping is how a corner hits the floor. Wait.
When a part is missing or a hole does not meet
Stop. Do not borrow a structural screw from another product because it looks close. A bolt a few millimeters longer punches a finished face. A shorter one holds for a week. Contact the seller or the maker through the process on their paperwork, and keep the remaining hardware in the labeled bags. Shelf pins and caps are less critical than the joints that hold a side, and they still belong in the holes they were made for. Write down what is missing, with a photo, even if you already signed at the door. A late discovery is still a fact.
After the case is together, keep the manual in the house. Recheck the structural fasteners after ordinary use has worked the joints, and stop when they are firm. Crushing the board is not extra strength. If the piece is tall, anchor it before you load it, using the kit and the wall the anchoring note describes. Heavy things go low when the manual allows that arrangement. Then the job becomes care, which depends on the surface in front of you, not on a single cleaner for every material in the room.