IKEA · Chairs & Stools
How to assemble IKEA TONSTAD Chair
Step-by-step IKEA TONSTAD Chair assembly: 15 illustrated steps, an animated video, the hardware list and the tools you need — following the official instructions (AA-2501823-3).
- 15 illustrated steps
- 11 steps in the manual
- 2:30 video
- 45×53×91 cm
What you need
Tools
- Flat-head screwdriver
- Phillips screwdriver
- Allen key (included)
Hardware in the box
| Part no. (as printed in the manual) | Qty |
|---|---|
| 100159 | 4× |
| 100505 | 4× |
| 115983 | 4× |
| 108445 | 1× |
| 148819 | 1× |
| 10032286 | 4× |
Step-by-step assembly
Step 1
Push 2 barrel nuts (100505) into the back frame.
Lay the back frame on its back on a rug.
Step 2 · manual step 1
Screw 2 bolts (100159) into them by hand.
Turn the barrel nut with a flat screwdriver so the bolt catches. Leave the bolts sticking out.
Step 3 · manual step 2
Slide the two side rails down onto the bolts.
The oval openings face inwards.
Step 4 · manual step 3
Slide a washer (115983) under each bolt head and tighten.
Allen key (111631). The washer must sit flush, not squeezed out of shape.
Step 5 · manual step 4
Front frame: 2 barrel nuts (100505), then 2 bolts (100159).
Same as step 1 — screw the bolts in by hand.
Step 6 · manual step 5
Press the front frame down onto the side rails.
Step 7 · manual step 5
Turn the chair upside down onto a table.
The backrest hangs over the edge.
Step 8 · manual step 6
Washers (115983) under the front bolt heads, then tighten.
Again the washer must sit flush in the opening.
Step 9 · manual step 7
Turn the chair upright.
Step 10 · manual step 7
Tighten all 4 bolts with the Allen key.
Check that every washer sits flush in its opening.
Step 11 · manual step 8
Seat face-down: push in the stop block (148819) and fix it with a screw (108445).
The hole at the front edge of the seat. Phillips screwdriver.
Step 12 · manual step 9
Push the 4 seat clips (10032286) into the seat.
Into the pairs of holes near the side edges.
Step 13 · manual step 10
Turn the chair upside down onto the seat.
The stop block goes behind the front rail.
Step 14 · manual step 11
Press each clip onto the rail until it clicks.
4 clips.
Step 15
Turn the chair upright.
Your TONSTAD chair is ready.
Tips & safety
- Washers flush, not squeezed. Tighten the bolts only until each washer (115983) sits flush in its opening (manual steps 3 and 6).
- Work on a rug, and use a table for steps 5–11. The manual shows this so the parts don’t get scratched. Unsure about a step? Contact IKEA.
Official instructions
This guide follows IKEA’s official assembly instructions (AA-2501823-3). Keep the printed manual to hand — if anything differs, the manual is right.
