Step 3
There is a M4 threaded holes on another 2040 aluminum profile.
When installation, users make the threaded hole face the metal sheet
part.
1. 2040 aluminum profile--length 456mm (1pcs)
2. M5
×
16 hexagon round-head screws (2pcs)
3. M5×10 hexagon round-head screws (2pcs)
4. M4×8 hexagon cup-head screws (4pcs)