BOM

Enclosure

Extrusions

4x 430mm 2020 Aluminium Extrusion with all end holes tapped for either M5 or M6 bolts

Plates

2x End plates, with holes expanded for M6 if 2020 is using M6 bolts (holes are sized for M5 by default)
1x Front left handle plate
1x Front right handle plate
6x Reinforcement plates

Bolts/Nuts

16x M5x8mm button head bolt (for securing front and reinforcement plates to extrusion)
8x M5x16mm button head bolt (for securing end plates to the ends of extrusion, use M6 if tapped for M6)
4x M5x20mm button head bolt (for securing handles to the front handle plates)
16x M5 2020 hammer nuts

Backplane (each)

Bolts/Nuts

4x M5x8mm
4x M5 2020 hammer nuts
4x M5 washer (~1mm thick)

Caddy (each)

Bolts/Nuts

2x M5x8mm button head bolt
2x M5 2020 hammer nuts