A bare rack is not a rack. Before you slide in the first server, the cage nuts, shelves, blanking panels, managers, PDU and cords decide whether the install takes an afternoon or a week — this is the parts list ops teams wish they had on day one.
Every bare rack gets outfitted differently. Before ordering parts, answer three questions: what will mount here (standard servers, GPU nodes or network gear), how many units, and what power does each draw. That drives the mounting hardware, the shelf count, the PDU/cord mix and how much vertical cable space you need.
| Part | Rough quantity for a mixed 42U rack | Why |
|---|---|---|
| Cage nuts & screws | 100-200 incl. spares | ~4 per rail-mounted unit, plus losses |
| 1U shelves | 1 per 4-6 U of non-rail gear | Heavy units should never float on ears alone |
| Blanking panels | Fill every empty U | Airflow discipline prevents hot spots |
| Cable managers | Horizontal per dense U; vertical per side | Cords need a path, not a pile |
Numbers are planning starting points — your quote should reflect the actual device count and rail style. For the dressing workflow itself, see our server rack cable management guide.
A rack starter combo covers the common base — cage nuts, blanking panels, a shelf and cable management for one rack — so first installs do not start with five separate orders and a mid-job stock-out. Once the rack is live, top up per-line: cage nut kits for expansion, 1U shelves and blanking panels as the rack densifies, cable managers when new lanes arrive.
Equip a rack from our rack starter combo, cage nut kits, cable management racks and C19 power cords — or send us your rack list and we will quote the outfit against it.
Start with mounting hardware (cage nuts and screws), 1U shelves for heavy units, blanking panels to seal empty U positions, horizontal and vertical cable managers, a PDU plus matching power cords, and labels. The exact mix depends on the workload: a GPU rack needs heavier power (C19/C20 lanes) and more vertical space for thick cords, while a general-purpose rack leans on shelves and horizontal managers.
Estimate per device rather than per U: most rail-mounted units use four cage-nut positions (two per side), heavier or double-rail units use more. For a mixed 42U rack, a practical starting point is roughly 100-200 cage nuts including spares — then buy in kits so you do not run short mid-install. Add about 10-20% spares for lost or stripped fasteners.
Yes, for two reasons: blanking panels stop conditioned air from leaking through empty U positions and creating hot spots, and cable managers keep thick C19/C20 power cords and patch cables organised so airflow and maintenance do not suffer. In high-density racks both are cheap insurance against thermal and service headaches.