StarTech.com CABSCREWM6B — M6 x 12 mm Rack Screws and Cage Nuts, 50-Pack, Black
M6 thread50-packCage nuts + toolBlack
The StarTech.com CABSCREWM6B is a 50-pack of M6 x 12 mm rack mounting screws with matching square-hole cage nuts and a cage nut installation tool, used to fix servers, switches, patch panels, shelves and other rack-mount equipment into 19-inch or 10-inch racks and cabinets that use square-hole rails (the most common type in 19-inch server and network cabinets).
The screws are all-black steel in black with washers pre-installed, so they sit flat against rack ears without scratching them. Enough for 12 devices at four screws each, with spares — ideal for a new cabinet fit-out or for replacing lost hardware.
Before you order: M6 is the most common size in European 19-inch server and network cabinets, but it is not interchangeable with M5 or 10-32. If you are unsure, check an existing screw or the cabinet manual.
What's in the Box
- 50 × M6 x 12 mm screws (washers pre-installed)
- 50 × M6 cage nuts for square-hole rails
- 1 × cage nut installation tool
What It Means in Practice
- The usual choice for black 19-inch network and server cabinets with square-hole rails.
- Black screws and cage nuts blend in with black rails and rack ears for a clean front.
- 50 sets are enough for 12 devices at four screws each, with spares.
- The included tool makes fitting and removing cage nuts quick and safe.
What Will Not Work
- Racks or devices that require M5 or 10-32 screws.
- Round-hole or already-tapped rails with the cage nuts (use the screws alone on tapped M6 rails).
- Supporting the full weight of a heavy server on screws alone — use the server vendor rail kit.
Key Features
M6 thread, 12 mm
Standard length for fixing rack ears, shelves and panels to cage nuts.
Pre-installed washers
Protect the finish of rack ears and help the screw seat evenly.
All-black steel
Black finish that blends in with black cabinets and equipment.
Installation tool included
The cage nut tool makes fitting and removing cage nuts faster and saves fingers.
Technical Specifications
| Identification |
| Part Number |
CABSCREWM6B |
| EAN / GTIN |
0065030862080 |
| MPN |
CABSCREWM6B |
| Brand |
StarTech.com |
| Hardware |
| Thread |
M6 (metric) |
| Screw Length |
12 mm |
| Quantity |
50 M6 screws + 50 M6 cage nuts |
| Cage Nuts |
Yes, square-hole type |
| Installation Tool |
Included |
| Washers |
Pre-installed |
| Rack Compatibility |
19-inch and 10-inch racks, cabinets and enclosures |
| Physical |
| Material |
Steel |
| Finish |
All-black |
| Colour |
Black |
| Pack Weight |
502.8 g |
| Compliance |
TAA |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
2-year warranty per StarTech.com — claims handled through Singular |
Frequently Asked Questions
Will these fit my DIGITUS, Rittal, APC or Intellinet cabinet?
Most European 19-inch cabinets with square-hole rails use M6 cage nuts. Check the cabinet documentation, or send us the model and we will confirm.
What is the difference from CABSCREWM6?
Finish: CABSCREWM6B is all-black; CABSCREWM6 is silver nickel-plated. Contents are the same.
Are washers included?
Yes, the screws come with washers pre-installed.
Singular Expert Insight · Buyer's Guide
This is the kit most black cabinets need: M6 screws, M6 square-hole cage nuts and a tool in one pack. Keep a spare bag with every rack — lost cage nuts are the most common reason an installation stalls. Screws, cage nuts, shelves and cable managers are all in our
rack accessories range.
✓ Buy it if your cabinet has square-hole rails for M6 and you want black hardware with a tool included.
✕ Skip it if your rack uses M5 (CABSCREWM5B) or 10-32 (CABSCREW1032) hardware.
→ Also consider StarTech.com CABSCREWM6 (silver M6 kit) and CABSCRWSM62B (100 black M6 screws, no nuts).
Not sure which thread your rack uses? Send us the rack or cabinet model and we will tell you which pack you need.