StarTech.com CABSCREWM5B — M5 x 12 mm Rack Screws and Cage Nuts, 50-Pack, Black
M5 thread50-packCage nuts + toolBlack
The StarTech.com CABSCREWM5B is a 50-pack of M5 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: M5 is not interchangeable with M6 or 10-32. Check the size your rack or device expects — M6 is the most common in European server and network cabinets, M5 in many smaller wall cabinets and some AV racks, 10-32 in many US-made racks.
What's in the Box
- 50 × M5 x 12 mm screws (washers pre-installed)
- 50 × M5 cage nuts for square-hole rails
- 1 × cage nut installation tool
What It Means in Practice
- Black screws and nuts disappear against black cabinets, rails and rack ears for a clean front view.
- Clip a cage nut into the square hole from the inside of the rail, then screw the device ear into it.
- 50 sets cover a full fit-out of a small cabinet, with spares for later changes.
- The included tool makes fitting and removing cage nuts quick and safe.
What Will Not Work
- Racks or devices that require M6 or 10-32 screws — the thread will not match.
- Round-hole or already-tapped rails with the cage nuts (use the screws alone on tapped M5 rails).
- Supporting the full weight of a heavy server on screws alone — use the server vendor rail kit.
Key Features
M5 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 |
CABSCREWM5B |
| EAN / GTIN |
0065030862103 |
| MPN |
CABSCREWM5B |
| Brand |
StarTech.com |
| Hardware |
| Thread |
M5 (metric) |
| Screw Length |
12 mm |
| Quantity |
50 M5 screws + 50 M5 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 |
450 g |
| Compliance |
TAA |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
2-year warranty per StarTech.com — claims handled through Singular |
Frequently Asked Questions
What is the difference from CABSCREWM5?
Only the finish: CABSCREWM5B is all-black, CABSCREWM5 is silver nickel-plated. Thread, length and pack contents are the same.
How do I know if my rack needs M5 or M6?
Check the rack manual or an existing screw. If unsure, send us the cabinet model and we will check.
Are washers included?
Yes, the screws come with washers pre-installed.
Singular Expert Insight · Buyer's Guide
The black M5 kit is the same hardware as the silver CABSCREWM5 in a finish that matches black cabinets. As with every screw pack, thread size is the only thing to get right: M5 only if your rack or device calls for it. Screws, cage nuts, shelves and cable managers are all in our
rack accessories range.
✓ Buy it if your square-hole rack uses M5 cage nuts and you want black hardware with a tool included.
✕ Skip it if your rack uses M6 (choose CABSCREWM6B) or 10-32 (choose CABSCREW1032).
→ Also consider StarTech.com CABSCREWM5 (silver M5 kit) and CABSCREWSM5 (100 spare M5 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.