StarTech rack screw and cage-nut kit screw size
M6 · 12 mm long
If you are replacing a screw on StarTech rack screw and cage-nut kit, the thread is M6, 12 mm long.
Where it is used: M6 x 12mm screws with cage nuts for server rack and cabinet mounting.
This entry is marked confirmed and comes from dell.com.
For reference, M6 is 6 mm across the threads at 1 mm pitch. The imperial size people confuse it with: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
StarTech rack screw and cage-nut kit screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M6 | 12 mm | 1 mm | not stated | not stated | M6 x 12mm screws with cage nuts for server rack and cabinet mounting | Confirmed |
Fitment records and sources
M6 x 12mm screws with cage nuts for server rack and cabinet mounting
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 1 mm from one thread crest to the next (10 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 12 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M6 heads take PH3 for Phillips and T30 for Torx, and a 5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M6 is about 7-10 N·m into metal threads and 2.5-4.0 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M6
- Server rack cage nuts come in M4/M5/M6 for the same square hole — confirm what your rails and equipment ears use.
- Rack cage nuts come in M5, M6 and 10-32 and look nearly identical; M6 is most common on modern gear.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with StarTech rack screw and cage-nut kit, closest length match first.
- Ninebot Max G30 rear fender also M6 × 12 mm
- 19-inch server racks also M6 × 12 mm
- Weidmueller FKSC busbar screw accessory also M6 × 12 mm
- 19-inch rack cage nut and panel screw also M6 × 12 mm
- StarTech CABSCRWM620 rack kit also M6 × 12 mm
- Wurth Elektronik WA-SSTIE steel spacer stud also M6 × 12 mm
- Xiaomi M365 / Ninebot brake caliper also M6 × 12 mm
- Rittal SZ 4182.000 mounting bracket PS also M6 × 12 mm
Questions about StarTech rack screw and cage-nut kit screws
- What size screw does StarTech rack screw and cage-nut kit use?
- M6 × 12 mm for M6 x 12mm screws with cage nuts for server rack and cabinet mounting.
- How long are the screws in StarTech rack screw and cage-nut kit?
- The record gives 12 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M6 screw?
- 1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
- What screwdriver do I need for StarTech rack screw and cage-nut kit?
- The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
- Can I use an imperial screw instead of M6?
- No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.