Square-hole server rack (cage-nut hardware) screw size
M6 · length not stated in the sources
Our records put Square-hole server rack (cage-nut hardware) on M6 screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers standard square-hole rack mounting: M6 cage nuts with M6 pan-head screws and washers — the usual kit for Cisco/Supermicro/Ubiquiti gear.
Head and drive, as the source states them: pan head.
This entry is marked confirmed and comes from assets.tripplite.com.
An M6 screw is 6 mm in diameter with a 1 mm pitch, tapped with a 5 mm drill; imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
Square-hole server rack (cage-nut hardware) 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 | not stated | 1 mm | Pan head | not stated | Standard square-hole rack mounting: M6 cage nuts with M6 pan-head screws and washers — the usual kit for Cisco/Supermicro/Ubiquiti gearwasher / flange face | Confirmed |
Fitment records and sources
Standard square-hole rack mounting: M6 cage nuts with M6 pan-head screws and washers — the usual kit for Cisco/Supermicro/Ubiquiti gear
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- 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: for pan head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- 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.
- 19-inch rack rails use three incompatible thread standards that share the same square hole: M6, 10-32 UNF and 12-24 UNC. Cage nuts for all of them look identical in a parts bin.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Square-hole server rack (cage-nut hardware), closest length match first.
- SAMCON T07 series Ex-d enclosure also M6
- Rittal VX VX enclosure hinge countersunk Torx screw also M6
- Motorcycle/scooter turn signal indicator mounting bolt also M6
- Rack mounting screw and cage nut set (NRS-M1616-N-50) also M6
- Weidmueller FKSC busbar screw accessory also M6
- EG4 Electronics Welded Indoor Battery Cabinet (BC-6-WD-00) also M6
- item Roller Conveyor Aluminum Fastening Bracket D30 also M6
- 19-inch server racks also M6
Questions about Square-hole server rack (cage-nut hardware) screws
- What size screw does Square-hole server rack (cage-nut hardware) use?
- M6 for standard square-hole rack mounting: M6 cage nuts with M6 pan-head screws and washers — the usual kit for Cisco/Supermicro/Ubiquiti gear.
- How long are the screws in Square-hole server rack (cage-nut hardware)?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Square-hole server rack (cage-nut hardware)?
- 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.