Rack-mount servers, switches and routers screw size
M6 · 19 mm long
Rack-mount servers, switches and routers takes M6 metric screws, 19 mm long.
Where it is used: kendall Howard rack screw datasheet lists M6 rack screws.
This entry is marked confirmed and comes from mm.digikey.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.
Rack-mount servers, switches and routers 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 | 19 mm | 1 mm | not stated | not stated | Kendall Howard rack screw datasheet lists M6 rack screws | Confirmed |
Fitment records and sources
Kendall Howard rack screw datasheet lists M6 rack screws
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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 19 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
- Rack hole threads vary: 10-32 and 12-24 are still common in US racks alongside M6 - check the rail before buying.
- Server rack cage nuts come in M4/M5/M6 for the same square hole — confirm what your rails and equipment ears use.
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Devices whose records share a thread with Rack-mount servers, switches and routers, closest length match first.
- Weight machine adjustment brackets also M6 × 19 mm
- Industrial machinery also M6 × 19 mm
- Car license plate also M6 × 19 mm
- RF Elements Twin Horn antenna bracket also M6 × 19 mm
- FJD 3D Excavator Guidance System (GNSS/IMU hardware) also M6 × 19 mm
- Power wheelchair drive motor mounts also M6 × 19 mm
- Electrolux Professional compact rack-type dishwasher also M6 × 19 mm
- Yamaha F25 / T25 outboard motor also M6 × 19 mm
Questions about Rack-mount servers, switches and routers screws
- What size screw does Rack-mount servers, switches and routers use?
- M6 × 19 mm for kendall Howard rack screw datasheet lists M6 rack screws.
- How long are the screws in Rack-mount servers, switches and routers?
- The record gives 19 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 Rack-mount servers, switches and routers?
- 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.