Synology DS923+ NAS screw size
M3 · length not stated in the sources
If you are replacing a screw on Synology DS923+ NAS, the thread is M3. None of the sources we found gives an exact length, so measure the original before you order.
The record covers hardware installation guide lists M3 screws for drive and M.2 component installation.
This entry is marked confirmed and comes from global.synologydownload.com.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Synology DS923+ NAS 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 |
|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | Hardware installation guide lists M3 screws for drive and M.2 component installation | Confirmed |
Fitment records and sources
Hardware installation guide lists M3 screws for drive and M.2 component installation
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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.
- Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Many gas-detector and sensor manuals only give a torque spec (e.g. '0.5 N·m max') without repeating the thread size at every mention — the explicit M3 callout is usually only in the accessories/spare-parts table, not the main installation steps.
- Cleanroom/vacuum-rated M3 screws (titanium, vented, low-outgas) from NBK are a distinct specialty class, priced and sourced very differently from commodity M3 hardware — do not substitute one for the other in semiconductor fixtures.
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Devices whose records share a thread with Synology DS923+ NAS, closest length match first.
- Gaggia Grinder MDF55 (commercial coffee grinder) also M3
- Apple AirPort Extreme internals also M3
- Keystone metric hex PCB standoff also M3
- HARTING connector insert fixing screw also M3
- Dell/HP SFF 2.5-inch drive tray also M3
- UCTRONICS U6264 1U Raspberry Pi rack mount also M3
- Ubiquiti UniFi AP-AC-PRO access point also M3
- Ubiquiti UniFi AP ceiling mount also M3
Questions about Synology DS923+ NAS screws
- What size screw does Synology DS923+ NAS use?
- M3 for hardware installation guide lists M3 screws for drive and M.2 component installation.
- How long are the screws in Synology DS923+ NAS?
- 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 M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Synology DS923+ NAS?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.