Synology DS725+ NAS screw size
M3 · length not stated in the sources
If you are replacing a screw on Synology DS725+ NAS, the thread is M3. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for hardware manual lists M3 screws for securing drives and components.
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 DS725+ 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 manual lists M3 screws for securing drives and components | Confirmed |
Fitment records and sources
Hardware manual lists M3 screws for securing drives and components
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
- 3.5in drives and 5.25in bays are 6-32; 2.5in drives and motherboard standoffs are M3. Keep the two bins apart.
- Post-2018 3.5in drives have shallower bottom holes; an over-long screw can puncture the drive housing.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Synology DS725+ NAS, closest length match first.
- Wurth Elektronik WA-SSTIE steel spacer stud also M3
- Dell PowerEdge hard drive caddy (part 2864D) also M3
- MikroTik RouterBoard case also M3
- Essentra MTNSP-M3-10-3 male-to-male standoff also M3
- Raymarine Axiom 2 Pro Chassis grounding lug fastener on chartplotter housing also M3
- Cognex In-Sight 8000/8200/8400 vision system also M3
- Keystone aluminum hex standoff (P/N 24438) also M3
- Buffalo WZR-300HP router also M3
Questions about Synology DS725+ NAS screws
- What size screw does Synology DS725+ NAS use?
- M3 for hardware manual lists M3 screws for securing drives and components.
- How long are the screws in Synology DS725+ 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 DS725+ 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.