Dell PowerEdge R7525 screw size
M3 · 4.5 mm long
Dell PowerEdge R7525 takes M3 metric screws, 4.5 mm long.
There are 2 separate fitment records for it, including BOSS S2 card M.2 SSD retention and card module screw (M3 x 0.5) (M3) and BOSS S2 controller card module and M.2 SSD retention screw securing SSD to BOSS S2 card ca (M3).
2 of the 2 records are marked confirmed, drawn from 1 source (newserverlife.com).
M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Dell PowerEdge R7525 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 | 4.5 mm | 0.5 mm | not stated | not stated | BOSS S2 card M.2 SSD retention and card module screw (M3 x 0.5) | Confirmed |
| M3 | 4.5 mm | 0.5 mm | not stated | not stated | BOSS S2 controller card module and M.2 SSD retention screw securing SSD to BOSS S2 card carrier and Riser 1 | Confirmed |
Fitment records and sources
BOSS S2 card M.2 SSD retention and card module screw (M3 x 0.5)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
BOSS S2 controller card module and M.2 SSD retention screw securing SSD to BOSS S2 card carrier and Riser 1
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 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.
- The record states 4.5 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 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
- Server drive caddy screws (Dell, HP) are usually M3 in very short lengths (3-4mm) because they bite into thin sheet metal — they are NOT the 6-32 UNC screws that go into the drive's own side holes.
- M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Dell PowerEdge R7525, closest length match first.
- 2.5in SATA / SAS hard drives and SSDs (SFF-8201) also M3 × 4.5 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M3 × 4.5 mm
- Network switch & patch panel internals also M3 × 4.5 mm
- Dell PowerEdge R7525 BOSS S2 kit also M3 × 4.5 mm
- Mean Well NMP650 / NMP1K2 modular power supply also M3 × 4.5 mm
- Cognex In-Sight 8000/8200/8400 vision system also M3 × 4.5 mm
- Meade LX200 Barlow / eyepiece retaining screw also M3 × 4.5 mm
- LED video wall cabinet bezel and bracket-link screws also M3 × 4.5 mm
Questions about Dell PowerEdge R7525 screws
- What size screw does Dell PowerEdge R7525 use?
- M3 × 4.5 mm for BOSS S2 card M.2 SSD retention and card module screw (M3 x 0.5); M3 × 4.5 mm for BOSS S2 controller card module and M.2 SSD retention screw securing SSD to BOSS S2 card carrier and Riser 1.
- How long are the screws in Dell PowerEdge R7525?
- The record gives 4.5 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Dell PowerEdge R7525?
- 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.