Dell PowerEdge R7525 BOSS S2 kit screw size
M3 · 4.5 mm long
The screws used on Dell PowerEdge R7525 BOSS S2 kit are M3, 4.5 mm long.
Where it is used: BOSS S2 kit component screws listed in kit components table (Table 39) as M3 x 0.5 x 4.5 mm screws.
This entry is marked confirmed and comes from 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 BOSS S2 kit 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 kit component screws listed in kit components table (Table 39) as M3 x 0.5 x 4.5 mm screws | Confirmed |
Fitment records and sources
BOSS S2 kit component screws listed in kit components table (Table 39) as M3 x 0.5 x 4.5 mm screws
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.
- 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.
- 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.
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Devices whose records share a thread with Dell PowerEdge R7525 BOSS S2 kit, closest length match first.
- 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
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M3 × 4.5 mm
- Dell PowerEdge R7525 also M3 × 4.5 mm
- 2.5in SATA / SAS hard drives and SSDs (SFF-8201) also M3 × 4.5 mm
- Network switch & patch panel internals also M3 × 4.5 mm
- Olympus BH-2 microscope frame also M3 × 4.5 mm
- HP Compaq Presario R4000 also M3 × 4.5 mm
Questions about Dell PowerEdge R7525 BOSS S2 kit screws
- What size screw does Dell PowerEdge R7525 BOSS S2 kit use?
- M3 × 4.5 mm for BOSS S2 kit component screws listed in kit components table (Table 39) as M3 x 0.5 x 4.5 mm screws.
- How long are the screws in Dell PowerEdge R7525 BOSS S2 kit?
- 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 BOSS S2 kit?
- 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.