Hillrom Centrella Smart+ Bed control panel/electronics housing screw size
M3 · length not stated in the sources
If you are replacing a screw on Hillrom Centrella Smart+ Bed control panel/electronics housing, 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 service manual for the Centrella Smart+ hospital bed documents M3 machine screws used to secure the control panel PCB and pendant housing covers during disassembly/service procedures.
This entry is marked likely and comes from manualslib.com.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Hillrom Centrella Smart+ Bed control panel/electronics housing 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 | Service manual for the Centrella Smart+ hospital bed documents M3 machine screws used to secure the control panel PCB and pendant housing covers during disassembly/service procedures | Likely |
Fitment records and sources
Service manual for the Centrella Smart+ hospital bed documents M3 machine screws used to secure the control panel PCB and pendant housing covers during disassembly/service procedures
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
- Sonos speakers mix lengths within one unit — M3 for driver housings, M2.5 at the control panel. Keep them sorted during teardown.
- Power-tool gearcase and clamshell screws are usually thread-forming (marked "ST") even when the parts list gives an M-size — a normal machine screw of the same size may not hold in the plastic boss.
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Questions about Hillrom Centrella Smart+ Bed control panel/electronics housing screws
- What size screw does Hillrom Centrella Smart+ Bed control panel/electronics housing use?
- M3 for service manual for the Centrella Smart+ hospital bed documents M3 machine screws used to secure the control panel PCB and pendant housing covers during disassembly/service procedures.
- How long are the screws in Hillrom Centrella Smart+ Bed control panel/electronics housing?
- 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 Hillrom Centrella Smart+ Bed control panel/electronics housing?
- 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.