Alaris 8110/8120 infusion pump screw size
M2.5 · 12 mm long
Our records put Alaris 8110/8120 infusion pump on M2.5 screws, 12 mm long.
Where it is used: motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb.
This entry is marked confirmed and comes from frankshospitalworkshop.com.
M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
Alaris 8110/8120 infusion pump screw specifications
One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Torque | Where it goes | Status |
|---|---|---|---|---|---|---|---|
| M2.5 | 12 mm | 0.45 mm | not stated | not stated | 4 in-lb | motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb | Confirmed |
Fitment records and sources
motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Keep material and finish the same as the original (often stainless) on equipment that is cleaned or sterilised.
- Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.45 mm from one thread crest to the next (22.22 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 12 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 M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
Common mix-ups with M2.5
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- Commonly confused with imperial 4-40 screws in older medical equipment, but modern GE/Mindray devices explicitly list M2.5 metric threads.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
More in Medical & Laboratory
The same screw also fits
Devices whose records share a thread with Alaris 8110/8120 infusion pump, closest length match first.
- Pioreactor Raspberry Pi HAT assembly also M2.5 × 12 mm
- Lab balance leveling foot also M2.5 × 12 mm
- Nerf blaster tool-less thumbscrews also M2.5 × 12 mm
- Toshiba Satellite Pro M10 also M2.5 × 12 mm
- HP EliteBook 8560w also M2.5 × 12 mm
- Dell Inspiron 4150 also M2.5 × 12 mm
- Dell Inspiron 8600 also M2.5 × 12 mm
- Dell Latitude C540 also M2.5 × 12 mm
Questions about Alaris 8110/8120 infusion pump screws
- What size screw does Alaris 8110/8120 infusion pump use?
- M2.5 × 12 mm for motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb.
- How long are the screws in Alaris 8110/8120 infusion pump?
- The record gives 12 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for Alaris 8110/8120 infusion pump?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
- How tight should the M2.5 screw on Alaris 8110/8120 infusion pump be?
- The source gives 4 in-lb for motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb.
- Where can I buy replacement screws for Alaris 8110/8120 infusion pump?
- TechSpareWarehouse (our own store) lists M2.5 x 12mm, which matches the length in the records above.