Midmark M9/M11 Sterilizer screw size
M4 · length not stated in the sources
Midmark M9/M11 Sterilizer takes M4 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers screws for door latch repair kit and cover fixation (T25 Torx head specified in kit).
Head and drive, as the source states them: Torx T25 drive.
This entry is marked confirmed and comes from technicallibrary.midmark.com.
For reference, M4 is 4 mm across the threads at 0.7 mm pitch. The imperial size people confuse it with: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Midmark M9/M11 Sterilizer 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 |
|---|---|---|---|---|---|---|
| M4 | not stated | 0.7 mm | not stated | Torx T25 | Screws for door latch repair kit and cover fixation (T25 Torx head specified in kit) | Confirmed |
Fitment records and sources
Screws for door latch repair kit and cover fixation (T25 Torx head specified in kit)
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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 M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 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 names a Torx T25 drive. For comparison, standard M4 heads take PH2 (Phillips) or T20 (Torx), or a 3 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
More in Medical & Laboratory
The same screw also fits
Devices whose records share a thread with Midmark M9/M11 Sterilizer, closest length match first.
- Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge also M4
- Takara Belmont PRO III 047 dental chair also M4
- cab XD4T industrial label printer also M4
- TSC MH241 industrial label printer also M4
- Belmont Eurus S6 Dental Unit also M4
- Vitali T5 dental unit also M4
- HERMLE Z 327 K laboratory centrifuge also M4
- Hitachi SEM sample stubs also M4
Questions about Midmark M9/M11 Sterilizer screws
- What size screw does Midmark M9/M11 Sterilizer use?
- M4 for screws for door latch repair kit and cover fixation (T25 Torx head specified in kit).
- How long are the screws in Midmark M9/M11 Sterilizer?
- 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 M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Midmark M9/M11 Sterilizer?
- The source lists a Torx T25 drive. Standard M4 heads otherwise take PH2 (Phillips) or T20 (Torx), or a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.