Tuttnauer manual autoclaves screw size
M4 · 8 mm long
If you are replacing a screw on Tuttnauer manual autoclaves, the thread is M4, 8 mm long.
Where it is used: "Screw, Metric M4 X 8" (part RPH130), a Phillips pan head machine screw sold as a replacement part for Tuttnauer manual autoclaves.
Head and drive, as the source states them: pan head and Phillips drive.
This entry is marked confirmed and comes from store.sterilizers.com.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Tuttnauer manual autoclaves 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 | 8 mm | 0.7 mm | Pan head | Phillips | "Screw, Metric M4 X 8" (part RPH130), a Phillips pan head machine screw sold as a replacement part for Tuttnauer manual autoclaves | Confirmed |
Fitment records and sources
"Screw, Metric M4 X 8" (part RPH130), a Phillips pan head machine screw sold as a replacement part for Tuttnauer manual autoclaves
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- 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: for pan head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 8 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source names a Phillips 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
- Bopla SHR-Z boss screws and Hammond 1591XXF screws look metric but are self-tapping/imperial — don't substitute a machine screw into those bosses.
- Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.
More in Industrial & Machinery
The same screw also fits
Devices whose records share a thread with Tuttnauer manual autoclaves, closest length match first.
- Pinball machine fan screw also M4 × 8 mm
- Pinball cabinet hardware (EU restorations) also M4 × 8 mm
- Rhea Vendors Luce Publico vending machine also M4 × 8 mm
- Juki MF-7923 / MF-7523 industrial machine also M4 × 8 mm
- Singer Viking Emerald 203 sewing machine also M4 × 8 mm
- Makita GB801 also M4 × 8 mm
- Elo self-service kiosk stand base screw (Bag A/B) also M4 × 8 mm
- Portable 13-15in travel monitors also M4 × 8 mm
Questions about Tuttnauer manual autoclaves screws
- What size screw does Tuttnauer manual autoclaves use?
- M4 × 8 mm for "Screw, Metric M4 X 8" (part RPH130), a Phillips pan head machine screw sold as a replacement part for Tuttnauer manual autoclaves.
- How long are the screws in Tuttnauer manual autoclaves?
- The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Tuttnauer manual autoclaves?
- The source lists a Phillips 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.