Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner screw size
M4 · length not stated in the sources
The screws used on Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner are M4. None of the sources we found gives an exact length, so measure the original before you order.
The record covers assembly instructions manual for the Supreme M4 motor unit and diaphragm assembly explicitly documents M4-threaded fasteners used to secure the motor housing and caddy components.
This entry is marked likely and comes from manuzoid.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.
Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner 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 | not stated | Assembly instructions manual for the Supreme M4 motor unit and diaphragm assembly explicitly documents M4-threaded fasteners used to secure the motor housing and caddy components | Likely |
Fitment records and sources
Assembly instructions manual for the Supreme M4 motor unit and diaphragm assembly explicitly documents M4-threaded fasteners used to secure the motor housing and caddy components
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Printer and CNC builds usually publish a bill of materials; when it lists a length, follow it, since extrusion T-nuts and motor faces have fixed thread depths.
- 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 does not name the drive. Standard M4 heads take PH2 for Phillips and T20 for Torx, and a 3 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 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
- US-made pinball machines (Williams/Bally/Stern) overwhelmingly use imperial UTS threads (#6-32, #8-32, #10-32); explicit metric threads only appear on newer/import components such as Jersey Jack Pinball's Hobbit Smaug assembly (M3).
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
More in 3D Printing, CNC & Robotics
The same screw also fits
Devices whose records share a thread with Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner, closest length match first.
- Bondtech primary gear (8mm bore) also M4
- InMoov open-source robot also M4
- Ultimaker Original heated bed / Z-stage upgrade kit also M4
- Inventables X-Carve 300W 24VDC spindle kit also M4
- Makeblock mBot Neo/mBot2 assembly kit also M4
- BigTreeTech Manta M8P printer mainboard also M4
- Zodiac Vortex 3 Saphir robotic pool cleaner also M4
- LEGO Technic-compatible threaded metal axle also M4
Questions about Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner screws
- What size screw does Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner use?
- M4 for assembly instructions manual for the Supreme M4 motor unit and diaphragm assembly explicitly documents M4-threaded fasteners used to secure the motor housing and caddy components.
- How long are the screws in Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner?
- 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 Maytronics Dolphin Supreme M4 Robotic Pool/Pond Cleaner?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take 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.