Gaggia Grinder MDF55 (commercial coffee grinder) screw size
M3 / M4 · length not stated in the sources
Our records put Gaggia Grinder MDF55 (commercial coffee grinder) on M3 and M4 screws. None of the sources we found gives an exact length, so measure the original before you order.
There are 2 separate fitment records for it, including service manual specifies maximum tightening torque of 1.2 Nm for M3 screws used in grinder (M3) and service manual specifies maximum tightening torque of 2.2 Nm for M4 screws used in grinder (M4).
2 of the 2 records are marked confirmed, drawn from 1 source (vendingbar.gr).
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.
Gaggia Grinder MDF55 (commercial coffee grinder) 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 |
|---|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | 1.2 Nm | Service manual specifies maximum tightening torque of 1.2 Nm for M3 screws used in grinder reassembly (housing/electrical connector fasteners) | Confirmed |
| M4 | not stated | 0.7 mm | not stated | not stated | 2.2 Nm | Service manual specifies maximum tightening torque of 2.2 Nm for M4 screws used in grinder reassembly | Confirmed |
Fitment records and sources
Service manual specifies maximum tightening torque of 1.2 Nm for M3 screws used in grinder reassembly (housing/electrical connector fasteners)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Service manual specifies maximum tightening torque of 2.2 Nm for M4 screws used in grinder reassembly
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). This device also uses M4, so measure each screw rather than assuming they match.
- 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.
Common mix-ups with M3 / M4
- Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
- Many gas-detector and sensor manuals only give a torque spec (e.g. '0.5 N·m max') without repeating the thread size at every mention — the explicit M3 callout is usually only in the accessories/spare-parts table, not the main installation steps.
- Manual gives torque only, not screw length/drive type — verify physically before sourcing replacements.
- On sensors, an "M4" or "M12" marking often describes the sensor barrel or connector thread, not the mounting screw - check which one the datasheet means.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Gaggia Grinder MDF55 (commercial coffee grinder), closest length match first.
- Apple AirPort Extreme internals also M3
- Hammond 1555JL (part SC576-50) Stainless steel enclosure lid/cover screws also M4
- Synology DS923+ NAS also M3
- Fluke RPM4 rack mount kit (P/N 401929) also M4
- SICK sensingCam SEC200/400 bracket kit also M4
- Keystone metric hex PCB standoff also M3
- Dell/HP SFF 2.5-inch drive tray also M3
- HARTING connector insert fixing screw also M3
Questions about Gaggia Grinder MDF55 (commercial coffee grinder) screws
- What size screw does Gaggia Grinder MDF55 (commercial coffee grinder) use?
- M3 for service manual specifies maximum tightening torque of 1.2 Nm for M3 screws used in grinder reassembly (housing/electrical connector fasteners); M4 for service manual specifies maximum tightening torque of 2.2 Nm for M4 screws used in grinder reassembly.
- How long are the screws in Gaggia Grinder MDF55 (commercial coffee grinder)?
- 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 Gaggia Grinder MDF55 (commercial coffee grinder)?
- 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.
- How tight should the M3 screw on Gaggia Grinder MDF55 (commercial coffee grinder) be?
- The source gives 1.2 Nm for service manual specifies maximum tightening torque of 1.2 Nm for M3 screws used in grinder reassembly (housing/electrical connector fasteners).