Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box screw size
M4 · 10 mm long
If you are replacing a screw on Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box, the thread is M4, 10 mm long.
It is listed for grindex Mega Inox IOM Manual electrical connection chapter explicitly specifies M4 terminal screws for cable lug connections inside the pump's motor terminal box.
This entry is marked likely and comes from pump-technology.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.
Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box 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 | 10 mm | 0.7 mm | not stated | not stated | Grindex Mega Inox IOM Manual electrical connection chapter explicitly specifies M4 terminal screws for cable lug connections inside the pump's motor terminal box | Likely |
Fitment records and sources
Grindex Mega Inox IOM Manual electrical connection chapter explicitly specifies M4 terminal screws for cable lug connections inside the pump's motor terminal box
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Printers and POS terminals often use self-tapping screws into plastic; re-use the original thread path instead of cutting a new one.
- 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.
- The record states 10 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 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
- Water heater elements use pipe threads (NPSM/NPT), not metric machine screws.
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
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 Printers, POS & Office
The same screw also fits
Devices whose records share a thread with Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box, closest length match first.
- HP Color LaserJet 8500 / 8500N / 8500DN also M4 × 10 mm
- NCR ATM repairing components screw also M4 × 10 mm
- Diebold Opteva ATM cassette screw also M4 × 10 mm
- HP Color LaserJet 8500 2000-sheet input unit also M4 × 10 mm
- NCR 7360 self-checkout Bagwell Upgrade Kit (K112/K114/K124) also M4 × 10 mm
- HP LaserJet 9000/9040/9050 series printer also M4 × 10 mm
- COSEL power supply terminal block also M4 × 10 mm
- Dell P2421DC also M4 × 10 mm
Questions about Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box screws
- What size screw does Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box use?
- M4 × 10 mm for grindex Mega Inox IOM Manual electrical connection chapter explicitly specifies M4 terminal screws for cable lug connections inside the pump's motor terminal box.
- How long are the screws in Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box?
- The record gives 10 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 Grindex Mega Inox submersible pump (water treatment/wastewater pump) terminal box?
- 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.