NEMA 23 stepper motor, 3A variant (Novanta/IMS) screw size
M2 · 4 to 5 mm long
NEMA 23 stepper motor, 3A variant (Novanta/IMS) takes M2 metric screws in lengths from 4 to 5 mm.
Where it is used: rear-shaft option tapped M2, 3.18mm deep.
This entry is marked confirmed and comes from novanta.com.
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
NEMA 23 stepper motor, 3A variant (Novanta/IMS) 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 |
|---|---|---|---|---|---|---|
| M2 | 4–5 mm | 0.4 mm | not stated | not stated | Rear-shaft option tapped M2, 3.18mm deep | Confirmed |
Fitment records and sources
Rear-shaft option tapped M2, 3.18mm deep
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
How to check the screw before you buy
- Into printed plastic, the screw either self-taps or needs a heat-set insert; machine screws straight into plastic strip easily.
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.4 mm from one thread crest to the next (25 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 records span 4–5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2
- Slot car brands also use M2.2 and M2.6 threads that look like M2 but will not interchange - Slot.it M2.2x4.5 motor mount and SCC M2.6x8 body screws are separate sizes.
- M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
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.
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Devices whose records share a thread with NEMA 23 stepper motor, 3A variant (Novanta/IMS), closest length match first.
- NEMA 17 stepper motor (Novanta/IMS) also M2 × 5 mm
- Dell Latitude E4200 also M2 × 4 mm
- HP Chromebook 14 inch 14a-na1000 (second MSG on its page) also M2 × 4.8 mm
- HP EliteBook 820 G2 also M2 × 4.5 mm
- HP Compaq nx7400 also M2 × 4 mm
- Lenovo IdeaPad S340-13IML also M2 × 4.5 mm
- Dell Latitude D510 also M2 × 4 mm
- HP Compaq nw9440 also M2 × 4 mm
Questions about NEMA 23 stepper motor, 3A variant (Novanta/IMS) screws
- What size screw does NEMA 23 stepper motor, 3A variant (Novanta/IMS) use?
- M2 × 4–5 mm for rear-shaft option tapped M2, 3.18mm deep.
- How long are the screws in NEMA 23 stepper motor, 3A variant (Novanta/IMS)?
- The records range from 4 to 5 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2 screw?
- 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
- What screwdriver do I need for NEMA 23 stepper motor, 3A variant (Novanta/IMS)?
- The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
- Can I use an imperial screw instead of M2?
- No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for NEMA 23 stepper motor, 3A variant (Novanta/IMS)?
- TechSpareWarehouse (our own store) lists M2 x 4mm and M2 x 5mm, which match lengths in the records above.