NEMA 17 stepper motor rear shaft cover (Novanta) screw size
M2 · 5.1 mm long
Our records put NEMA 17 stepper motor rear shaft cover (Novanta) on M2 screws, 5.1 mm long.
The record covers two rear cover mounting holes, 5.1 mm minimum depth.
This entry is marked confirmed and comes from novanta.com.
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
NEMA 17 stepper motor rear shaft cover (Novanta) 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 | 5.1 mm | 0.4 mm | not stated | not stated | Two rear cover mounting holes, 5.1 mm minimum depth | Confirmed |
Fitment records and sources
Two rear cover mounting holes, 5.1 mm minimum depth
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
How to check the screw before you buy
- Check the strength class stamped on the head (8.8, 10.9, A2-70) and replace like for like.
- 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 record states 5.1 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 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 17 stepper motor rear shaft cover (Novanta), closest length match first.
- Lenovo ThinkPad X200 Tablet screw kit also M2 × 5.1 mm
- Valve Index controller (Knuckles) also M2 × 5.1 mm
- Woodwind post-to-body mounting also M2 × 5.1 mm
- Kirisun T60/T65 handheld two-way radio chassis screws also M2 × 5.1 mm
- Meta Quest 2 controller also M2 × 5.1 mm
- Keyboard switch plate to PCB also M2 × 5.1 mm
- Spectacle frame temple/nose-pad screws (ISO 11381 standard) also M2 × 5.1 mm
- Screw-in stabilizers (Cherry-style) also M2 × 5.1 mm
Questions about NEMA 17 stepper motor rear shaft cover (Novanta) screws
- What size screw does NEMA 17 stepper motor rear shaft cover (Novanta) use?
- M2 × 5.1 mm for two rear cover mounting holes, 5.1 mm minimum depth.
- How long are the screws in NEMA 17 stepper motor rear shaft cover (Novanta)?
- The record gives 5.1 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 17 stepper motor rear shaft cover (Novanta)?
- 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 17 stepper motor rear shaft cover (Novanta)?
- TechSpareWarehouse (our own store) lists M2 x 5mm, which matches the length in the records above.