Juki industrial sewing machines screw size
M4 · length not stated in the sources
Juki industrial sewing machines takes M4 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers genuine needle plate screw.
This entry is marked confirmed and comes from konsew.co.uk.
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.
Juki industrial sewing machines 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 | genuine needle plate screw | Confirmed |
Fitment records and sources
genuine needle plate screw
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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 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).
- Pinball machines are historically imperial (UNC/UNF). Metric M4 shows up mainly in specific parts like cooling fans or in European rebuilds.
More in Industrial & Machinery
ABB ACS580 motor terminal box / cable glandsABB ACS580 terminal hardware (frames R3-R5)ABB random-wound motor terminal boxes (ACS580 drive systems)Allen-Bradley ControlLogix 1756-A chassisAngle grinder gear housingBianchi / Nuova Simonelli / Rheavendors / Saeco vending machineCircular saw blade guard pivotContender Planetary Mixer MXP004/MXP005 (commercial bakery mixer) electrical diagram terminal screwsCordless drill housing shellsCOSEL power supply terminal block (used in industrial/pump/water-treatment control panels)Datalogic DS2400 fixed-mount barcode readerDeWalt D51430 / D51431 pneumatic nailer
Browse all 113 in Industrial & Machinery →The same screw also fits
Devices whose records share a thread with Juki industrial sewing machines, closest length match first.
- Milwaukee magnetic drill press (54-46-0421R) also M4
- Johnson Controls F4-CG application controller also M4
- Pinball cabinet hardware (EU restorations) also M4
- Singer 4423 / Necchi / Bernette / EverSewn sewing machines also M4
- Rhea Vendors Luce Publico vending machine also M4
- Juki MF-7923 / MF-7523 industrial machine also M4
- Ryobi RY40001B 40V power head also M4
- IBE KL125PR Spiral Mixer (commercial bakery dough mixer) electrical panel also M4
Questions about Juki industrial sewing machines screws
- What size screw does Juki industrial sewing machines use?
- M4 for genuine needle plate screw.
- How long are the screws in Juki industrial sewing machines?
- 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 Juki industrial sewing machines?
- 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.