Juki MF-7923 / MF-7523 industrial machine screw size
M4 · 8 to 25 mm long
The screws used on Juki MF-7923 / MF-7523 industrial machine are M4 in lengths from 8 to 25 mm.
There are 2 separate fitment records for it, including tapping screw ST-4040851-SN (M4) and pan head screw SM-4042501-SC, pitch 0.7 (M4).
Head and drive, as the sources state them: pan head.
2 of the 2 records are marked confirmed, drawn from 1 source (goldstartool.com).
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Juki MF-7923 / MF-7523 industrial machine 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 | 8 mm | 0.7 mm | not stated | not stated | tapping screw ST-4040851-SN | Confirmed |
| M4 | 25 mm | 0.7 mm | Pan head | not stated | pan head screw SM-4042501-SC, pitch 0.7 | Confirmed |
Fitment records and sources
tapping screw ST-4040851-SN
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
pan head screw SM-4042501-SC, pitch 0.7
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- 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: for pan head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 8–25 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- Smart doorbell and lock kits bundle metric machine screws with imperial wood screws in the same bag; the metric ones are rarely labelled.
- Bopla SHR-Z boss screws and Hammond 1591XXF screws look metric but are self-tapping/imperial — don't substitute a machine screw into those bosses.
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 Industrial & Machinery
The same screw also fits
Devices whose records share a thread with Juki MF-7923 / MF-7523 industrial machine, closest length match first.
- Pinball cabinet hardware (EU restorations) also M4 × 8 mm
- Rhea Vendors Luce Publico vending machine also M4 × 8 mm
- Pinball machine fan screw also M4 × 8 mm
- Tuttnauer manual autoclaves also M4 × 8 mm
- Singer Viking Emerald 203 sewing machine also M4 × 8 mm
- Makita GB801 also M4 × 8 mm
- Makita 6095D cordless driver drill also M4 × 25 mm
- Makita TW004G cordless impact wrench also M4 × 25 mm
Questions about Juki MF-7923 / MF-7523 industrial machine screws
- What size screw does Juki MF-7923 / MF-7523 industrial machine use?
- M4 × 8 mm for tapping screw ST-4040851-SN; M4 × 25 mm for pan head screw SM-4042501-SC, pitch 0.7.
- How long are the screws in Juki MF-7923 / MF-7523 industrial machine?
- The records range from 8 to 25 mm depending on the position, so match each screw to its own hole.
- 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 MF-7923 / MF-7523 industrial machine?
- 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.