Takachi EM-series enclosure PCB bosses screw size
M3 · 6 mm long
If you are replacing a screw on Takachi EM-series enclosure PCB bosses, the thread is M3, 6 mm long.
It is listed for self-tapping PCB boss screw range includes M3 for broadcast and AV equipment enclosures.
This entry is marked confirmed and comes from takachi-enclosure.com.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Takachi EM-series enclosure PCB bosses 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 |
|---|---|---|---|---|---|---|
| M3 | 6 mm | 0.5 mm | not stated | not stated | Self-tapping PCB boss screw range includes M3 for broadcast and AV equipment enclosuresself-tapping / thread-forming | Confirmed |
Fitment records and sources
Self-tapping PCB boss screw range includes M3 for broadcast and AV equipment enclosures
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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 6 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 M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
- M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.
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.
-
M3 x 6mm Replacement Screws for XLR Audio Connectors Phillips Wafer Head 50-Pack
$4.99 -
M3 x 6mm Phillips Wafer Head Carbon Steel Machine Screws for XLR Audio Connectors | 50-Pack (Black)
$4.99
-
M3 x 6mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black
$0.10 each · min. 50
-
M3 x 6mm Phillips Wafer Head Screw for Boutique Guitar Pedal Enclosure - Single Replacement Black
$0.10 each · min. 50
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Devices whose records share a thread with Takachi EM-series enclosure PCB bosses, closest length match first.
- Rack blanking panels and front handles also M3 × 6 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M3 × 6 mm
- GCX Barcode Scanner Adapter mounting kit also M3 × 6 mm
- Tektronix RM5 rackmount kit (5/6 Series MSO) also M3 × 6 mm
- UniFi switch / access point wall bracket also M3 × 6 mm
- Eurorack module to rack rail also M3 × 6 mm
- ICY DOCK MB344SP FLEX-FIT Quattro 5.25" bay enclosure also M3 × 6 mm
- PEM self-clinching flush-head stud, sheet-metal enclosures (ATM/kiosk/POS chassis use case) also M3 × 6 mm
Questions about Takachi EM-series enclosure PCB bosses screws
- What size screw does Takachi EM-series enclosure PCB bosses use?
- M3 × 6 mm for self-tapping PCB boss screw range includes M3 for broadcast and AV equipment enclosures.
- How long are the screws in Takachi EM-series enclosure PCB bosses?
- The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Takachi EM-series enclosure PCB bosses?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Takachi EM-series enclosure PCB bosses?
- TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.