DIN 912 socket-head cap screw screw size
M1.6 / M2 / M2.5 / M3 / M4 / M5 / M6 · 2 to 60 mm long
If you are replacing a screw on DIN 912 socket-head cap screw, the thread is M1.6, M2, M2.5, M3, M4, M5 and M6 in lengths from 2 to 60 mm.
There are 7 separate fitment records for it, including 0.35mm pitch, head diameter from 2.86mm (M1.6), 0.40mm pitch, head 3.62-3.98mm, 1.5mm hex key (M2) and 0.45mm pitch, head 4.32-4.68mm, 2mm hex key (M2.5), plus 4 more in the table below.
Head and drive, as the sources state them: Hex socket (Allen) drive.
7 of the 7 records are marked confirmed, drawn from 2 sources (boltport.com and tengtoolsusa.com).
An M1.6 screw is 1.6 mm in diameter with a 0.35 mm pitch, tapped with a 1.25 mm drill; imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
DIN 912 socket-head cap screw 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 |
|---|---|---|---|---|---|---|
| M1.6 | 2–12 mm | 0.35 mm | not stated | not stated | 0.35mm pitch, head diameter from 2.86mm | Confirmed |
| M2 | 3–16 mm | 0.4 mm | not stated | Hex socket (Allen) | 0.40mm pitch, head 3.62-3.98mm, 1.5mm hex key | Confirmed |
| M2.5 | 4–20 mm | 0.45 mm | not stated | Hex socket (Allen) | 0.45mm pitch, head 4.32-4.68mm, 2mm hex key | Confirmed |
| M3 | 4–30 mm | 0.5 mm | not stated | Hex socket (Allen) | 0.50mm pitch, head 5.32-5.68mm, 2.5mm hex key | Confirmed |
| M4 | 5–40 mm | 0.7 mm | not stated | Hex socket (Allen) | 0.70mm pitch, head 6.78-7.22mm, 3mm hex key | Confirmed |
| M5 | 6–50 mm | 0.8 mm | not stated | Hex socket (Allen) | 0.80mm pitch, head 8.28-8.72mm, 4mm hex key | Confirmed |
| M6 | 8–60 mm | 1 mm | not stated | Hex socket (Allen) | 1.00mm pitch, head 9.78-10.22mm, 5mm hex key | Confirmed |
Fitment records and sources
0.35mm pitch, head diameter from 2.86mm
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
0.40mm pitch, head 3.62-3.98mm, 1.5mm hex key
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
0.45mm pitch, head 4.32-4.68mm, 2mm hex key
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
0.50mm pitch, head 5.32-5.68mm, 2.5mm hex key
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
0.70mm pitch, head 6.78-7.22mm, 3mm hex key
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
0.80mm pitch, head 8.28-8.72mm, 4mm hex key
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
1.00mm pitch, head 9.78-10.22mm, 5mm hex key
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- Diameter: across the threads an M1.6 screw measures about 1.6 mm with calipers (usually a hair under). This device also uses M2 / M2.5 / M3 / M4 / M5 / M6, so measure each screw rather than assuming they match.
- Pitch: 0.35 mm from one thread crest to the next (28.57 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 2–60 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Hex socket (Allen) drive. For comparison, standard M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M1.6 is about 12-20 N·cm into metal threads and 6-10 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.6 / M2 / M2.5 / M3 / M4 / M5 / M6
- Apple's own part naming mixes thread (M1.6) with head diameter (H3.0/H3.2) — read the full part description carefully to avoid conflating head size with thread size.
- DJI airframes mix 1.5mm/2mm hex and Phillips drives at similar diameters — check the drive type, not just the thread.
- A hex key size does not identify a thread: a 2.5mm key fits M3 socket caps, and imperial screws share the same drive shapes.
- Eurorack is a strong known case with two competing metric standards (M2.5 for Vector rails, M3 for Schroff/DIN-style and 3U threaded rails); mixing rail types requires matching screw/nut thread.
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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M1.6 x 3mm Screws Compatible with Dell XPS 13 9340 Keyboard 10-Pack Black
$4.99 -
M1.6 x 3mm Screws for Dell XPS 13 9340 System Board Replacement 10-Pack Black
$4.99
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M1.6 x 4mm Screws Compatible with Dell XPS 14 9440 Battery System Board 10-Pack
$4.99 -
M1.6 x 4mm Phillips Wafer Head Micro Screws LCD Shell Repair 10-Pack
$4.99
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M2 x 3mm Screws for Dell XPS 13 9340 Base Cover SSD Shield 10-Pack Black
$4.99 -
10x M2 x 3mm Phillips Screws for Lenovo ThinkPad X131e Chromebook WiFi SSD
$4.99
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M4 x 20mm Black Wafer Head Pan Screw Screws for Honda Accord 1980-1989 & Civic 1978-1979 (93500-04020) – 10-Pack Replacement
$5.99Choose size -
M4 x 20mm Black Wafer Head Phillips Machine Screws (8mm Thin Flat Head) for Monitor VESA Brackets & PC Cases
From $5.99Choose size
More in Standards & References
The same screw also fits
Devices whose records share a thread with DIN 912 socket-head cap screw, closest length match first.
- M.2 (NGFF) SSD module retention also M2 × 3–4.2 mm
- DIN 965 / ISO 7046 countersunk Phillips screw also M1.6 × 2–10 mm
- HBM VKK1-4A load cell junction box also M4 × 20 mm
- CubeSat Kit solar panel clips and chassis also M3 × 4–5 mm
- Micro servo horn/arm screw also M2 × 4 mm
- NBK cleanroom/semiconductor vented socket head cap screw (SVSHT-M3-SD) also M3 × 6–10 mm
- Balisong / butterfly knife pivot (aftermarket, ISO 14583 pan head) also M2.5 × 5 mm
- 2.5in SATA SSD / HDD also M3 × 4 mm
Questions about DIN 912 socket-head cap screw screws
- What size screw does DIN 912 socket-head cap screw use?
- M1.6 × 2–12 mm for 0.35mm pitch, head diameter from 2.86mm; M2 × 3–16 mm for 0.40mm pitch, head 3.62-3.98mm, 1.5mm hex key; M2.5 × 4–20 mm for 0.45mm pitch, head 4.32-4.68mm, 2mm hex key; M3 × 4–30 mm for 0.50mm pitch, head 5.32-5.68mm, 2.5mm hex key; M4 × 5–40 mm for 0.70mm pitch, head 6.78-7.22mm, 3mm hex key; M5 × 6–50 mm for 0.80mm pitch, head 8.28-8.72mm, 4mm hex key; M6 × 8–60 mm for 1.00mm pitch, head 9.78-10.22mm, 5mm hex key.
- How long are the screws in DIN 912 socket-head cap screw?
- The records range from 2 to 60 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.6 screw?
- 0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.
- What screwdriver do I need for DIN 912 socket-head cap screw?
- The source lists a Hex socket (Allen) drive. Standard M1.6 heads otherwise take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Can I use an imperial screw instead of M1.6?
- No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for DIN 912 socket-head cap screw?
- TechSpareWarehouse (our own store) lists M1.6 x 3mm, M1.6 x 4mm and M2 x 3mm, which match lengths in the records above.