Kurokesu QR-PLATE-20 Arca-Swiss plate screw size
M2.5 / M3 · 5 to 6 mm long
Our records put Kurokesu QR-PLATE-20 Arca-Swiss plate on M2.5 and M3 screws in lengths from 5 to 6 mm.
There are 4 separate fitment records for it, including DIN912 socket cap screw supplied with plate (M2.5), secondary mounting screw (DIN 912 socket head) (M2.5) and DIN912 socket cap screws supplied with plate (x2) (M3), plus 1 more in the table below.
Head and drive, as the sources state them: socket cap head and Hex socket (Allen) drive.
4 of the 4 records are marked confirmed, drawn from 1 source (kurokesu.com).
For reference, M2.5 is 2.5 mm across the threads at 0.45 mm pitch. The imperial size people confuse it with: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
Kurokesu QR-PLATE-20 Arca-Swiss plate 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 | 5 mm | 0.45 mm | Socket cap | Hex socket (Allen) | DIN912 socket cap screw supplied with plate | Confirmed |
| M2.5 | 5 mm | 0.45 mm | Socket cap | not stated | Secondary mounting screw (DIN 912 socket head) | Confirmed |
| M3 | 6 mm | 0.5 mm | Socket cap | Hex socket (Allen) | DIN912 socket cap screws supplied with plate (x2) | Confirmed |
| M3 | 6 mm | 0.5 mm | Socket cap | not stated | Mount plate to camera body screws (DIN 912 socket head) | Confirmed |
Fitment records and sources
DIN912 socket cap screw supplied with plate
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Secondary mounting screw (DIN 912 socket head)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
DIN912 socket cap screws supplied with plate (x2)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Mount plate to camera body screws (DIN 912 socket head)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Do not confuse metric mounting screws with the 1/4-20 or 3/8-16 tripod threads that cameras and clamps also carry.
- Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). This device also uses M3, so measure each screw rather than assuming they match.
- Pitch: 0.45 mm from one thread crest to the next (22.22 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 5–6 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 M2.5 heads take PH1 (Phillips) or T8 (Torx), or a 2 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2.5 / M3
- Projector optics and fan screws often step down to M2.5 while the outer covers use M3 - do not reuse cover screws inside the light engine.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
- Camera tripod and Arca threads are imperial 1/4-20 and 3/8-16, never M3.
- Camera and tripod mounting threads themselves are imperial 1/4in-20 or 3/8in-16 — the metric M2-M4 screws in rig kits are only for the accessory hardware, not the tripod mount.
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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M2.5 x 5mm Screws Compatible with Dell XPS 14 9440 Display Assembly 10-Pack
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M2.5 x 5mm Phillips Wafer Head Screw for Action Camera Protective Housing - Pack of 50 Black
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M3 x 6mm Replacement Screws for XLR Audio Connectors Phillips Wafer Head 50-Pack
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M3 x 6mm Phillips Wafer Head Carbon Steel Machine Screws for XLR Audio Connectors | 50-Pack (Black)
$4.99
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M3 x 6mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black
$0.10 each · min. 50
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M3 x 6mm Phillips Wafer Head Screw for Boutique Guitar Pedal Enclosure - Single Replacement Black
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Dell Inspiron 15 3520 Replacement Screws Sold Individually – M2 x 3mm, M2 x 5mm, M2.5 x 5mm, M3 x 3mm Phillips Wafer Head, Black
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Dell Latitude 5430 Replacement Screws Sold Individually – M2 x 2.5mm, M2 x 3mm, M2 x 5mm, M2.5 x 5mm Phillips Wafer Head, Black
$0.10Choose size
More in Cameras & Optics
The same screw also fits
Devices whose records share a thread with Kurokesu QR-PLATE-20 Arca-Swiss plate, closest length match first.
- Wimberley P-5 camera body plate also M3 × 6 mm
- Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) also M3 × 6 mm
- Camera cage shells (SmallRig-style) also M3 × 6 mm
- Camera cages & rigs also M2.5 × 5 mm
- Arca-style quick-release plate also M3 × 6 mm
- Microscope objective turret also M2.5 × 5 mm
- Gimbal / quick-release plate clamp also M3 × 6 mm
- Meade LX200 Barlow / eyepiece retaining screw also M3 × 6 mm
Questions about Kurokesu QR-PLATE-20 Arca-Swiss plate screws
- What size screw does Kurokesu QR-PLATE-20 Arca-Swiss plate use?
- M2.5 × 5 mm for DIN912 socket cap screw supplied with plate; M2.5 × 5 mm for secondary mounting screw (DIN 912 socket head); M3 × 6 mm for DIN912 socket cap screws supplied with plate (x2); M3 × 6 mm for mount plate to camera body screws (DIN 912 socket head).
- How long are the screws in Kurokesu QR-PLATE-20 Arca-Swiss plate?
- The records range from 5 to 6 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for Kurokesu QR-PLATE-20 Arca-Swiss plate?
- The source lists a Hex socket (Allen) drive. Standard M2.5 heads otherwise take PH1 (Phillips) or T8 (Torx), or a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Kurokesu QR-PLATE-20 Arca-Swiss plate?
- TechSpareWarehouse (our own store) lists M2.5 x 5mm and M3 x 6mm, which match lengths in the records above.