Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) screw size
M3 · 6 mm long
Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) takes M3 metric screws, 6 mm long.
Where it is used: safety stop socket head cap screws, qty 2.
Head and drive, as the source states them: socket cap head.
This entry is marked confirmed and comes from tripodhead.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.
Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) 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 | Socket cap | not stated | safety stop socket head cap screws, qty 2 | Confirmed |
Fitment records and sources
safety stop socket head cap screws, qty 2
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 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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they 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
- On FPV motors, screw length is safety-critical: one turn too long and the screw crushes the motor windings. Measure arm + base depth, and dry-fit before powering up.
- 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.
-
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 Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com), closest length match first.
- Kurokesu QR-PLATE-20 Arca-Swiss plate also M3 × 6 mm
- Wimberley P-5 camera body plate also M3 × 6 mm
- Camera cage shells (SmallRig-style) also M3 × 6 mm
- Arca-style quick-release plate also M3 × 6 mm
- Gimbal / quick-release plate clamp also M3 × 6 mm
- Meade LX200 Barlow / eyepiece retaining screw also M3 × 6 mm
- Holosun SCS-MOS optic mounting screw (Glock) also M3 × 6 mm
- Aimpoint SM-2001/2007 Micro T1/T2 mount also M3 × 6 mm
Questions about Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) screws
- What size screw does Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com) use?
- M3 × 6 mm for safety stop socket head cap screws, qty 2.
- How long are the screws in Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com)?
- 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 Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com)?
- 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 Really Right Stuff style P-5 Arca-Swiss plate (tripodhead.com)?
- TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.