Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro screw size
M3 · length not stated in the sources
If you are replacing a screw on Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro, the thread is M3. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for M3 replacement thumbscrew for 24V battery bracket and clamp-on matte box back.
Head and drive, as the source states them: thumb screw (knurled) head.
This entry is marked confirmed and comes from woodencamera.com.
M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro 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 | not stated | 0.5 mm | Thumb screw (knurled) | not stated | M3 replacement thumbscrew for 24V battery bracket and clamp-on matte box back | Confirmed |
Fitment records and sources
M3 replacement thumbscrew for 24V battery bracket and clamp-on matte box back
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
- 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 thumb screw (knurled) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- 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
- Suunto dive computer service manuals reference strap pins and battery compartment springs but do not explicitly cite a metric screw thread size in the sections reviewed; do not infer M2/M2.5 fitment for Suunto dive computer straps without direct confirmation.
- Camera tripod and Arca threads are imperial 1/4-20 and 3/8-16, never M3.
More in Cameras & Optics
The same screw also fits
Devices whose records share a thread with Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro, closest length match first.
- Shield Sights Dove Tail optic mount also M3
- Celestron C11 Schmidt-Cassegrain OTA secondary mirror collimation screws also M3
- Glock MOS adapter plate to slide (Docter/Meopta/Insight/Vortex/Burris footprint) also M3
- Strobe-enhanced microscopy stage (Wenzel Lab open hardware) also M3
- Telescope thumb screws for diagonals, adapters and focusers also M3
- Wimberley AP-640 replacement lens foot also M3
- Olympus BH-2 microscope frame also M3
- Aimpoint Micro T-1/T-2/H-1/H-2 standard mount screw also M3
Questions about Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro screws
- What size screw does Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro use?
- M3 for M3 replacement thumbscrew for 24V battery bracket and clamp-on matte box back.
- How long are the screws in Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro?
- 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.