ARRI Mini Follow Focus MFF-2 / related follow-focus hardware screw size
M2.5 · 8 mm long
ARRI Mini Follow Focus MFF-2 / related follow-focus hardware takes M2.5 metric screws, 8 mm long.
Where it is used: DIN 915 M2.5x8mm dog-point socket grub screws are a listed stock size used in cine follow-focus set-screw applications (confirmed as a standard grub screw size stocked for this class of gear, not a specific ARRI part page).
Head and drive, as the source states them: set screw (headless) head.
This entry is marked reported and comes from vital-parts.co.uk.
An M2.5 screw is 2.5 mm in diameter with a 0.45 mm pitch, tapped with a 2.05 mm drill; 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.
ARRI Mini Follow Focus MFF-2 / related follow-focus hardware 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 | 8 mm | 0.45 mm | Set screw (headless) | not stated | DIN 915 M2.5x8mm dog-point socket grub screws are a listed stock size used in cine follow-focus set-screw applications (confirmed as a standard grub screw size stocked for this class of gear, not a specific ARRI part page) | Reported |
Fitment records and sources
DIN 915 M2.5x8mm dog-point socket grub screws are a listed stock size used in cine follow-focus set-screw applications (confirmed as a standard grub screw size stocked for this class of gear, not a specific ARRI part page)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Stage and rack gear mixes metric with #10-32 rack screws, so check before swapping.
- Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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 set screw (headless) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 8 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 M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 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
- NI's other DAQ SCSI jackscrews use inch-standard 2-56 UNC threads, not metric — M2.5 applies only to the specific jacksocket kit listed.
- M2 and M2.5 are both marketed for turntable headshells; buyers must check which their specific cartridge/tonearm brand uses.
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 8mm Screws for Raspberry Pi 5 Case and PoE HAT 10-Pack Black
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25x M2.5 x 8mm Phillips Screws for Acer Nitro 5 LCD Hinge Assembly
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M2.5 x 8mm Black Wafer Head Screws for Lenovo ThinkPad X131e Chromebook Palmrest Replacement – 10-Pack Black
$4.99Choose size
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The same screw also fits
Devices whose records share a thread with ARRI Mini Follow Focus MFF-2 / related follow-focus hardware, closest length match first.
- NBK SSCZS miniature captive screw for precision instruments also M2.5 × 8 mm
- Lenovo ThinkPad 765L also M2.5 × 8 mm
- Lenovo ThinkPad X41 also M2.5 × 8 mm
- Dell Inspiron 17 7779 2-in-1 also M2.5 × 8 mm
- HP 17-x000 (Touch) also M2.5 × 8 mm
- Lenovo G510s Touch also M2.5 × 8 mm
- Acer Emachines G630 also M2.5 × 8 mm
- HP Pavilion DV9200 also M2.5 × 8 mm
Questions about ARRI Mini Follow Focus MFF-2 / related follow-focus hardware screws
- What size screw does ARRI Mini Follow Focus MFF-2 / related follow-focus hardware use?
- M2.5 × 8 mm for DIN 915 M2.5x8mm dog-point socket grub screws are a listed stock size used in cine follow-focus set-screw applications (confirmed as a standard grub screw size stocked for this class of gear, not a specific ARRI part page).
- How long are the screws in ARRI Mini Follow Focus MFF-2 / related follow-focus hardware?
- The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 ARRI Mini Follow Focus MFF-2 / related follow-focus hardware?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take 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 ARRI Mini Follow Focus MFF-2 / related follow-focus hardware?
- TechSpareWarehouse (our own store) lists M2.5 x 8mm, which matches the length in the records above.