RED Digital Cinema Matte Box Cage & Side Flags Kit screw size
M2 / M3 · 6 to 8 mm long
RED Digital Cinema Matte Box Cage & Side Flags Kit takes M2 and M3 metric screws in lengths from 6 to 8 mm.
There are 2 separate fitment records for it, including attaches cage couplers between top cage and side cages (M2) and secures cage to matte box (flat screws, hand-tightened) (M3).
2 of the 2 records are marked confirmed, drawn from 1 source (manualsdir.com).
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
RED Digital Cinema Matte Box Cage & Side Flags Kit 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 | 8 mm | 0.4 mm | not stated | not stated | attaches cage couplers between top cage and side cages | Confirmed |
| M3 | 6 mm | 0.5 mm | not stated | not stated | secures cage to matte box (flat screws, hand-tightened) | Confirmed |
Fitment records and sources
attaches cage couplers between top cage and side cages
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
secures cage to matte box (flat screws, hand-tightened)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- If several screws hold the same part, check that they are all the same length before assuming they are.
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M3, so measure each screw rather than assuming they match.
- Pitch: 0.4 mm from one thread crest to the next (25 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 6–8 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2 / M3
- M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
- LED strip clips strip easily — M3x12 into thin plastic should be hand-driven, never with a power driver.
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
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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Questions about RED Digital Cinema Matte Box Cage & Side Flags Kit screws
- What size screw does RED Digital Cinema Matte Box Cage & Side Flags Kit use?
- M2 × 8 mm for attaches cage couplers between top cage and side cages; M3 × 6 mm for secures cage to matte box (flat screws, hand-tightened).
- How long are the screws in RED Digital Cinema Matte Box Cage & Side Flags Kit?
- The records range from 6 to 8 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2 screw?
- 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
- What screwdriver do I need for RED Digital Cinema Matte Box Cage & Side Flags Kit?
- The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
- Can I use an imperial screw instead of M2?
- No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for RED Digital Cinema Matte Box Cage & Side Flags Kit?
- TechSpareWarehouse (our own store) lists M2 x 8mm and M3 x 6mm, which match lengths in the records above.