Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint screw size
M3 · 6 mm long
If you are replacing a screw on Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint, the thread is M3, 6 mm long.
Where it is used: manufacturer mounting instructions explicitly specify M3 x 6mm screws for these compact reflex-sight footprints, also used on archery reflex-sight mounts.
This entry is marked confirmed and comes from 4shooters.com.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint 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 | not stated | not stated | Manufacturer mounting instructions explicitly specify M3 x 6mm screws for these compact reflex-sight footprints, also used on archery reflex-sight mounts | Confirmed |
Fitment records and sources
Manufacturer mounting instructions explicitly specify M3 x 6mm screws for these compact reflex-sight footprints, also used on archery reflex-sight mounts
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Printers and POS terminals often use self-tapping screws into plastic; re-use the original thread path instead of cutting a new one.
- 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads 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
- Eurorack rail thread varies by manufacturer: some tapped M2.5, some M3 — not a single universal standard.
- GoPro's own official Dive Housing user guide does not itself state a metric screw size for the housing body; only third-party accessory manufacturer (INON) manuals explicitly cite M6 screws for their add-on arms/adapters attaching to the housing.
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 Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint, closest length match first.
- Equinox 6200M POS terminal mount (PTS-04-6200) also M3 × 6 mm
- JCM DBV-200 bill validator (P-Tite) also M3 × 6 mm
- Arca-Swiss / GoPro DIY adapters also M3 × 6 mm
- JCM DBV-200 bill validator also M3 × 6 mm
- Diebold Nixdorf ATM (PN 49221808000F-26) also M3 × 6 mm
- HP Color LaserJet 8500 2000-sheet input unit also M3 × 6 mm
- Lexmark T620 laser printer also M3 × 6 mm
- Elo EMV cradle kit, P400 attachment screws also M3 × 6 mm
Questions about Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint screws
- What size screw does Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint use?
- M3 × 6 mm for manufacturer mounting instructions explicitly specify M3 x 6mm screws for these compact reflex-sight footprints, also used on archery reflex-sight mounts.
- How long are the screws in Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint?
- 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 Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint?
- 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 Universal Red Dot Pattern Mounting Plate — Burris Fast Fire 2, Vortex Venom footprint?
- TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.