Shield Sights Dove Tail optic mount screw size
M3 · length not stated in the sources
Shield Sights Dove Tail optic mount takes M3 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for manufacturer's recommended screw torque table explicitly lists 'M3 Screw Torque - 0.8Nm' for the mount's fixing screws.
This entry is marked confirmed and comes from shieldsights.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.
Shield Sights Dove Tail optic mount screw specifications
One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Torque | Where it goes | Status |
|---|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | 0.8 Nm | Manufacturer's recommended screw torque table explicitly lists 'M3 Screw Torque - 0.8Nm' for the mount's fixing screws | Confirmed |
Fitment records and sources
Manufacturer's recommended screw torque table explicitly lists 'M3 Screw Torque - 0.8Nm' for the mount's fixing screws
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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads 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.
Common mix-ups with M3
- 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.
- Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
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Devices whose records share a thread with Shield Sights Dove Tail optic mount, closest length match first.
- 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
- Wooden Camera ARRI ALEXA LF Sharkfin / Zip Box Pro also M3
- Telescope thumb screws for diagonals, adapters and focusers also M3
- Strobe-enhanced microscopy stage (Wenzel Lab open hardware) also M3
- Aimpoint Micro T-1/T-2/H-1/H-2 standard mount screw also M3
- Olympus BH-2 microscope frame also M3
- Panasonic WV-NF5C outdoor camera housing also M3
Questions about Shield Sights Dove Tail optic mount screws
- What size screw does Shield Sights Dove Tail optic mount use?
- M3 for manufacturer's recommended screw torque table explicitly lists 'M3 Screw Torque - 0.8Nm' for the mount's fixing screws.
- How long are the screws in Shield Sights Dove Tail optic mount?
- 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 Shield Sights Dove Tail optic mount?
- 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.
- How tight should the M3 screw on Shield Sights Dove Tail optic mount be?
- The source gives 0.8 Nm for manufacturer's recommended screw torque table explicitly lists 'M3 Screw Torque - 0.8Nm' for the mount's fixing screws.