How long are the screws in Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?

The records range from 7.5 to 10 mm depending on the position, so match each screw to its own hole.

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 Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?

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 Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?

TechSpareWarehouse (our own store) lists M3 x 8mm and M3 x 10mm, which match lengths in the records above.

Airsoft red dot sight mounting screw set (Laylax/Quintes Sence) screw size

M3 · 7.5 to 10 mm long

If you are replacing a screw on Airsoft red dot sight mounting screw set (Laylax/Quintes Sence), the thread is M3 in lengths from 7.5 to 10 mm.

It is listed for 'M3 Flat Head Screw Set... Includes a set of 2 each: M3x7.5 / M3x8 / M3x8.5 / M3x9 / M3x10, Design for Fitting Various Optics Securely'.

Head and drive, as the source states them: flat / countersunk head.

This entry is marked confirmed and comes from redwolfairsoft.com.

For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Airsoft red dot sight mounting screw set (Laylax/Quintes Sence) 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	7.5–10 mm	0.5 mm	Flat / countersunk	not stated	'M3 Flat Head Screw Set... Includes a set of 2 each: M3x7.5 / M3x8 / M3x8.5 / M3x9 / M3x10, Design for Fitting Various Optics Securely'	Confirmed

Fitment records and sources

M37.5-10mmconfirmed

'M3 Flat Head Screw Set... Includes a set of 2 each: M3x7.5 / M3x8 / M3x8.5 / M3x9 / M3x10, Design for Fitting Various Optics Securely'

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

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: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
The records span 7.5–10 mm, which means different positions take different lengths — match each hole to its own screw.
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

Part numbers can embed a thread code (e.g. ifm fibre fittings with 'M3') that refers to a fitting thread, not a chassis screw.
Thor Zone Nanoq S case mixes metric M3 (various lengths: 4, 5, 6, 10, 13, 20mm) and imperial #6-32 UNC fasteners across the same build, so builders must sort hardware carefully rather than assuming an all-metric kit.

Pitch gauge · Screw size finder · Torque guide

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 8mm Screws for Leather Spike Attachments Guitar Straps 10-Pack $4.99
M3 x 8mm Phillips Wafer Head Screw for SLA Resin 3D Printer VAT Film - Single Replacement Black $0.10 each · min. 50
M3 x 10mm Phillips Wafer Head Screw for Sim Racing Wheel Paddle Shifter - Single Replacement Black $0.10 each · min. 50
M3 x 10mm Phillips Wafer Head Screw for RC Car/Truck Chassis Mount - Single Replacement Black $0.10 each · min. 50
M3 x 8mm Phillips Flat Head Countersunk Machine Screws Zinc Silver 100-Pack for RC & 3D Printers $9.99
M3 x 8mm Phillips Flat Head Countersunk Machine Screws Zinc Silver 10-Pack for RC & 3D Printers $4.99
M3 x 10mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black $0.10 each · min. 50

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The same screw also fits

Devices whose records share a thread with Airsoft red dot sight mounting screw set (Laylax/Quintes Sence), closest length match first.

Universal Red Dot Pattern Mounting Plate (fits Vortex Viper, Burris Fast Fire 3, UTG Reflex Micro Dot, TruGlo Tru-Tec, Crimson Trace CTS-1250, Springfield Dragonfly) also M3 × 8 mm
Meade LX200 Barlow / eyepiece retaining screw also M3 × 7.5–8 mm
Wooden Camera 153200 SSD Guard (RED SCARLET) also M3 × 8 mm
Celestron C6 Schmidt-Cassegrain OTA secondary mirror collimation screws also M3 × 10 mm
Gimbal / quick-release plate clamp also M3 × 7.5–10 mm
Celestron collimation screws, C5/C6/C8 SCT optical tubes also M3 × 8–10 mm
Celestron C8 Schmidt-Cassegrain OTA secondary mirror collimation screws also M3 × 8 mm
Telescope metric thumb screw for telescope parts also M3 × 8 mm

Questions about Airsoft red dot sight mounting screw set (Laylax/Quintes Sence) screws

What size screw does Airsoft red dot sight mounting screw set (Laylax/Quintes Sence) use?: M3 × 7.5–10 mm for 'M3 Flat Head Screw Set... Includes a set of 2 each: M3x7.5 / M3x8 / M3x8.5 / M3x9 / M3x10, Design for Fitting Various Optics Securely'.
How long are the screws in Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?: The records range from 7.5 to 10 mm depending on the position, so match each screw to its own hole.
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 Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?: 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 Airsoft red dot sight mounting screw set (Laylax/Quintes Sence)?: TechSpareWarehouse (our own store) lists M3 x 8mm and M3 x 10mm, which match lengths in the records above.

Heads up: shipping delay