M2 x 4mm screws — what they fit & where to buy

small Phillips screws holding the heatsink cover down

3-6mm · reported · source

internal bracket, Wi-Fi card and keyboard retention screws

2-4mm · reported · source

Wi-Fi card, M.2 SSD and fan bracket screws

2-4mm · reported · source

internal shield and board screws (JIS Phillips + tri-point), M2-class diameter

2-4mm · reported · source

shell / board screws are tamper-resistant Torx of roughly M2 diameter

3-6mm · reported · source

OEM M2x4 screw sold as an individual gimbal/camera repair part

4mm · confirmed · source

motor mounting screws, standard across most FPV motors

4mm · confirmed · source

20x20 flight-controller stack mounting and 9x9 motor pattern

4-12mm with standoffs · confirmed · source

some third-party HATs and lightweight covers use M2 (the four board holes are M2.5)

4-6mm · reported · source

mainboard, display, fan and sensor bracket screws

4-10mm · reported · source

low-torque decorative trim screws across most OEMs

2-4mm · reported · source

display bezel and controller box screws, not standardised across brands

4-8mm · reported · source

internal PCB and antenna screws (wall-mount screws are much larger)

3-6mm · reported · source

secures the internal battery pack

~3-4mm · reported · source

hinge caps to display and base

~4-5mm · reported · source

small captive screws on the workstation cooler

~3-4mm · reported · source

captive screws on the dual-fan cooling assembly

~3-4mm · reported · source

small screws, often hidden under the rubber feet

~3-5mm · reported · source

holds the NVMe drive to its board standoff

~3-4mm · reported · source

slightly longer for full-length drives on taller standoffs

4mm · reported · source

holds the board's own M.2 cooling cover down

~3-4mm · reported · source

holds the hard drive into its metal caddy bracket

~3-4mm · reported · source

heavy-duty rimless mounts

3-6mm · confirmed · source

grub screw locking the focus or zoom collar to the barrel

2-4mm · reported · source

holds the elevation and windage caps to the scope body

3-6mm · reported · source

holds interchangeable tips onto instrument handles

4-8mm · reported · source

secures key posts to the instrument body

3-6mm · reported · source

the small screws in a cycling computer mount

3-6mm · reported · source

the two small holes on the camera board

~4mm · reported · source

small screws joining plate and PCB in some designs

4-6mm · reported · source

Secures the SSD blade to the standoff inside the bay

3-5mm · reported · source

Battery cover and internal chassis screws, small Torx

4-6mm · reported · source

Internal PCB retention screws

3-5mm · reported · source

Internal shell screws, Torx security

4-6mm · reported · source

Strap and shell fasteners

4-8mm · reported · source

Facial interface mounting screws

4-6mm · reported · source

Shell, board and trigger assembly screws

4-10mm · reported · source

Rail and shell screws, Phillips and Y-tip

4-6mm · reported · source

Long shell screws plus short internal screws

4-14mm · reported · source

Rear case screws under the back cover

3-5mm · reported · source

Fine adjustment and stage clamp screws

4-10mm · reported · source

Internal PCB standoff screws

3-5mm · reported · source

Chassis, dial and trim screws in restoration work

4-10mm · reported

Movement plate and cock screws

2-6mm · reported

Shield plates and internal component screws per the iFixit screw ID guide

3-6mm · reported · source

Shield and board retention screws

3-6mm · reported · source

Torx machine screws around the fan and internal brackets

4-8mm · reported · source

Screw and spacer combo for the M.2 expansion bay

3-4mm · reported · source

Phillips screws for internal brackets

4-6mm · reported · source

JIS/Phillips screws for mainboard and shields; case uses tri-wing

3-5mm · reported · source

JIS screws for internal shield and board

3-4mm · reported · source

Small Phillips screws in the internal frame

3-4mm · reported · source

Board and frame assembly screws

3-5mm · reported · source

Board and driver retention screws

4-6mm · reported · source

Internal bracket screws in slim enclosures

3-4mm · reported · source

Small machine screws inside compact webcams

3-5mm · reported · source

Capsule and shock mount retention

4-6mm · reported · source

Self-tapping mounting screw for micro-size servos

4mm · confirmed · source

Small machine screw fixing the coupler box to the underframe

3-5mm · reported · source

Plate-to-standoff and plate-to-case screws are M2 x 6mm

4-6mm · confirmed · source

Kit lists M2 screws at 2.5, 3, 3.5 and 6mm in black and silver wafer/flat heads

2.5-6mm · confirmed · source

0.40mm pitch, head 3.62-3.98mm, 1.5mm hex key

3-16mm · confirmed · source

Head 3.8mm diameter, 1.2mm high, PH1/PZ1 drive

3-16mm · confirmed · source

Official fastener kit also lists M2 x 4.0mm T5-head screws

4mm · confirmed · source

PCB-to-plate mounting screw (PWM 2.0x4mm, 5mm pan/washer head)

4mm · confirmed · source

Factory case/standoff screw, per vendor screw-size guidance

4mm · reported · source

Guide flag/braid guide set screw

4mm · confirmed · source

High performance PK pickup-guide fixing screw

4mm · confirmed · source

General micro-fastener class used for driver/housing screws in this device class per screw manufacturer catalog (SNSS precision-instrument screw line covers M1–M2.5)

2-12mm · reported · source

GPUCONNECT.COM product page sells 'Replacement Graphics Card Screws GPU VGA Heat Sink Spring' explicitly in M2 and M2.5 sizes for GPU bracket/heatsink retention.

Various with spring, 4-pack · confirmed · source

NovelKeys support article states PCB-to-plate uses M2 x4mm PWM screws, and plate-to-standoffs / plate-to-case use M2 x6mm screws.

4mm and 6mm · confirmed · source

Keeb.io product page sells 'M2 Screws/Standoffs' explicitly labeled M2, in lengths from 3mm to 20mm standoffs and 4mm to 20mm screws, for custom keyboard builds.

3-20mm standoffs, 4-20mm screws · confirmed · source

Screws securing base cover to palm rest, I/O board, system board to palm rest

4mm · high · source

Big-head, nylon-coated screw, quantity 4

4mm · high · source

Repair-forum contributor (calvin83) states 'The M2 screws are used on some of the Nikkors,' with suggested length around 4mm

4mm · reported · source

M2 x 4mm is the ideal screw specification for attaching servo horn to SG90 mini servos

4 · confirmed · source

Headshell cartridge screws commonly supplied in M2 as well as M2.5, with a range of lengths

4-20mm · reported · source

Apple official screw chart lists part 922-9652 as 'Screw, Torx T8, M2.5 x 4.1, H5.2' for display clutch hinge (adjacent M2.5 confirms Apple's use of metric hinge screws down to sub-M3 sizes)

4.1mm · confirmed · source

NBK SNSS miniature screw catalog explicitly lists M2 as a selectable coarse thread nominal alongside M1, M1.4, M1.6, M2.5

2-12mm · confirmed · source

ISO 11381:2016 includes M2.0 x 0.4 among the standard spectacle-frame screw thread sizes

3-6 mm (standard range) · confirmed · source

Rear-shaft option tapped M2, 3.18mm deep

4-5mm · confirmed · source

M2 x 4.0mm T5, 4.6mm head

4.0mm · confirmed · source

Tiny whoop and toothpick-class motors (0603-1102 size) mount with M2 screws; common lengths 4-6mm. Motor screw and prop-lock threads differ — do not mix.

4-6 · likely · source

T5 head, 4.6mm head dia

4.0mm · confirmed · source

Guide states four M2 x L4 screws in lower case

4.0mm · confirmed · source

M2 x 4.0mm T5 screws, 4.6mm head

4mm · confirmed · source

Phillips M2.0 x 2.5 WLAN and WWAN module screws; M2.0 x 2.0 speaker screws (x2); M2.0 x 4.0 battery screws (x4)

2.0-4.0mm · confirmed · source

Phillips M2.0 x 3.0 WLAN screw, M2.0 x 2.5 fingerprint bracket screws (x2), M2.0 x 4.0 board screws (x4)

2.5-4.0mm · confirmed · source

Service guide lists M2 x 2.5, M2 x 3 and M2 x 4 screws for boards and brackets

2.5-4mm · confirmed · source

M2 x 4mm black and silver screws for the lithium battery holder, EVF/handle assembly, heat spreader, heat transfer sheet and case L assembly

4mm · confirmed · source

M2 x 2mm black screws for the LCD backlight knob and small brackets; M2 x 6mm black for the EVF handle

2-6mm · confirmed · source

M2 x 3mm and M2 x 4mm pan head and countersunk screws hold the objective turret retaining ring

3-4mm · confirmed · source

PCB-to-plate uses M2x4mm pan-head screws with 5mm cap; plate-to-standoffs and plate-to-case use M2x6mm screws

M2x4, M2x6 · confirmed · source

Factory case screws are M2 x 4mm, with M2 x 5mm as an alternative

M2x4, M2x5 · confirmed · source

J-GUANG's terminal block torque specification guide explicitly states M2 screw with 0.2 Nm torque used in 2.0mm-2.54mm pitch PCB terminal blocks for signal wiring

M2x4-M2x6 · confirmed · source

Appendix F Series Screw Torque List gives explicit specs: 'M2.0*12', 'M2.0*4', 'M2*4.2+4' for PCMCIA bus, ODD connector, CPU thermal sink

M2x12, M2x4, M2x4.2 · confirmed · source

Service manual for handheld radio disassembly covers chassis/battery-door fastener removal; Kirisun's documented handheld radio service manuals for this class specify M2 metric case screws in their screw/torque tables

M2x4, M2x6 · likely · source

iFixit repair guide for battery replacement on Medtronic 670G insulin pump documents opening the case with small cross-head screws; Medtronic service documentation for this pump chassis specifies M2 metric fasteners for the battery access panel

M2x4 · likely · source

bottom base cover screws (6)

4mm · confirmed · Source: Dell P1425 Service Manual Rev A00

mainboard shielding (2)

4mm · confirmed · Source: ASUS AIO M3700 Service Manual

mainboard removal (9)

4mm · confirmed · Source: ASUS AIO M3700 Service Manual

WLAN module retention screw

4mm · confirmed · Source: ASUS AIO M3700 Service Manual

I/O FFC bracket screws (3)

4mm · confirmed · Source: ASUS AIO M3700 Service Manual

fan cable bracket screw

4mm · confirmed · Source: ASUS AIO M3700 Service Manual

bottom case screws

4mm · confirmed · Source: ASUS ZenBook 13 UX325UA Repair Manual

battery pack retention (4)

4mm · confirmed · Source: MSI MS-15F4 Service Guide

thermal module retention (12)

4mm · confirmed · Source: MSI MS-15F4 Service Guide

internal frame/PCB screw, Samsung part 6001-003313

4mm · confirmed · source

Battery retention (set 2)

4 mm · confirmed · source

Right fan retention

4 mm · confirmed · source

I/O board shield retention

4 mm · confirmed · source

Left fan retention

4 mm · confirmed · source

Type-C bracket retention

4 mm · confirmed · source

Battery and thermal module retention

4 mm · confirmed · source

Thermal module retention

4 mm · confirmed · source

Mainboard retention

4 mm · confirmed · source

Keyboard module to main base

4 mm · confirmed · source

Battery pack retention

4 mm · confirmed · source

Thermal module retention

4 mm · confirmed · source

Base cover, SSD and WLAN screws per service-manual screw list

2-5 mm · confirmed · source

Base cover, SSD and heat sink screws per service-manual screw list

2-5 mm · confirmed · source

battery screws (6x)

4.0mm · confirmed · source

speaker screws (top cover)

4.0mm · confirmed · source

system board and power button board screws

4.0mm · confirmed · source

bottom cover screws (2x)

4.0mm · confirmed · source

Second fastener length in the official kit, 4.6 mm head

4.0 mm · confirmed · source

PCI-SIG M.2 spec defines the module retention screw as M2

2.0-4.2 mm by module thickness · high · source

19x M2x2.0 fine-pitch, 6x M2x2.0 big-hat, 10x M2x2.8 and 2x M2x4.0 screws

2.0-4.0mm · confirmed · source

battery mounting screws (4x), top bracket screws and 7 keyboard screws

4.0mm · confirmed · source

Hinge (bottom) — T5 head, 4.0mm long (official fastener guide)

4.0mm · confirmed · source

camera and small hardware screws

4mm and 8mm · confirmed · source

I/O card — flat-head screw, 4mm long (official Hardware Maintenance Manual screw table)

4mm · confirmed · source

internal FRU screw listed in the official Hardware Maintenance Manual screw tables — small-head, 4mm long

4mm · confirmed · source

Official screw reference page lists M2 x L4 Phillips PH00 screw used in disassembly

4mm · confirmed · source

Hardware Maintenance Manual screw list: M2 x 2 mm flat-head nylon-coated, plus M2 at 2, 2.5, 3, 3.2, 3.5, 8 and 11 mm.

2-11 · confirmed · source

Bottom cover six M2.0 x 4.0; SSD bracket two M2.0 x 2.5; battery six M2.0 x 5.0; WLAN module one M2.0 x 2.5; daughter board two M2.0 x 3.5; each fan three M2.0 x 3.5

2.5-5 mm · confirmed · source

Service guide: touchpad bracket three M2 x 2.5; display panel four M2.0 x 3; heatsink and WLAN M2 x 3.0; SSD M2.0 x 3; speakers and battery M2 x 4.0; fans to top cover M2.0 x 4.5; system board and power button board M2 x 4.0

2.5-4.5 mm · confirmed · source

FRU parts list screw entry "IMS M2X4(H=0.3)"

4 mm · confirmed · source