M3 x 10mm screws — what they fit & where to buy

some cases and AIO radiators use M3 into threaded fan corners (most fans are 6-32 self-tapping)

10-12mm, 25-30mm through a radiator stack · confirmed · source

many redesign around M3 standoffs for easier sourcing (the board itself is M2.5)

4-6mm screws with 6-11mm standoffs · reported · source

fan shrouds, X-carriage and small brackets (frame joints are M5 into T-nuts)

6-16mm · confirmed · source

extruder body, idler and Bondtech gear assembly are M3 throughout

10-40mm (idler M3x40, body M3x10-18) · confirmed · source

heater block clamp, fan shroud, and headless grub screws

3-4mm grub, 6-10mm shroud · confirmed · source

light-duty attachments on 2020 profile (structural joints use M5)

6-16mm · confirmed · source

microswitch, sensor and cable-chain brackets on extrusion frames

6-10mm · reported · source

the 30.5x30.5mm and 20x20mm stack patterns are M3

6-10mm direct, 25-35mm nylon standoffs · confirmed · source

arm-to-centre-plate bolts

8-16mm by plate stack · reported · source

servo horns, ESC mounts and body posts

6-12mm · reported · source

3D-printed and third-party adapters secure the mount tab with M3

6-10mm · reported · source

driver boxes, PIR sensors, desk power modules and USB hub inserts

5-12mm · reported · source

secures the camera plate in a gimbal or cage clamp

6-10mm · reported · source

attaches monitor arms, mic mounts and handles to a cage

6-16mm · reported · source

joins the plastic housing halves

6-12mm · reported · source

holds the handle nut retainer plate on baitcasters

3-10mm · confirmed · source

holds the reel side plates and frame together

6-12mm · reported · source

tightens the handlebar clamp on GPS mounts

10-20mm · reported · source

interior light lens and shelf supports

6-10mm · reported · source

latch mechanism and hinge plate

6-10mm · reported · source

HEPA filter cap and battery cover on stick vacuums

6-10mm · reported · source

front panel and buttons

6-10mm · reported · source

holds the variable-speed trigger in the housing

8-14mm · reported · source

bolts the stepper to its frame bracket

8-14mm · confirmed · source

adds rigidity when stacking shields

8-11mm · reported · source

structural screws joining channel and plate parts

8-25mm · reported · source

frame, gantry and toolhead assembly screws

6-40mm by part · reported · source

holds the filament unit housing together

8-16mm · reported · source

hotend and fan shroud mounting

10-40mm · confirmed · source

frame, Y-carriage and extruder fasteners

10-45mm · confirmed · source

most printed mounts, toolhead and panel screws

6-30mm · confirmed · source

slide-in nuts for the 6mm slot on 20x20 profile

6-16mm screws · confirmed · source

four tapped holes, 31mm bolt spacing, 4.5mm min depth

6-10mm · confirmed · source

countersunk bolts fixing the rail to a gantry plate

8-10mm countersunk · reported · source

secures the device to its mounting plate

6-10mm · reported · source

case assembly screws on router and switch enclosures

6-12mm · reported · source

holds the PCB onto brass or plastic standoffs

6-10mm · reported · source

rear panel and amplifier module mounting

10-20mm · reported · source

stompbox lids, jack plates and internal PCB mounting

6-10mm · reported · source

M3 metric option for the same rail-mount screw range

10mm · confirmed · source

Small trim panel and dash bracket fasteners on most makes

8-12mm · reported

Motor-to-mount screws on planes and multirotors

8-16mm · reported

Motion and contact sensor mounting brackets

6-10mm · reported

Driver and PCB standoffs inside sign boxes

6-10mm · reported

Build guide parts list uses M3/M4 fasteners for internal mounts

8-20mm · reported · source

Joystick and button panel mounting screws

8-16mm · reported · source

Turret and stage mounting screws

6-12mm · reported · source

Teardown photos show small machine screws holding chassis and humidifier

8-14mm · reported · source

Disassembly writeup shows small Phillips machine screws on housing and blower

8-12mm · reported · source

Service manual details internal chassis fasteners

6-16mm · reported · source

Stainless screws joining handles and ratchets

4-10mm · reported

Tray rack and instrument holder screws, stainless

6-16mm · reported

Metric replacements used in European restorations

6-12mm · reported · source

Larger chassis screws visible in the teardown

6-10mm · reported · source

Power supply bracket retention, Torx

8-10mm · reported · source

Shell and shield assembly screws

8-12mm · reported · source

Torx/Phillips screws on internal driver mounts

6-10mm · reported · source

Chassis and driver mounts inside soundbars

8-14mm · reported

Board and antenna mounting screws

6-10mm · reported · source

Shield and board mounting screws

6-10mm · reported · source

Enclosure assembly screws

8-12mm · reported · source

Case and board screws

8-10mm · reported · source

Case and board mounting screws

8-10mm · reported · source

Self-tapping and machine screws for case assembly

8-12mm · reported · source

Chassis and drive tray assembly

6-10mm · reported · source

Case and board assembly screws

6-10mm · reported · source

Self-tapping screws in the internal frame

10-16mm · reported · source

Structural screws in the dash and stem assembly

10-16mm · reported · source

M3 anti-vibration standoff screw (M3x7+4.5) for F3/F4/F7 stacks

7-16mm · confirmed · source

Arm-to-frame bolts and standoffs on 5-inch race/freestyle frames

6-25mm · reported · source

M3 for brackets, M5 for T-slot on C-Beam/V-Slot builds

6-16mm · reported · source

BOM lists M3x6/12/16/20/30 SHCS and BHCS throughout

6-30mm · confirmed · source

Official spares kit is predominantly M3 sizes

4-20mm · reported · source

Creality/Prusa/Voron hotend and extruder bolts are M3

8-20mm · reported · source

Official mechanical drawing shows M3-class mounting holes

6-10mm · reported · source

Mechanical drawing places M3-class holes

6-10mm · reported · source

Cosmetic front-panel attachment uses M3 or M4

6-10mm · reported · source

Standard Eurorack panel screw into rails is M3

6-10mm · confirmed · source

Panel-mounted jack and pot hardware uses metric M3-class brackets

6-10mm · reported · source

M3 button heads widely used in enclosures and extrusion frames

6-16mm · reported · source

Bracket-to-case attachment commonly M3

6-12mm · reported · source

Fine-thread screw and post nut kit for Gentex-style NVG bracket mounts

8-14mm · reported · source

Double-sided 50-ohm and 75-ohm 12G BNC bulkhead connectors with M3 tapped mounting holes

6-10mm · confirmed · source

M3 thread-forming self-tapping screws are the common choice for plastic POS, kiosk and instrument housings

8-10mm · reported

0.50mm pitch, head 5.32-5.68mm, 2.5mm hex key

4-30mm · confirmed · source

Head 5.6mm diameter, 1.65mm high

4-30mm · confirmed · source

ISO 14581 covers M1.6-M10 Torx countersunk screws — the profile behind many laptop and device screws

4-20mm · reported · source

M3 machine screws from M3x4 to M3x40 listed by part code in the official Prusa cheatsheet

4-40mm · confirmed · source

secondary mirror collimation screws, thread spec M3 x 0.5

8-10mm · confirmed · source

Product line explicitly specified with 'M (Coarse) Nominal of Thread: M3' for vacuum/cleanroom/semiconductor fixture use, titanium, lengths 6/8/10mm

6-10mm · confirmed · source

Spec table explicitly lists 'M (Coarse) Nominal of Thread: M3' for chemical-polished cleanroom fastener, lengths 5-16mm

5-16mm · confirmed · source

OEM part 330920-15-01: "SCREW,FH,PHL,M3X10,DIN 965A,SS" listed on Fresenius/PartsSource catalog for the 2008 Series hemodialysis machine

10mm · confirmed · source

Ant-Supplies UK sells 'Replacement Rail and Scope Mount Screws - M3 M4 Metric Thread Torx' explicitly stating 'Thread type ~ metric (M3 or M4)' with 10mm thread length, for scope/rail mounts

10mm · confirmed · source

Assembly manual specifies M3x25mm screws for frame mounting and M3x10mm screws for Z-stage assembly, plus M3 nuts and M3 locknuts throughout the build

25 and 10mm · confirmed · source

M3 x 10 Screw with Washer used internally in the bill acceptor transport assembly

10mm · high · source

Riser-bracket countersunk mounting screw

10 · confirmed · source

Datasheet explicitly lists 'M3-mounting Sensors' with accessory 'Bolt with hexagonal hole (M3×6)' and a second mounting bracket bolt 'M3×15'; tightening torque spec given as 'M3-mounting Sensors: 0.5 N·m max'

6-15mm · confirmed · source

'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws' — SynthRacks/GieTec rails tapped to M3

6-10mm · confirmed · source

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

7.5-10mm · confirmed · source

Official screw wiki documents M3x10 notation plus red/blue threadlocker coding; M screws must not be swapped with BT/ST self-tapping screws

10mm · confirmed · source

Kit contains M3x3 and M3x10 socket dome screws

3mm and 10mm · likely · source

Thumb screw is M3 thread with a 10mm shaft

10mm · likely · source

M3 is the Eurorack standard rail screw, commonly 6, 8 or 10mm

6-10mm · likely · source

M3 x 8mm through M3 x 30mm tapered and square thumbscrews

8-30mm · confirmed · source

Catalog lists hex standoffs with M3 thread, lengths 6.0-25.0mm

6-25mm · confirmed · source

Hexagonal nylon/brass PCB standoff, M3 thread, 10.0mm

10mm · confirmed · source

Mounting guidelines for TO-220/TO-220F/TO-247 packages specify the standard M3 mounting screw and torque

6-10mm typical · reported · source

Part WAT081265, Screw M3 x 10 sems

10mm · confirmed · source

hex barrel nut FA2016, 4.76 A/F, spaces loop card off backplane

10mm · confirmed · source

DIN 912 socket cap screws PN 5902010.001 / 5902007.001

10mm and 6mm · confirmed · source

Single Phillips stand screw; length reported as 8mm or 12mm depending on source

8-12mm · likely · source

Service parts list: M3 x 6, 8, 12 and 20mm black screws plus M3 x 6 countersunk

6-20mm · confirmed · source

Fixing screw M3 x 10 for connector inserts, article 09 16 000 9903

10mm · confirmed · source

M3 x 3mm and M3 x 10mm socket dome screws for heater block / nozzle assembly

3-10mm · confirmed · source

M3 x 8mm Phillips (x4) for V-Mount plate, M3 x 12mm (x4) for Gold Mount plate

8-12mm · confirmed · source

Silver M3 x 8 Cup S-tite and M3 x 10 Cup P-tite screws mounting the CIS module

8-10mm · confirmed · source

Four M3 x 10mm screws fix the internal shield, plus an M3 x 10mm fan assembly screw

10mm · confirmed · source

Washer-head Phillips M3 x 4, 6, 8 and 10mm chassis screws

4-10mm · confirmed · source

Star-washer Phillips M3 x 6, 8 and 10mm screws

6-10mm · confirmed · source

Trus-head Phillips M3 x 4, 8, 10 and 25mm screws, some with star washer

4-25mm · confirmed · source

M3 x 8mm and M3 x 12mm screws supplied with loose flat and lock washers

8-12mm · confirmed · source

Service manual specifies M3 fasteners in multiple lengths (M3x4, M3x5, M3x7.5, M3x10, M3x20, M3x25) for internal assembly, sensor brackets and covers

M3x4, M3x5, M3x7.5, M3x10, M3x20, M3x25 · confirmed · source

Parts code AWU 3X4SA = M3x4mm frame screw; AB3X10SA = M3x10mm; AHU3X8SA = M3x8mm

4mm, 8mm, 10mm · likely · source

gantry blocks, panel mounts, bed mounts, electronics bay

6, 8, 10, 12, 16, 20, 30mm · confirmed · Source: VoronDesign Voron-2 BOM (GitHub issue #256)

mainboard (SKR/Octopus) and PSU mounting to plate

6-10mm · confirmed · Source: VoronDesign Voron-2 official BOM

SMT PCB standoff for mounting boards to housings or other boards

0.5-16mm standoff height · confirmed · Source: we-online.com WA-SMSI product page

PCB-to-enclosure standoff stud

5-70mm · confirmed · Source: we-online.com spacer studs page

plastic PCB standoff stud

5-65mm · confirmed · Source: we-online.com spacer studs page

D-Sub connector panel jackscrew

10-18.2mm · confirmed · Source: we-online.com spacer studs page

PCB standoff

10mm · confirmed · Source: Keystone 24295 datasheet

AB drive motor mount, gantry and panel screws

8-25 mm · confirmed · source

Extruder motor mount screws

10-16 mm · confirmed · source

M3 module-mounting screws into sliding rail nuts (most common Eurorack size)

6, 8 or 10mm · reported · source

optic-to-mount screws (4x)

10mm · confirmed · source

frame arm, stack and camera screws per assembly manual

10, 16, 18, 28 and 35mm · confirmed · source

Cover-plate screws are M3-0.5 x 10 mm (black or plated).

10 mm · confirmed · source

Internal fastening, parts list "SCREW M3X10" x2

10 mm · confirmed · source

OEM screw pack: 4x M3x12 shoulder bolts (arms), 16x M3x10 button head, 4x M3x8 cap, 1x M3x6 cap

6-12 mm · confirmed · source

TBS screw set: M3x8 x16 (top/bottom plates), M3x14 x4 and M3x16 x4 (arms to centre plates), M3x6 x16 (motors), M3x30 standoffs x8

6-30 mm · confirmed · source

Saddle height adjustment screws, M3 hex head, 1.5 mm key

5-10 mm · confirmed · source

Saddle height screws listed as M3 x 10 mm

10 mm · confirmed · source

socket cap screws for cage top plate

10mm · confirmed · source

Celestron's official knowledge base lists collimation screw thread as M3 x 0.5, 10mm, for the C5 optical tube.

M3x10 mm · confirmed — Celestron Knowledge Base · source

Official Celestron reference lists M3 x 0.5, 10mm collimation screws for the C6 tube.

M3x10 mm · confirmed — Celestron Knowledge Base · source

Official Celestron reference lists M3 x 0.5, 10mm collimation screws for the C9.25 tube.

M3x10 mm · confirmed — Celestron Knowledge Base · source

Official Celestron reference lists M3 x 0.5, 10mm collimation screws for the 9.25" EdgeHD tube.

M3x10 mm · confirmed — Celestron Knowledge Base · source