M3 x 8mm screws — what they fit & where to buy

internal PSU assembly (PSU-to-case screws are larger)

5-8mm · reported · source

board mounting holes are ~3.2mm, sized for M3 (unlike the Pi's M2.5)

5-8mm · reported · 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

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

standard motor mounting bolt pattern for 5in-class quads

5-8mm by arm thickness · 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

internal cage assembly screws — the tripod-facing ports are 1/4-20, not M3

4-8mm · confirmed · 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

outer panel screws on the mini-PC

~6-8mm · 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

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

board mounting into enclosures (one hole near USB is oversized)

6-8mm · reported · source

adds rigidity when stacking shields

8-11mm · reported · source

corner mounting holes on common dev boards

6-8mm · 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

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 small rail to the frame

6-8mm countersunk · reported · source

countersunk bolts fixing the rail to a gantry plate

8-10mm countersunk · reported · source

attaches a toolhead plate to the sliding block

6-8mm · 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

attaches add-on ears to a desktop switch

6-8mm · reported · source

holds the PCB onto brass or plastic standoffs

6-10mm · reported · source

stompbox lids, jack plates and internal PCB mounting

6-10mm · reported · 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

Small reel handle and drag knob screws

4-8mm · 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

Faceplate and knob screws in restoration

4-8mm · 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

Driver mount screws in the woofer replacement guide

6-8mm · confirmed · source

Protective cover / housing screws

6-8mm · confirmed · 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

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

Motor base screws for 16x16mm or 19x19mm patterns, socket head

6-8mm · reported · source

16x16mm mount hole pattern using M3 bolts

6-8mm · reported · source

Servo horn (arm) screw 3x8mm, common across hobby servos

8mm · confirmed · 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

M3 x 0.5 retaining screw reported for Meade 1.25in 2x Ultima Barlow

4-8mm · 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

mounting screws attaching red dot sight to adapter plate, torqued to 12 in-lbs

8mm · confirmed · source

mounting screws attaching red dot sight to adapter, torqued to 12 in-lbs

8mm · confirmed · source

Pan-head screws (M3x8) securing base plate/EMV bracket to POS stand for terminal integration

8mm · confirmed · source

Installation guide bill of materials lists "2 M3 x 6 PHMS" and "4 M3 x 8 PHMS" as included mounting screws for the barcode scanner adapter bracket

6-8mm · 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

Replacement hardware kit description lists '6 x M3 8mm Philips head screws (black) – Rear case (can also be used at front)' as part of a full Amiga 500 case screw set.

8mm · confirmed · source

Vendor kit for attaching a Sanwa JLF mounting plate to a TP-8Y joystick body states 'Size: M3*8mm. Contenuto: 4 viti + 4 dadi' (4 screws + 4 nuts).

8mm · confirmed · source

OEM Samsung small-appliance tap screws explicitly specified as M3, e.g. 'Screw-Taptype;Bh,+,B,M3' (6003-000115) and 'Self-Tapping Screw, M3, Phillips Pan Head, M3 x 8, SWRCH18A Steel' (6002-000630)

L8mm typical · confirmed · source

Official Milwaukee Service Parts List for M18/M12 Gangbox Rapid Charger specifies 'M3 x 8mm Pan Hd. T-10 Screw' (part 05-81-1195, qty 33) for top housing assembly; M18 Fuel Impact Drill service parts list specifies 'M3 x 16mm Pan...' screw (part 06-82-6351)

8mm and 16mm · confirmed · source

Threaded rod / hex standoff stack rails and rail-end screws, Screw M3x8mm Flat Socket Head

8mm · confirmed · source

Security screw connecting Intuvia or Nyon 1 display to handlebar mount

8mm · 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

'TS Optics M3 thumb screw 7mm ... Suitable for many diagonal mirrors, adaptors and focusers'

7-8mm · confirmed · source

Listing: 'Metric Thumb Screws M3 M4 Telescope Parts... Size: M3 x 8mm'

8mm · confirmed · source

Mounting instruction sheet: 'Sight Manufacturer: Swampfox / Vortex Viper... Screws Used: M3 x 8', torque to 12 in/lb

8mm · 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

Parts list: 'ITEM 5, QTY 6, M3 x 6 mm CSK Screw Base Panel Screws' and 'ITEM 9, QTY 8, M3x8 Pan Screw Rear Panel Screws'

6-8mm · confirmed · source

Internal full rewinder module and lower front panel fastened with screws called out as M3*8L (torque 10.5/7.5 kgf.cm) and separate M4*8L screw for rewinder media guard limiter

4 mm, 6 mm, 8 mm · confirmed · source

Datasheet: M3-0.5 x 8mm plated, sold in packs of 100

8mm · confirmed · source

Genuine spare part YC.WJ.LL000215, black screw with washer

8mm · confirmed · source

Screw kit listing: two M3 x 8mm filter screws

8mm · confirmed · source

Cover, frame and mechanism screws listed as M3x4, M3x6, M3x8

4-8mm · confirmed · source

Parts list machine screws M3*5, M3*6, M3*8

5-8mm · confirmed · source

Scanner-to-bracket attachment screws called out as M3

6-8mm · confirmed · source

Four front mounting holes, M3 x 0.5 tapped 4.5mm deep minimum

4-8mm · confirmed · source

Camera-to-bracket screws on the AM-21M mount, M3x8

8mm · confirmed · source

Base panel M3x6 countersunk and rear panel M3x8 pan screws

6-8mm · confirmed · 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

Same kit lists M3 x 8 pan head machine screws (qty 4) for scanner-to-bracket fixing

8mm · confirmed · source

Official manual calls for M3 x 8 bolts to hold the hotend in place

8mm · reported · source

Build notes: 2x M3 x 8 socket head screws to mount the heat block cooling part

8mm · reported · source

Replacement bracket hardware specified as M3 x 8 (with M2 x 8 secondary)

8mm · reported · source

Replacement part listed as M3 x 8 countersunk dashboard cover screws

8mm · reported · source

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

6-25mm · 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

FPV motor mounting on 5-inch freestyle/racing quads is predominantly M3 socket-head; length must match arm thickness plus motor base depth so the screw never touches the windings (typically 6-8mm on 4mm arms).

6-8 · likely · source

Two M3 screws detach the PIN pad

8.0mm · confirmed · source

BOM: SCREW, M3X8, PAN-HEAD, CROSS-RECESS

8.0mm · confirmed · source

Same M3x8 pan-head across Elo kits

8.0mm · confirmed · source

BOM lists M3X8 pan-head cross-recess

8.0mm · confirmed · source

Verifone/Ingenico kits; SCREW_M3X8_SPECIAL

8.0mm · confirmed · source

M3 x 0.5 x 8mm

8mm · confirmed · source

cross-head chassis spare screw

8mm · confirmed · source

T-slot screw for robotics and drone frames

8mm · confirmed · source

gear casing screw PN 032T.0019XA (x2)

8mm · confirmed · source

flat machine screw SM-6030800-SP, pitch 0.5

8mm · confirmed · source

Pozi head screw PN 391087 (x2)

8mm · confirmed · source

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

8-12mm · likely · source

Six socket-cap saddle locking / intonation screws, M3-0.5 pitch

8mm · confirmed · source

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

6-20mm · confirmed · source

Three new M3 x 4mm countersunk screws fix the silicone gobo rotation gear; M3 x 8 Torx pan head elsewhere

4mm / 8mm · 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

M3 x 8mm and M3 x 6mm ISO 10642 countersunk screws joining X/Y/Z frames into M3x3 Helicoil inserts; four M3 PC/104 stacking rods

5-8mm · confirmed · source

M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag

4-8mm · confirmed · source

M3 x 6mm Taptite outer shield screws (x6) and M3 x 8mm Taptite interconnect board screws (x2)

6-8mm · confirmed · source

Taptite cup B M3 x 8 screws (x2) fastening the key stopper, torque 0.4 Nm

8mm · confirmed · source

Cup S M3 x 6 Taptite for scanner motor ground and four pan B M3 x 8 Taptite for the scanner motor bracket

6-8mm · 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

M3 x 8mm screw in the exploded-view parts list

8mm · confirmed · source

Pan-head Phillips M3 x 5mm and M3 x 8mm chassis screws listed as cross-model stock hardware

5-8mm · 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

Self-tapping Phillips M3 x 4, 6 and 8mm screws

4-8mm · 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

M3 x 6mm tapping screw, M3 x 8mm screw with washer and M3 x 6mm RS-type chassis screw

6-8mm · confirmed · source

Universal projector plate hardware kit explicitly specifies M3 x 8mm screws

M3x8 · confirmed · source

COSEL's official terminal block torque FAQ explicitly lists M3 screw diameter with recommended torque 0.36-0.6 N·m for terminal block connections used across their industrial power supplies

M3x6-M3x8 · confirmed · source

Samsung washer service manual explicitly lists M3 screws for control board and sensor bracket fasteners in its exploded parts diagram torque table

M3x8 · likely · source

3x M3x8mm screws in the official bill of materials

8mm · confirmed · source

M3x8mm socket head cap screw, ISO 4762 / DIN 912, A2 stainless

8mm · confirmed · source

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

4mm, 8mm, 10mm · likely · source

Lens supporter fixed with M3 L8 hex screw and washer

8mm · confirmed · source

chassis / panel screws 1-6

8mm · confirmed · Source: Dell S2425H Simplified Service Manual

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

PCB standoff spacer

8mm body · confirmed · Source: Keystone Catalog M60.2 p.72

2020 extrusion to X-carriage fasteners

8 mm · confirmed · source

AB drive motor mount, gantry and panel screws

8-25 mm · confirmed · source

Torx EJOT screws for rear enclosure and case assembly

8 mm · confirmed · source

Enclosure screws for rear panel and internal board mounts

8 mm · confirmed · source

Case screws for rear enclosure assembly

8 mm · confirmed · source

4x M3 mounting screws plus 2x M3 safety-stop screws

6-8mm · confirmed · source

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

6, 8 or 10mm · reported · source

Parts list item 4: Screw, M3 by 8, part XA9-1200-000CN

8mm · confirmed · source

Parts list item 6: Screw, M3 by 8, RS, part XA9-1276-000CN

8mm · confirmed · source

Manufacturer mounting instructions explicitly specify M3 x 8mm screws (torque 12 in-lb) for these optic footprints, which are also used on some archery bow-sight red-dot mounts sharing the same footprint

8mm · confirmed · source

Standard Eurorack module mounting screws into the rails, M3 x 6 mm or 8 mm with a washer

6-8 mm · confirmed · source

Official manual: M3x8 SHCS hold each of the four Z-drive stepper motor mounts; M3x40 SHCS on the Z-drive top plate; M3x16 SHCS at the 3-point bed mounts

8 mm, 16 mm, 40 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

Speed and imbalance recognition assembly, parts list "Z-SCREW M3 X 8"

8 mm · confirmed · source

Chassis / GPIB area screws listed as "Screw M3 x 8 mm 0515-1105"

8 mm · confirmed · source

Electrospray nebulizer and spacer: "Screw, M3 x 0.5 x 8 T10"; fragmentor contact holder: "Screw, M3 x 12 mm Pan torx T10"

8 mm and 12 mm · confirmed · source

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

5-10 mm · confirmed · source

Kit contents: 4x M3x8 pan Torx screws and M3 Nyloc nuts

8 mm · confirmed · source

socket caps securing SSD guard to camera body

8mm · confirmed · source

bracket mounting to self-service stand

8mm · confirmed · source

display bracket strap screws

8mm · confirmed · source

small screws attaching mount frame to mPOP unit

8mm · confirmed · source

Official Celestron reference lists M3 x 0.5, 8mm collimation screws for the C8 tube.

M3x8 mm · confirmed — Celestron Knowledge Base · source

Same manual, Bag C: 'SCREW, M3X8, PAN-HEAD, CROSS-RECESS' Qty.3

M3x8 mm · confirmed — Elo Touch Solutions QIG600074 · source

Assembly instructions Bag C: 'SCREW, M3X8, PAN-HEAD' Qty.2

M3x8 mm · confirmed — Elo Touch Solutions QIG600186 · source

OEM engineering drawing callout: 'M3 X 8MM BUTTON HEAD SCREW SECURES ACCESS COVER TO VERIFONE M400 REAR LOCKING BRACKET'

M3x8 mm · confirmed — Verifone-compatible mounting bracket engineering drawing (Collage/CDN hosted OEM spec) · source