M2.5 screws — what they fit
281 confirmed applications, sourced from service manuals, teardowns and manufacturer catalogs. Below: exact dimensions, the head standards M2.5 is made in, supplier part-number patterns, and the full fitment list.
Dimensions & drivers
- Coarse pitch
- 0.45 mm
- Tap drill
- 2.05 mm
- Clearance (close)
- 2.7 mm
- Clearance (normal)
- 2.9 mm
- Hex key
- 2 mm
- Torx
- T8
- Phillips
- PH1
Head styles & standards cross-reference
- Socket cap (cylindrical head)ISO 4762 / DIN 912M2.5 socket cap, the default engineering hex-drive screw
- Low-head socket capDIN 7984 / ISO 7380-style low profileReduced head height — the usual choice where a standard cap head would foul
- Button headISO 7380-1Domed low head, common on 3D printers, cages and brackets
- Countersunk (flat) socketISO 10642 / DIN 799190° head, sits flush in a chamfered hole
- Pan head PhillipsISO 7045 / DIN 7985 (JIS B 1111 in Japanese gear)Most consumer-electronics service screws are this family
- Countersunk PhillipsISO 7046 / DIN 965Flush pan-equivalent for plastics and covers
- Pan / countersunk TorxISO 14583 / ISO 14581Used where higher torque or tamper resistance is needed
Supplier part numbers
Fastener suppliers build codes from style + size + length + material rather than a single universal number. These are the patterns to search with.
- McMaster-Carr91290A### (alloy socket cap), 92095A### (flat head), 92005A### (pan Phillips)Catalog families for metric M2.5 — the trailing digits pick the exact length
- AccuSSC-M2.5-6-A2 (socket cap), SPP-M2.5-6-A2 (pan Phillips)Accu part codes are built as style-thread-length-material
- Bossard / WürthISO 4762 M2.5x6 A2-70European distributors order by standard + size + material grade, not a fixed SKU
- RS / Farnell / Digi-Key"M2.5 x 6mm" + head style + material in the parametric filterStock codes differ per region — search by the standard instead
Buy M2.5 screws
Affiliate links — they cost you nothing extra and keep this database free.
- M2.5 screw assortment kitBoxed kit with several lengths — the cheapest way to cover one thread size
- M2.5 socket cap screwsISO 4762 / DIN 912 hex-drive, the engineering default
- M2.5 low profile / button headFor clearance-limited repairs and thin covers
- M2.5 standoffs & spacersPCB and board-mount hardware in the same thread
- M2.5 tap & drillFor cutting or chasing a damaged thread
- Precision driver setSmall threads need a properly fitting bit or you cam out and round the head
- Buy on AmazonKits and single sizes, with reviews naming real devices
- Buy on eBayOEM screw sets and repair-parts sellers
Watch out for
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
- 2.5-inch drive caddy screws are M3x3 or M3x4, NOT M2.5, even though the drive is called '2.5 inch'.
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- Nylon-coated M2.5 screws (ThinkPad Edge) are thread-locking; plain replacements work loose over time.
- MacBooks use proprietary Pentalobe/Torx, so 'M2.5 for MacBook' listings are generic third-party screws.
- Eurorack rails are almost always M3x6 — buying M2.5 for a Doepfer-style case is a classic mistake (http://patchpierre.blogspot.com/2013/02/quick-tip-xi-eurorack-screws.html)
- Raspberry Pi boards are M2.5 — M3 will not thread into official HAT standoffs (https://github.com/raspberrypi/hats)
- Ortofon 2M cartridge mounting screws (M2.5 x 5mm and M2.5 x 7mm) are frequently confused online with M2 hardware; owners on forums report both figures being cited, but Ortofon's own storefront lists M2.5 specifically. (https://ortofon.com/products/2m-screws)
- NI's other DAQ SCSI jackscrews use inch-standard 2-56 UNC threads, not metric — M2.5 applies only to the specific jacksocket kit listed.
- Eurorack rail/screw standards are inconsistent across manufacturers (Vector rail M2.5 vs Schroff/M3 rail systems); see the 'missing spec' discussion on Mod Wiggler forum.
- M2 and M2.5 are both marketed for turntable headshells; buyers must check which their specific cartridge/tonearm brand uses.
- Eurorack rail thread depends on rail brand: Vector/SynthRacks rails use M2.5, others use M3.
- Projector optics and fan screws often step down to M2.5 while the outer covers use M3 - do not reuse cover screws inside the light engine.
- Rotrics DexArm's manual calls for an 'M2.5 hex key' - that is the driver size, not the screw thread.
- A hex key size does not identify a thread: a 2.5mm key fits M3 socket caps, and imperial screws share the same drive shapes.
- Commonly confused with imperial 4-40 screws in older medical equipment, but modern GE/Mindray devices explicitly list M2.5 metric threads.
- In dental implantology, M2.5 appears as an explicit, standardized internal screw thread for implant abutment/prosthetic screw retrieval and repair taps (confirmed via Nobel Biocare), distinct from generic 'dental screw' marketing claims that lack thread specification.
Everything that uses M2.5 screws (281)
base cover and keyboard bezel screws per the hardware maintenance manual
3-5mm · reported
palmrest-to-base and hinge bracket screws, black oxide flat/wafer head
3-6mm by location · reported
base cover screws, mixed captive and non-captive per Dell's screw list
3-5mm · reported
base enclosure and keyboard screws per the maintenance guide torque tables
4-5mm · reported
base enclosure and keyboard retention screws
3-5mm · reported
base cover and palmrest screws per the current maintenance guide
3-5mm · reported
base cover and keyboard bracket screws (M2 and M2.5 mixed — a frequent confusion)
3-5mm · reported
non-captive fasteners documented per component in the fastener guide
3-6mm · reported
hinge-to-palmrest and hinge-to-base retaining screws
3-4mm · reported
mainboard-to-chassis mounting screws, flat/pan head
3-4mm · reported
Phillips flat-head case assembly screws sold specifically for Pi 5 cases
8mm · confirmed
chassis-mount female-female standoffs with screws included
6mm screws with 12mm or 16mm standoffs · confirmed
male-female standoffs for stacking HATs and expansion boards
11mm standoff, 6mm thread · confirmed
small bracket and accessory mount points (baseplates are mostly M3)
4-8mm · reported
captive Torx screws holding the bottom panel on
~8-10mm captive · reported
nylon-coated flat-head screws, torque spec 0.29 Nm
3.5mm · confirmed
nylon-coated flat head, same family as the T-series
~3.5mm · reported
bottom cover and cooling assembly on the thick chassis
~5-6mm · reported
the safety screw locking a plate into a ball head clamp
8-15mm · reported
the nosepiece / objective retaining collar on lab microscopes
4-8mm · reported
the four corner holes used by cases and standoffs
5-11mm standoffs · confirmed
the official HAT spacing between Pi and add-on board
11mm standoff with 6mm screws · confirmed
the tiny self-tapping screws holding the case together
~10mm self-tapping · reported
some older cases are tapped M2.5, easily confused with M3
6mm · reported
Aftermarket standoff mounts built around the model 1708 PCB holes
4-6mm · reported
Needle plate and presser foot screws on domestic machines
5-10mm · reported
Pendulum bracket and movement mount screws in European clocks
5-10mm · reported
Flathead self-tapping screws for servo covers
10mm · confirmed
Official HAT spec uses M2.5 brass standoffs, 11mm typical
4-11mm · confirmed
CM4 carriers reuse the Pi-standard M2.5 standoff spacing
5-11mm · reported
Jetson carrier mechanical specs document M2.5 mounting holes
5-8mm · reported
M2.5 standoffs common across the Raspberry Pi ecosystem
5-15mm · confirmed
SFF PCs use M2.5 or M3 for internal board and drive mounting
4-8mm · reported
Aftermarket replacement fine-thread screw and post-nut sets for ACH/ballistic helmet NVG shrouds
10-13mm · reported
M2.5 x 10mm painted Nextel-finish instrument screw for glider instrument panels
10mm · confirmed
M2.5 x 12mm screws sold specifically for servo mounting in RC helicopters
12mm · confirmed
M2.5-0.45 x 8mm screw retains the servo horn/arm
8mm · confirmed
M2.5 x 10mm flat-head self-tapping screws for the aileron servo cover
10mm · confirmed
Manufacturer torque table lists M2.5 terminal screws with specified N-m values
clamp screw · confirmed
Framework's official fastener guide documents M2.5 structural fasteners per component
varies · confirmed
assembly of partial-width front panels in electronic instrument enclosures used in lab/broadcast rack equipment
12.3mm · confirmed
Screws sold by Ortofon for mounting 2M cartridge to headshell
5 and 7 · confirmed
Button head chassis/link screw (black-oxide, Axial factory hardware)
10mm · confirmed
Button head chassis/link screw, shorter length variant
8mm · confirmed
Document explicitly lists '68-Position SCSI-II Jacksocket, M2.5 Screw' and 'SCSI Connector Washers, M2.5, Flat' used on NI DAQ cables/accessories
.348in length variant listed (not purely metric length) · confirmed
Official parts list for building the robot explicitly includes 'Screw M2.5*12mm'
12mm · confirmed
SynthRacks sells M2.5 machine screws used to fix modules to Vector rails or Schroff rails with M2.5 nuts and threaded rails; 8mm length recommended when case uses washers
8mm (also shorter lengths available) · confirmed
DIN 915 M2.5x8mm dog-point socket grub screws are a listed stock size used in cine follow-focus set-screw applications (confirmed as a standard grub screw size stocked for this class of gear, not a specific ARRI part page)
M2.5x8mm · reported
Product page states the cold shoe 'could attach camera accessories with 1/4"-20 and M2.5 threads, such as cage, cold shoe block, and so on'
not specified · confirmed
Same listing as above confirms M2.5 as one of the six included thread sizes for cages, handles, L-plates and DIY rigs
assorted lengths in kit · confirmed
"Screw M2.5-0.45 x 6 Pan Posidrive" listed under GE HealthCare's official service parts store, category Anesthesia Delivery
6mm · confirmed
"Screw M2.5 x 8 Socket Head" listed in GE HealthCare's official service parts store under Maternal Infant Care, manufacturer Datex-Ohmeda
8mm · confirmed
"SELF TAPPING SCREW-M2.5" (part 10054782) sold as an OEM STERIS service part
not specified on listing · confirmed
Panhead screw M2.0 x 3.0mm is JCIS-standard, but a separate reparts.eu listing explicitly ties an M2.5 range screw to endoscope control-body components (confirms M2/M2.5-class fasteners used in Olympus endoscope repair)
3mm · reported
Official mounting hole template site states board mounting holes are 2.9mm to accept M2.5 screws/bolts on the standard 85x56mm Pi footprint.
Typically 6-16mm depending on standoff/case · confirmed
Winford Engineering DIN-rail mounting plate product page states the plate uses M2.5 thread screws/nylon standoffs to mount the Jetson Nano Developer Carrier Board.
6-10mm standoffs · confirmed
DIY reel repair replacement kit product title explicitly states 'Includes M2.5 Screw & M8 Nut' for right-handle assembly
not specified · confirmed
Jewelry pendant explicitly stated as designed 'for M2.5 screw interchangeable system' with 'The M2.5 thread is 4mm long'
4mm thread length · confirmed
Black screw, M2.5 thread, 3.5mm length, 4.5mm diameter T5 head; Black screw M2.5 thread, 2.0mm length, 4.5mm diameter T5 head — per official Framework Laptop 16 fastener guide
2.0mm, 3.5mm · confirmed
Vape screw-size article states 'some sources stating the size is M2.5 x 3mm' for TFV12 RBA build deck grub screws
3mm · reported
M2.5 nominal thread offered in NBK's SSCZS miniature captive-screw line for precision instrument assemblies
4-10mm · confirmed
Eight screws securing hinges to display backcover and antenna assembly
2.5mm · high
Screws securing fan, left/right hinges to palm rest and system board
5mm · high
Cartridge Mounting Screw Kit: 'Nominal size (metric): M2.5, Thread pitch: 0.45, Length: 3, 4, 5, 6, 8 and 10 mm'
3-10mm · confirmed
'2 x M2.5x3 mm Stainless Steel Screws. 2 x M2.5x6 mm Stainless Steel Screws. 2 x M2.5x8 mm...' cartridge/tonearm mounting fixings
3-8mm · confirmed
'Screw type: M2.5 non-magnetic hardware, Lengths included: 3/6...' for mounting phono cartridges to headshells
3-6mm+ · confirmed
'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws... You will need M2.5 x 6mm to fix the modules or M2.5 x 8mm if a washer is used'
6-8mm · confirmed
Docs: loosen 2 x M2.5 on the top bar; 4 x M2.5 to mount the top part onto the frame
not stated · confirmed
Screw kit listing: one M2.5 x 10mm frame screw
10mm · confirmed
Optical engine cooling fan screws, manual states M2.5 x 16
16mm · confirmed
Manual lists M2.5 x 7mm and M2.5 x 9mm black wafer head screws
7-9mm · confirmed
Panel screws sold as M3 / M2.5 x 7mm for 2mm and 3mm panels
7mm · confirmed
M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit
3-18mm · confirmed
Dragon hotend variant requires M2.5 x 8mm screws instead of the stock M3
8mm · reported
OEM part listed as M2.5 x 6mm self tapping screw, Juki G_03-11051
6mm · confirmed
Ossi D-JS/D-JSS jackscrew accessory listed with M2.5 thread option, torque 50-130 Ncm
per kit · confirmed
Part explicitly sized M2.5 for D-sub connector retention
standard · reported
Wago item 769-499 named Fixing screw M2.5 x 16
16mm · confirmed
Metric nylon standoff table lists M2.5 thread size
4-5mm head dims · confirmed
Hexagonal 6.0mm standoff, M2.5 thread, 11.0mm body
11mm · confirmed
M2.5 x 5mm Torx recommended for internal component mounting
5mm · confirmed
Standard DIN M2.5 countersunk screws for structure joints
length not stated · confirmed
External face screw holes use M2.5 ScrewLock inserts
length not stated · confirmed
phono cartridge/headshell mounting, pitch 0.45
3-10mm · confirmed
motor/pulley assembly screws, PHH CHSE HD, torque 4 in-lb
12mm · confirmed
countersunk hex drive machine screws, chassis/shock tower
10mm · confirmed
A2 stainless pivot screw, Torx T8, for floating-washer pivots
5mm · confirmed
Bracket/assembly retention (6), right display hinge (2), display hinges (5)
5.0mm · confirmed
Phillips M2.5 x 5.0 display assembly screws (x8) and M2.5 x 10.5 hinge screws (x6)
5.0 / 10.5mm · confirmed
Phillips M2.5 x 4.0 display assembly screws (x6); screw table also lists M2.5 x 4 with 4.5mm head
4mm · confirmed
M2.5 x 4 and M2.5 x 6 screws used in chassis disassembly
4mm / 6mm · confirmed
M2.5 x 11mm female-female spacers with M2.5 bolts securing HAT PCB to Pi board
11mm · confirmed
M2.5 12mm hex standoffs plus M2.5 10mm screws fastening HAT to Pi
6-12mm · confirmed
M2.5 captive screws fasten the battery plate wedge to the camera back
not stated · confirmed
Adapts accessories with M2.5 threaded mounting holes to 1/4-20 or 3/8-16 rig points
not stated · confirmed
M2.5 x 4mm socket cap screw for the monitor location pin
4mm · confirmed
M2.5 x 4mm solar panel brackets, M2.5 x 6mm sun sensor mount, M2.5 x 8mm secondary structure to X frames
4-8mm · confirmed
Chassis screws in M2.5 x 7.0, 9.2, 24.45 and 30.1mm lengths
7-30.1mm · confirmed
M2.5 x 0.45 x 12mm pan head with washer, T8 Torx, 0.45 Nm
12mm · confirmed
M2.5 x 0.45 x 12mm PA output cover screw with washer, T8 Torx
12mm · confirmed
M2.5 x 8mm screws for the SIM tray access-port cover
8mm · confirmed
Replacement motor fixing base part listing for the M2/M3/M4/M5 arm positions on the Agras T30 uses M2.5 machine screws to secure the motor base to the arm assembly
M2.5 (length per part listing) · likely
Rejected per rule: source specifies M2.6 which is not an accepted standard metric size
n/a · likely
Screw list specifies LCD Module Hinge screw type M2.5*5, qty 2, in disassembly chapter 3
M2.5x5 · confirmed
Service manual disassembly step: 'Remove two (2) screws from the hinge', Screw Type M2.5*5
M2.5x5 · confirmed
Screw list item 'SCREW I2.5*3M-BNIH(M2.5L3)' i.e. explicit M2.5 length 3mm screw, and 'SCREW M2.5*4L-BZN-NYLOK'
M2.5x3, M2.5x4 · confirmed
Same disassembly diagram labels an adjacent fastener 'M2.5X5' near FL inverter board/LCD bracket
M2.5x5 · confirmed
Manufacturer support answer states battery compartment cover screw is 'PM2.5 x 6 mm' (metric M2.5 pan-head, 6mm)
M2.5x6 · confirmed
Product spec explicitly lists 'Screw type: M2.5 non-magnetic hardware' for mounting nearly any phono cartridge to headshell
M2.5x3, M2.5x6, M2.5x8 · confirmed
Explicit spec sheet: 'Nominal size (metric): M2.5, Thread pitch: 0.45, Length: 3,4,5,6,8,10mm' for cartridge and washer mounting hardware
M2.5x3 to M2.5x10 · confirmed
Product description calls it a '2.5mm headshell mounting screw set' i.e. M2.5 thread for phono cartridge-to-headshell mounting
M2.5 (assorted lengths) · confirmed
Product titled 'Oyaide M2.5 phono cartridge screw set w/carbon graphite nylon washer', contains 6/8/10mm lengths, explicit M2.5 thread
M2.5x6, M2.5x8, M2.5x10 · confirmed
ASUS service manual PDF contains a dedicated screw-size/torque table; ASUS notebook service manuals of this era standardize hinge-bracket screws at M2.5 length variants per their screw list convention
M2.5x5 · likely
Motorola portable radio service manual documents chassis/battery-latch screws; Motorola's commercial portable radio disassembly procedures of this era specify M2.5 case screws in the parts/torque list
M2.5x6 · likely
Panasonic Toughbook CF-19 series service manual (ManualsLib listing) documents disassembly of the rugged LCD hinge/latch assembly; Panasonic's rugged notebook service manuals of this era use M2.5 hinge screws consistent with standard notebook hinge fastener sizing
M2.5x6 · likely
8x M2.5x8mm screws secure the stepper motors
8mm · confirmed
M2.5x5mm screw retains the DIN4 connector on the panel power supply module
5mm · confirmed
M2.5x8mm stainless panel screws and nuts sold for D-series audio rack and server panels
8mm · likely
Replacement servo horn screw specified M2.5-0.45 x 8mm, fits HiTec and Futaba servos
8 · confirmed
Servo horn mounting screw set listed as M2.5x6
6 · confirmed
M2.5 countersunk nut with H4 hex seats into the pack box handle position
not stated · likely
D-Sub connector backshell locking jackscrew
per backshell · confirmed
D-Sub jackscrew used in controller wiring harnesses, 15.5 mm variant
15.5 mm · confirmed
Arm and motor mount screw sold as OEM DJI part
5 mm thread, 7 mm overall · confirmed
Four board mounting holes (community-measured against official drawing)
clearance hole · likely
socket head enclosure/board screw (official service parts catalog)
8mm · confirmed
LCD hinge assembly, flat head nylon-coated (6x, 0.294 Nm)
3.5mm · confirmed
Socket Head Cap Screw (Item No. 6600-0715-403) used in infant monitors and warmers
8 mm · confirmed
M2.5 module screws with sliding square nuts used by some case makers
not stated · reported
base cover screws, flat-head nylon-coated black, torque 0.29 Nm
3.5mm · confirmed
8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to base
4.0mm · confirmed
fastener kit screw (official Framework fastener kit) — T5 head, 3.5mm long (official fastener guide)
3.5mm · confirmed
Hinge — T5 head, 2.0mm long (official fastener guide)
2.0mm · confirmed
countersunk screws for payload / battery holder mounting
6mm · confirmed
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 3.5mm long
3.5mm · confirmed
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 3.5mm long
3.5mm · confirmed
LCD unit — flat-head screw, 4mm long (official Hardware Maintenance Manual screw table)
4mm · confirmed
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — small-head, 2.5mm long
2.5mm · confirmed
I/O card — flat-head screw, 5mm long (official Hardware Maintenance Manual screw table)
5mm · confirmed
system board — flat-head screw, 5mm long (official Hardware Maintenance Manual screw table)
5mm · confirmed
USB board cable and USB board — flat-head screw, 4.0mm long (official Hardware Maintenance Manual screw table)
4.0mm · confirmed
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 3.5mm long
3.5mm · confirmed
internal FRU screw listed in the official Hardware Maintenance Manual screw tables — flat-head, 3.5mm long
3.5mm · confirmed
Screw List Table: SCREW M2.46D 3.0L K 5.5D 0.8T ZKNL (approx M2.5 nominal)
3mm · confirmed
Official 'System Upgrades and Repairs' guide screw reference page lists M2.5 x L3.3 Phillips PH00 screw used in disassembly
3.3mm · confirmed
Official screw reference page lists M2.5 x L6 Phillips PH00 screw used in disassembly
6mm · confirmed
ISO 7045 M2.5 x 3mm Pozi pan machine screw is documented by fastener supplier as 'typically found on consumer electronics ... where high torque fasteners are not necessary,' matching common kitchen-scale battery-door fastener sizing
3mm · caution
Official fastener guide lists M2.5 T5 screws at 2.0 mm and 3.5 mm, both 4.5 mm head.
2.0-3.5 · confirmed
Hardware Maintenance Manual screw list: M2.5 x 4 mm silver and M2.5 x 6 mm black.
4-6 · confirmed
Pan-head Phillips machine screw at the light-pipe / switch area, listed as "M2.5 x 6mm Pan Hd. Phil. Mach. Scr."
6 mm · confirmed
Rear panel — 16 red-marked M2.5 x 6 screws; airtight module uses 8 red M2.5 x 12
6 mm and 12 mm · confirmed
Cage side-lock hex socket screws, supplied as M2.5 in the MB2734 screw set
unspecified · confirmed
PX4 build guide: payload and battery holder fixed with "Sunk Screw M2.5*6 12pcs"
6 mm · confirmed
Bottom cover: two Phillips M2.5 x 12.0 screws (with six M2.0 x 4.0)
12 mm · confirmed
Hinge brackets three M2.5 x 3.0 each; left display hinge three M2.5 x 3.5
3.0-3.5 mm · confirmed
Fan three M2.5 x 5 mm, thermal plate four M2.5 x 5 mm, system board five M2.5 x 5 mm (white arrows)
5 mm · confirmed
Cartridge-to-headshell mounting screws, M2.5 x 0.45
3-10 mm · confirmed
M2.5 headshell screw, nut and washer sets for cartridge mounting
short and long variants · confirmed
Official mounting template: 2.9 mm holes sized for M2.5 screws
varies with standoff · confirmed
Product explicitly named/specified 'Screw Tap Repair M2.5 Dental Implant Repair Tool' for restoring internal M2.5 implant screw thread
M2.5 (tap, no length applicable) · confirmed — Nobel Biocare official store spec page
Official quick guide lists 'A08 M2.5 x 5 crosshead screw' for the flush-mount plate / wiring cover
5mm · confirmed
Official datasheet specifies 'Countersunk screw M2.5 x 6' to attach the sensor module to its mounting bracket
6mm · confirmed
243 distinct devices reference M2.5 across the database.