M2.5 x 4mm screws — what they fit & where to buy
2,211 sourced applications in this database list a M2.5 screw at 4 mm (or a length range that includes it), most of them in laptops & pcs. A M2.5 x 4mm screw has a 0.45 mm coarse pitch, so a fully engaged 4 mm shank gives about 8.9 thread turns (1.6× the diameter).
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.
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M2.5 x 4mm Screws for Lenovo IdeaPad 5 Pro 14 Display Hinge 10-Pack Black
$4.99 -
M2.5 x 4mm Screws for Lenovo IdeaPad 5 Pro 14 System Board Hinge 10-Pack Black
$4.99
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M2.5 x 4mm Black Wafer Head Screws for Lenovo ThinkPad S440 Motherboard Replacement – 10-Pack Black
$4.99
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M2.5 x 4mm Screws for HP EliteBook 840 G8 Display Assembly 10-Pack Black
$4.99
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HP EliteBook 840 G8 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 4mm, M2.5 x 4mm Phillips Wafer Head, Black
$0.10Choose size -
M2 x 2.5mm, M2 x 5mm, M2.5 x 4mm Phillips Wafer Head Screws Sold Individually – Black
$0.10Choose size -
Dell Inspiron 15 3520 Replacement Screws Sold Individually – M2 x 3mm, M2 x 5mm, M2.5 x 5mm, M3 x 3mm Phillips Wafer Head, Black
$0.10Choose size -
Dell Latitude 5430 Replacement Screws Sold Individually – M2 x 2.5mm, M2 x 3mm, M2 x 5mm, M2.5 x 5mm Phillips Wafer Head, Black
$0.10Choose size
M2.5 x 4mm specs
- Thread
- M2.5 × 0.45
- Length
- 4 mm
- Thread turns
- ≈ 8.9
- Length ÷ diameter
- 1.6×
- Tap drill
- 2.05 mm
- Clearance (close)
- 2.7 mm
- Phillips
- PH1
- Torx / hex
- T8 / 2 mm
Length is measured from under the head for pan, wafer and button heads, and overall for flat (countersunk) heads. Neighbouring sizes we track: M2.5 x 5 mm (3259).Going 0.5 mm too long can bottom out in a blind boss or touch a board underneath.
Where M2.5 x 4mm screws are used
- Laptops & PCs2171
- Electronics, Racks & Enclosures8
- Other Equipment6
- Vehicles, Marine & Mobility6
- Cameras & Optics5
- Gaming & Peripherals4
- 3D Printing, CNC & Robotics2
- Drones, RC & Gimbals2
More M2.5 x 4mm listings named for specific devices
Devices that use M2.5 x 4mm screws (2,211)
base cover and keyboard bezel screws per the hardware maintenance manual
3-5mm · reported · source
base cover / keyboard screws in the HMM screw table
3-5mm · reported · source
palmrest-to-base and hinge bracket screws, black oxide flat/wafer head
3-6mm by location · reported · source
base cover screws, mixed captive and non-captive per Dell's screw list
3-5mm · reported · source
base enclosure and keyboard screws per the maintenance guide torque tables
4-5mm · reported · source
base enclosure and keyboard retention screws
3-5mm · reported · source
base cover and palmrest screws per the current maintenance guide
3-5mm · reported · source
base cover and keyboard bracket screws (M2 and M2.5 mixed — a frequent confusion)
3-5mm · reported · source
non-captive fasteners documented per component in the fastener guide
3-6mm · reported · source
hinge-to-palmrest and hinge-to-base retaining screws
3-4mm · reported · source
mainboard-to-chassis mounting screws, flat/pan head
3-4mm · reported · source
small bracket and accessory mount points (baseplates are mostly M3)
4-8mm · reported · source
bottom cover screws, usually hidden under the rubber feet
~4mm · reported · source
bottom panel screws on budget and consumer lines
~4-5mm · reported · source
secures the lens mount to a mirrorless or DSLR body
3-6mm · reported · source
secures the accessory shoe to the camera top plate
3-5mm · reported · source
the nosepiece / objective retaining collar on lab microscopes
4-8mm · reported · source
bezel ring and strap lugs on wrist dive computers
3-6mm · reported · source
Aftermarket standoff mounts built around the model 1708 PCB holes
4-6mm · reported · source
Smaller screws for the top control panel
4-6mm · confirmed · source
Official HAT spec uses M2.5 brass standoffs, 11mm typical
4-11mm · confirmed · source
Third-party camera mounts use M2.5/M2 board holes
4-8mm · reported · source
SFF PCs use M2.5 or M3 for internal board and drive mounting
4-8mm · reported · source
Head 4.7mm diameter, 1.5mm high
4-20mm · confirmed · source
Jewelry pendant explicitly stated as designed 'for M2.5 screw interchangeable system' with 'The M2.5 thread is 4mm long'
4mm thread length · confirmed · source
M2.5 nominal thread offered in NBK's SSCZS miniature captive-screw line for precision instrument assemblies
4-10mm · confirmed · source
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 · source
'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 · source
'Screw type: M2.5 non-magnetic hardware, Lengths included: 3/6...' for mounting phono cartridges to headshells
3-6mm+ · confirmed · source
M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit
3-18mm · confirmed · source
Metric nylon standoff table lists M2.5 thread size
4-5mm head dims · confirmed · source
phono cartridge/headshell mounting, pitch 0.45
3-10mm · confirmed · source
Phillips M2.5 x 4.0 display assembly screws (x6); screw table also lists M2.5 x 4 with 4.5mm head
4mm · confirmed · source
M2.5 x 4 and M2.5 x 6 screws used in chassis disassembly
4mm / 6mm · confirmed · source
M2.5 x 4mm socket cap screw for the monitor location pin
4mm · confirmed · source
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 · source
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 · source
top cover / bezel assembly retention (5)
4mm · confirmed · Source: HP EliteBook 830/836 G5 MSG
right display hinge retention (2)
4mm · confirmed · Source: HP EliteBook 830/836 G5 MSG
display hinge set retention (5)
4mm · confirmed · Source: HP EliteBook 830/836 G5 MSG
PCB standoff spacer
4-5mm thread length · confirmed · Source: Keystone Catalog K75 2025 p.87 / M60.2 p.72
8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to base
4.0mm · confirmed · source
LCD unit — flat-head screw, 4mm long (official Hardware Maintenance Manual screw table)
4mm · confirmed · source
USB board cable and USB board — flat-head screw, 4.0mm long (official Hardware Maintenance Manual screw table)
4.0mm · confirmed · source
Hardware Maintenance Manual screw list: M2.5 x 4 mm silver and M2.5 x 6 mm black.
4-6 · confirmed · source
Cartridge-to-headshell mounting screws, M2.5 x 0.45
3-10 mm · confirmed · source
Hard drive (qty 4, silver, Phillips)
4 mm · confirmed · source
Display (qty 6, Phillips)
4 mm · confirmed · source
Hard drive (qty 4, black, Phillips)
4 mm · confirmed · source
Hard drive (qty 4, black, Phillips)
4 mm · confirmed · source
Heat sink (qty 2, captive, silver, Phillips)
4 mm · confirmed · source
Hinge (qty 4, Phillips)
4.2 mm · confirmed · source
Hinge (qty 3, Phillips)
4 mm · confirmed · source
Hinge (qty 3, Phillips)
4 mm · confirmed · source
Hard drive (qty 4, silver, Phillips)
4 mm · confirmed · source
Hard drive (qty 4, silver, Phillips)
4 mm · confirmed · source
Display (qty 6, Phillips)
4 mm · confirmed · source
I/O board (qty 3, flat, black)
4 mm · confirmed · source
Display (qty 6, flat, black)
4 mm · confirmed · source
Hinge (qty 6, flat, black)
4 mm · confirmed · source
Speaker (qty 2, flat, black)
4 mm · confirmed · source
System board (qty 2, flat, black)
4 mm · confirmed · source
Unspecified (qty 2, flat, black)
4 mm · confirmed · source
I/O board (qty 3, silver, Phillips)
4 mm · confirmed · source
System board (qty 3, silver, Phillips)
4 mm · confirmed · source
Palm rest (qty 4, silver, Phillips)
4 mm · confirmed · source