screwfitmentdatabase

M1.6 x 4mm screws — what they fit & where to buy

28 sourced applications in this database list a M1.6 screw at 4 mm (or a length range that includes it), most of them in phones, tablets & wearables. A M1.6 x 4mm screw has a 0.35 mm coarse pitch, so a fully engaged 4 mm shank gives about 11.4 thread turns (2.5× the diameter).

Buy M1.6 x 4mm screws

TechSpareWarehouse stocks 7 M1.6 x 4mm listings (black, Phillips flat/low-profile head), most named for the exact device they fit.

All 7 M1.6 x 4mm at TechSpareWarehouseOur eBay store (10 M1.6 x 4mm listings)Search Amazon for M1.6 x 4mm

On eBay: M1.6 x 4mm Phillips Flat Head Micro Screws LCD Shell Repair 10-Pack

Search tip: stores list these as “M1.6 x 4mm screw”. Check the thread and length against your old screw before ordering.

Disclosure: TechSpareWarehouse is our own parts store — we earn from these sales. As an Amazon Associate we also earn from qualifying purchases. Fitment data on this site is not changed by what we stock.

M1.6 x 4mm specs

Thread
M1.6 × 0.35
Length
4 mm
Thread turns
≈ 11.4
Length ÷ diameter
2.5×
Tap drill
1.25 mm
Clearance (close)
1.7 mm
Phillips
PH00
Torx / hex
T4–T5 / 1.5 mm

Length is measured from under the head for pan, wafer and button heads, and overall for flat (countersunk) heads. Neighbouring sizes we track: M1.6 x 3 mm (40 applications).Going 0.5 mm too long can bottom out in a blind boss or touch a board underneath.

Where M1.6 x 4mm screws are used

  • Phones, Tablets & Wearables7
  • Cameras & Optics5
  • Drones, RC & Gimbals4
  • Eyewear2
  • Medical & Laboratory2
  • Standards & References2
  • Laptops & PCs2
  • Electronics, Racks & Enclosures1

Devices that use M1.6 x 4mm screws (28)

BETAFPV Meteor whoops (alt size)

motor fixing screws, alternative to M1.4x3

4mm · confirmed · source

Sunglasses & heavier metal frames

2.5 x 1.6 x 4.0mm sunglasses hinge screw standard

4mm · confirmed · source

Watch bracelets & casebacks

2.0mm-head mini screws sold with 1.2/1.4mm variants

2-4mm · reported · source

RC micro helicopters

frame and linkage hardware in bulk metric kits

2-5mm · reported · source

Camera lens assemblies

lens barrel and aperture ring retaining screws

2-4mm · reported · source

Arduino / PCB standoffs

general electronics assembly and DIY project boards

3-8mm · confirmed · source

Eyeglass hinge screw (heavier frames)

thick acetate and rimless frame hinges, per ISO 11381

3-5mm · confirmed · source

Microscope stage clip / condenser

holds the specimen stage clips or condenser assembly

3-6mm · reported · source

Dental handpiece head

secures the rotating head on a dental drill

3-6mm · reported · source

Compact smart sensor PCBs

Internal PCB mounting inside small sensors

3-5mm · reported

iPad Pro 11-inch internal brackets

Logic board and battery bracket screws

2-4mm · reported · source

Kindle e-reader internals

Board and frame retention screws

3-5mm · reported · source

BetaFPV whoop motor screws (larger variant)

M1.6x4mm motor fixing screws for whoop-class motors

4mm · confirmed · source

DIN 912 socket-head cap screw

0.35mm pitch, head diameter from 2.86mm

2-12mm · confirmed · source

DIN 965 / ISO 7046 countersunk Phillips screw

Head 3.0mm diameter, 0.96mm high — the countersunk profile for micro fasteners

2-10mm · confirmed · source

Steam Deck (LCD) Type 7 fastener

1.6mm diameter, 0.53mm pitch plastic thread-forming screw

4mm · confirmed · source

Valve Steam Deck (LCD)

Official iFixit-measured screw ID guide lists multiple M1.6 fastener types used throughout the Steam Deck: Type 1 M1.6x9 plastic thread-forming, Type 2 M1.6x5 machine screw, Type 4 M1.6x4.5 plastic thread-forming, Type 5 M1.6x3 machine screw, Type 7 M1.6x4 plastic thread-forming

3mm, 4mm, 4.5mm, 5mm, 9mm · confirmed · source

BETAFPV Meteor/Air series tiny-whoop motor screws

Listing explicitly gives motor fixing screw sizes 'M1.4-3, M1.6-4' (M1.6 x 4mm) for BETAFPV Meteor/Air/Cetus brushless whoop motors

M1.6x4 · reported · source

NBK SSCZS miniature captive screw for precision instruments

M1.6 nominal thread offered within NBK SSCZS miniature captive screw range for precision-instrument assemblies

4-10mm · confirmed · source

MacBook Air 13-inch 2017 (A1466) fan-to-top-case screw

Apple official screw chart lists part 922-9657 as 'Screw, Torx T5, M1.6 x 4.1, H3.2' for fan attachment under I/O cable

4.1mm · confirmed · source

Precision instrument hex socket head screws (used in cameras/electronics repair)

NBK catalog SNSS miniature hex socket head cap screw series explicitly offers M1.6 nominal thread with selectable lengths 2-12mm

2-12mm · confirmed · source

Spectacle frame hinge screws (ISO 11381 standard)

ISO 11381:2016 specifies M1.6 x 0.35 as one of the standard ophthalmic screw thread sizes for spectacle frames

2-5 mm (standard range) · confirmed · source

EM-Tec SEM sample holder screw set

M1.6 x 4mm and M1.6 x 6mm socket cap screws for electron-microscope stage inserts

4-6mm · confirmed · source

PW-Sat2 CubeSat fastener bill of materials

M1.6 x 3mm and M1.6 x 5mm screws listed in the structure fastener table

3-5mm · confirmed · source

NBK SPE-MC PEEK micro pan head screws

M1.6 PEEK micro pan head screws, 1.5-6mm lengths, for precision instrument and sensor assembly where metal screws are unsuitable

1.5-6mm · confirmed · source

EM-Tec SEM sample holders

M1.6C replacement socket cap screw set, M1.6x4mm and M1.6x6mm stainless

4mm, 6mm · likely · source

Valve Steam Deck (LCD)

case and board screws in several lengths

3, 4, 4.5, 5 and 9mm · confirmed · source

Framework Laptop 12

fastener kit screw (official Framework fastener kit) — T5 head, 4.0mm long (official fastener guide)

4.0mm · confirmed · source