What size screw does ESP32 DevKit boards use?

M3 × 6–8 mm for corner mounting holes on common dev boards.

How long are the screws in ESP32 DevKit boards?

The records range from 6 to 8 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M3 screw?

0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.

What screwdriver do I need for ESP32 DevKit boards?

The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.

Can I use an imperial screw instead of M3?

No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for ESP32 DevKit boards?

TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

ESP32 DevKit boards screw size

M3 · 6 to 8 mm long

If you are replacing a screw on ESP32 DevKit boards, the thread is M3 in lengths from 6 to 8 mm.

The record covers corner mounting holes on common dev boards.

This entry is marked reported and comes from espressif.com.

An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

ESP32 DevKit boards screw specifications

One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.

Thread	Length	Pitch	Head	Drive	Where it goes	Status
M3	6–8 mm	0.5 mm	not stated	not stated	corner mounting holes on common dev boards	Reported

Fitment records and sources

M36-8mmreported

corner mounting holes on common dev boards

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

How to check the screw before you buy

Printer and CNC builds usually publish a bill of materials; when it lists a length, follow it, since extrusion T-nuts and motor faces have fixed thread depths.
Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.5 mm from one thread crest to the next (20 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
The records span 6–8 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
Tightening: no device-specific torque is published in these records. The site's general figure for M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M3

M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.

Pitch gauge · Screw size finder · Torque guide

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.

More in 3D Printing, CNC & Robotics

2020 extrusion T-nuts (light duty)2020 extrusion T-nuts (standard)2020 T-slot hammer head bolts 2020/2040 extrusion end tap 2040 extrusion T-nuts 3030 extrusion T-nuts (heavy duty)3030/4040 extrusion end tap 3D printer & CNC enclosures 3D printer hotend to X-carriage Actobotics servo horn / hub Arduino Mega 2560 mounting holes Arduino shield stacking standoffs

Browse all 149 in 3D Printing, CNC & Robotics →

The same screw also fits

Devices whose records share a thread with ESP32 DevKit boards, closest length match first.

Arduino Mega 2560 mounting holes also M3 × 6–8 mm
Ender 3 V2 hotend and hotend cover also M3 × 6–8 mm
NEMA 23 stepper motor, 3A variant also M3 × 6 mm
Arduino Uno / Mega mounting holes also M3 × 6–8 mm
NEMA 17 stepper motor mounting also M3 × 8 mm
OpenBeam / MakerBeam 15x15 mm extrusion also M3 × 6 mm
Voron 2.4 electronics bay also M3 × 6–8 mm
RatRig V-Core 3.1 X-axis assembly also M3 × 8 mm

Questions about ESP32 DevKit boards screws

What size screw does ESP32 DevKit boards use?: M3 × 6–8 mm for corner mounting holes on common dev boards.
How long are the screws in ESP32 DevKit boards?: The records range from 6 to 8 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M3 screw?: 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
What screwdriver do I need for ESP32 DevKit boards?: The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
Can I use an imperial screw instead of M3?: No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for ESP32 DevKit boards?: TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

Heads up: shipping delay