What size screw does Keychron K3 / K3 Pro / K3 Max use?

M2 × 6 mm for case screws, 3.5mm head diameter.

How long are the screws in Keychron K3 / K3 Pro / K3 Max?

The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

What is the thread pitch of an M2 screw?

0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.

What screwdriver do I need for Keychron K3 / K3 Pro / K3 Max?

The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.

Can I use an imperial screw instead of M2?

No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Keychron K3 / K3 Pro / K3 Max?

TechSpareWarehouse (our own store) lists M2 x 6mm, which matches the length in the records above.

Keychron K3 / K3 Pro / K3 Max screw size

M2 · 6 mm long

The screws used on Keychron K3 / K3 Pro / K3 Max are M2, 6 mm long.

The record covers case screws, 3.5mm head diameter.

This entry is marked confirmed and comes from keychron.com.

An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.

Keychron K3 / K3 Pro / K3 Max 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
M2	6 mm	0.4 mm	not stated	not stated	case screws, 3.5mm head diameter	Confirmed

Fitment records and sources

M26.0mmconfirmed

case screws, 3.5mm head diameter

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

Source

How to check the screw before you buy

Consoles and controllers often use security drives (tri-wing, Torx) and short screws into plastic bosses, so do not over-tighten.
Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.4 mm from one thread crest to the next (25 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 record states 6 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
Driver: the source does not name the drive. Standard M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2

Olympus part codes like 3PUK2X8SA encode diameter x length by convention, not by an ISO stamp — verify with a thread gauge before ordering.
M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.

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.

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The same screw also fits

Devices whose records share a thread with Keychron K3 / K3 Pro / K3 Max, closest length match first.

HTC Vive controller also M2 × 6 mm
Meta Quest 2 controller also M2 × 6 mm
Valve Index controller (Knuckles) also M2 × 6 mm
Valve Index headset face gasket mount also M2 × 6 mm
Xbox One wireless controller also M2 × 6 mm
Xbox Elite Series 2 controller also M2 × 6 mm
Sony PSVR headset also M2 × 6 mm
Lenovo ideapad 520S-14IKB also M2 × 6 mm

Questions about Keychron K3 / K3 Pro / K3 Max screws

What size screw does Keychron K3 / K3 Pro / K3 Max use?: M2 × 6 mm for case screws, 3.5mm head diameter.
How long are the screws in Keychron K3 / K3 Pro / K3 Max?: The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
What is the thread pitch of an M2 screw?: 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
What screwdriver do I need for Keychron K3 / K3 Pro / K3 Max?: The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
Can I use an imperial screw instead of M2?: No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Keychron K3 / K3 Pro / K3 Max?: TechSpareWarehouse (our own store) lists M2 x 6mm, which matches the length in the records above.

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