What is M.2? Keys and Sockets Explained

Scope and location

Separating mechanical key/format, wired interface, lane implementation, clearance and firmware requirements.

Published 22 June 2026; sections on keying versus wiring, compatibility checklist, mechanical clearance and firmware. No numbered revision stated.

Open the original source

Inspected

2026-10-08

Access

public page

Recorded AI-assisted source inspection; not independent human approval or hardware testing.

Manufacturer explanatory guide, not an inspected PCI-SIG M.2 standard. Numeric notch/contact positions, marketing throughput, capacity and universal key-to-protocol rules are not adopted. No third-party illustrations are copied.

Source inspection is separate from independent technical approval, rights clearance and hardware testing.