A Type A plug in Thailand?

Yes — it seats, though without a guaranteed earth.

your Type A
🇹🇭 Type A socket
🇹🇭 Type B socket
🇹🇭 Type C socket
🇹🇭 Type O socket
🇹🇭 Type F socket

Thailand's Type A and Type B and Type C and Type O and Type F sockets accept a Type A plug (US two-blade (NEMA 1-15)). The plug is unearthed by design, so nothing is lost in translation. The wall delivers 220 V at 50 Hz (198–242 V within tolerance) — if your device isn't rated for that (look for "100–240 V" on the brick), an adapter won't save it.

Grid facts verified against IEC World Plugs — Thailand. Physical-fit verdicts derive from pin geometry and each socket standard's acceptance list — not safety advice.