| Powertype: | Steam |
| SEK Class Κγ | |
| Builddate: | 1929 |
| Totalproduction: | 20 |
| Whytetype: | 0-10-0 |
| Uicclass: | E h2 |
| Driverdiameter: | 1300frac=8NaNfrac=8 |
| Length: | 18.03frac=8NaNfrac=8 |
| Fueltype: | Coal |
| Cylindercount: | Two |
| Cylindersize: | 575x |
| Firearea: | 3.2m2 |
| Boilerpressure: | 14kg/cm2 |
| Totalsurface: | 150m2 |
| Superheaterarea: | 45m2 |
| Operator: | SEK |
| Fleetnumbers: | 861–880 |
SEK (Sidirodromoi Ellinikou Kratous, Hellenic State Railways) Class Κγ (or Class Kg; Kappa-gamma) is a class of 20 0-10-0 steam locomotives purchased from four Belgian locomotive manufacturers in 1929.
They were given the class letters "Kg" and numbers 861 to 880.