diff --git a/src/textual/widgets/_data_table.py b/src/textual/widgets/_data_table.py
index b8f208eb3..227b91e35 100644
--- a/src/textual/widgets/_data_table.py
+++ b/src/textual/widgets/_data_table.py
@@ -36,7 +36,7 @@ class CellDoesNotExist(Exception):
 
 
 # TODO: Revisit?
-class Key(NamedTuple):
+class StringKey(NamedTuple):
     value: str | None
 
     def __hash__(self):
@@ -70,7 +70,7 @@ def default_cell_formatter(obj: object) -> RenderableType | None:
 class Column:
     """Table column."""
 
-    key: Key
+    key: StringKey
     label: Text
     width: int = 0
     visible: bool = False
@@ -93,7 +93,7 @@ class Column:
 class Row:
     """Table row."""
 
-    key: Key
+    key: StringKey
     index: int
     height: int
     y: int
@@ -467,7 +467,7 @@ class DataTable(ScrollView, Generic[CellType], can_focus=True):
         """
         text_label = Text.from_markup(label) if isinstance(label, str) else label
 
-        column_key = Key(key)
+        column_key = StringKey(key)
         content_width = measure(self.app.console, text_label, 1)
         if width is None:
             column = Column(
@@ -502,7 +502,7 @@ class DataTable(ScrollView, Generic[CellType], can_focus=True):
             key: A key which uniquely identifies this row. If None, it will be generated for you. Defaults to None.
         """
         row_index = self.row_count
-        row_key = Key(key)
+        row_key = StringKey(key)
 
         self.data[row_index] = list(cells)
         self.rows[row_index] = Row(row_key, row_index, height, self._line_no)
diff --git a/tests/test_data_table.py b/tests/test_data_table.py
index 6c1945215..cf5a4e25d 100644
--- a/tests/test_data_table.py
+++ b/tests/test_data_table.py
@@ -2,7 +2,7 @@ from textual.app import App
 from textual.coordinate import Coordinate
 from textual.message import Message
 from textual.widgets import DataTable
-from textual.widgets._data_table import Key
+from textual.widgets._data_table import StringKey
 
 
 class DataTableApp(App):
@@ -152,13 +152,13 @@ async def test_clear():
 
 def test_key_equals_equivalent_string():
     text = "Hello"
-    key = Key(text)
+    key = StringKey(text)
     assert key == text
     assert hash(key) == hash(text)
 
 
 def test_key_doesnt_match_non_equal_string():
-    key = Key("123")
+    key = StringKey("123")
     text = "laksjdlaskjd"
     assert key != text
     assert hash(key) != hash(text)
@@ -169,9 +169,9 @@ def test_key_string_lookup():
     # in tests how we intend for the keys to work for cache lookups.
     dictionary = {
         "foo": "bar",
-        Key("hello"): "world",
+        StringKey("hello"): "world",
     }
     assert dictionary["foo"] == "bar"
-    assert dictionary[Key("foo")] == "bar"
+    assert dictionary[StringKey("foo")] == "bar"
     assert dictionary["hello"] == "world"
-    assert dictionary[Key("hello")] == "world"
+    assert dictionary[StringKey("hello")] == "world"