Adding ISOThread and UNC Thread

app/models/__init__.py

@@ -1,15 +1,19 @@
 """Import all models so they register with ``Base.metadata``."""
 
 from app.models.associations import role_permissions, user_roles
+from app.models.iso_thread import IsoThread
 from app.models.permission import Permission
 from app.models.refresh_token import RefreshToken
 from app.models.role import Role
+from app.models.unc_thread import UncThread
 from app.models.user import User
 
 __all__ = [
+    "IsoThread",
     "Permission",
     "RefreshToken",
     "Role",
+    "UncThread",
     "User",
     "role_permissions",
     "user_roles",

app/models/iso_thread.py

@@ -0,0 +1,13 @@
+from sqlalchemy import Float
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+
+
+class IsoThread(Base):
+    __tablename__ = "iso_threads"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    diameter_mm: Mapped[float] = mapped_column(Float, nullable=False)
+    pitch_mm: Mapped[float] = mapped_column(Float, nullable=False)
+    depth_mm: Mapped[float | None] = mapped_column(Float, nullable=True, default=None)

app/models/unc_thread.py

@@ -0,0 +1,24 @@
+import enum
+
+from sqlalchemy import Enum, Float, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+
+
+class UncSeries(str, enum.Enum):
+    UNC = "UNC"
+    UNF = "UNF"
+    UNEF = "UNEF"
+    UN = "UN"
+    UNS = "UNS"
+
+
+class UncThread(Base):
+    __tablename__ = "unc_threads"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    diameter_fraction: Mapped[str] = mapped_column(String(16), nullable=False)
+    tpi: Mapped[int] = mapped_column(Integer, nullable=False)
+    series: Mapped[UncSeries] = mapped_column(Enum(UncSeries), nullable=False)
+    depth_in: Mapped[float | None] = mapped_column(Float, nullable=True, default=None)