Metric Two-Piece Industry Standard Clamping Couplings, 20mm, Black Oxide Steel

Shielded Coupling used to connect 2" No Hub Cast Iron or Schedule 40 PVC to 1-1/2" Service Weight Cast Iron, Schedule 40 PVC, Steel or Extra Heavy Cast Iron.

Shielded Coupling used to connect 3" Schedule 40 PVC, Steel or Extra Heavy Cast Iron to 3" Schedule 40 PVC, Steel or Extra Heavy Cast Iron.

Metric One-Piece Industry Standard Clamping Couplings w/Keyway MISCC-Series, Climax Metal, 20mm bore, 42mm outside diameter. Black Oxide Steel Metric One-Piece Industry Standard Clamping Coupling with Keyway. High axial load & torque capacity. Does not mar the shaft.