Weld in mild steel O2 sensor bung. 18x1.5mm thread.
Weld in mild steel stepped O2 sensor bung. 18x1.5mm thread.
Weld in stainless steel O2 sensor bung. 18x1.5mm thread.
Weld in stainless steel stepped O2 sensor bung. 18x1.5mm thread.
Steel O2 sensor plug. 18x1.5mm thread.