The Allegheny 20863ZFV is a 3-inch steel Mark II grooved coupling with golden zinc flake coating and an EverGreen FKM gasket for tank trailer applications. This coupling provides a quick and secure connection for grooved pipe systems. Constructed from 10-gauge steel with zinc flake coating for corrosion resistance, the 20863ZFV accommodates pipe misalignment and reduces vibration in tank trailer piping systems. The FKM gasket offers excellent chemical resistance for demanding applications. Maximum torque for bolts is 30 ft-lbs.