Ensure your semi is Ready for the Road Ahead with a smooth transfer of power between hydraulic components, with the Weatherhead 2.81" Female JIC 37° Flare Steel Swivel Hydraulic Coupling. To quickly connect fuel lines, pumps, and hoses, this replacement coupling is forged with a streamlined design that is fast and easy to pair. Built with a solid metal body to tolerate demanding conditions and extreme pressures. FleetPride is your First Click in Heavy Duty .