Wurth WR-DC PCB Mount DC Power Jacks - 6.4 mm Barrel DiameterPCB mount DC power jacks or barrel connectors with a 6.4mm barrel diameter. These PCB mount DC power jacks have an internal normally closed single switch and internal pin diameters of 2.05 mm and 2.55 mm. The stamped contacts of these DC power jacks are gold plated and the housings are made from black UL94-V0 PA66.Centre Pin Dimensions1224883 = 2.5mm1631840 = 2.5mm1224879 = 2.1mm1631836 = 2.1mm