The basic Grid-Lign coupling consists of two steel shaft hubs, a high strength spring steel tapered grid element, two seals and a cover assembly. Misalignment and end float are accommodated by the sliding action of the grid in the lubricated hub grooves. Dodge Grid Coupling Hub, Rough Stock Bore Type T10/T20, 1140T Coupling, 2-5/8 to 7 in Square Key/2-5/8 to 7-1/4 in Rectangular Key Bore Dia, 10 in Hub Dia, 1650 rpm Maximum, 7.3 in Length Through Bore, Steel