Metal flex couplings are disc type couplings in which several flexible metallic elements are alternately attached with bolts to opposite flanges. As polymeric elastomer is replaced by metal disc, Metal Flex coupling provides excellent temperature capability without sacrificing angular and axial misalignment. The coupling provides low axial and bending stiffness while possessing high torsional rigidity. The stretched shim pack design of UTL Metal Flex couplings provides zero backlash. UTL Metal Flex couplings are available up to 13367 Nm torque with single shim pack (UMK) and double shim pack (UMS) series.