5 mm.(9/16"-18UNF) - 9/16"MPM 1500 Bar Product description Adapter various applicationsConnections : 5 mm.(9/16"-18)M Type M - 9/16"MP maleDimensions : Hex 7/8"x 2,063" ( ± 52,4 mm.)Material : st. steelPart number : 21-007-003