SCREW; HEXAGON SOCKET, M6X55MM, GR 12.9. LENGTH: 55 MM, MATERIAL GRADE: 12.9, DIAMETER: M6, HEAD: HEXAGON SOCKET; USED FOR CAST FILM ANALYZER ALFA, MODEL NO: ME20, TAG NO:3-PET-PT-572, SERIAL NO: MEV3-0114349. MPN code: 2001351018, Manufacture Part No: 555-003690, Mfr Country: DE, Mfr Name: OCS OPTICAL CONTROL SYSTEMS GMBH