CRC 1030739 Extra Lock is a 50 ml green anaerobic screw and nut locking adhesive for securing threaded assemblies against vibration loosening. The liquid formulation cures in the absence of air between metal parts, with a maximum bonding gap of 0.25 mm and service temperature up to 150 °C. Supplied in 50 g net, in cartons of 12. Typical uses include machine screws, bolts, and fasteners in assembly, maintenance, and repair.