The utility model relates to a screw, in particular to a universal type screw capable of preventing machinery from being damaged. According to the technical scheme, the screw comprises a screw body and a screw cap, the screw cap is of a hard hexagonal structure, the lower portion of the screw cap is connected with the screw body, threads are machined on the surface of the screw body, the top face of the screw cap is machined into an outer hexagonal face, an inner hexagonal groove opening is formed in the outer hexagonal face, a concave screw driver opening is formed in the inner hexagonal groove opening, and a standby torsion hole is formed in the side wall of the screw cap. The universal type screw has the advantages that a hexagonal screw driver can be used for fixing a screw outer hexagon to screw the screw, an inner hexagonal screw driver, a slot type screw driver and a Philip type screwdriver can also be used for screwing the screw, when the screw cap is damaged by abrasion, a torsion rod can be used for being inserted into the standby torsion hole in the bottom of a nut to loosen the screw, the structure is reasonable, convenience and practicability are achieved, universality is high, replaceability is high, and stability is good.