CRIME PREVENTION SCREW, EMBEDDING MATERIAL OF SCREW HEAD, SCREW-USE CRIME PREVENTION SEAT AND CRIME PREVENTION SCREW SET

摘要

A crime prevention screw that after the screw istightened in predetermined places, an embedding material isembedded in a recessed portion composed of a square socket,a hexagon socket, a cross socket or a slot formed on ascrew head so that the screw can be prevented from beingdrawn out with the intention of many pranks and malignantcrimes, and an embedding material to be used for this crimeprevention screw and the like are provided. Example ofsuch crimes are car stealing through removal of a numberplate of an automobile, resale and export of stolenautomobiles, stealing and robbery or kidnapping using astolen car, intrusion of a thief and a public enemy througha window into a house by means of drawing out of screws forfixing a grid to the window or screws for attaching a gridto a sash of the window.