Crime Prevention Screw, Embedding Material Of Screw Head, Screw-Use Crime Prevention Seat And Crime Prevention Screw Set

摘要

PROBLEM TO BE SOLVED: To provide an anti-theft screw which can prevent the screw from being drawn by screw-fixing predetermined parts, and filling a recessed part comprising a square hole, a hexagonal hole, a cruciform hole, a slot or the like formed on a screw head with a filler, and the filler used for the anti-theft screw.;SOLUTION: In various kinds of screws having the recessed part 33c comprising the square hole, the hexagonal hole, the cruciform hole, the slot or the like in which a tip of a tool such as a square bar spanner and a screw driver is locked for rotation on the screw head 33b, a recessed locking part 33f is formed on a part of an inner side wall 33d of the recessed part, in which either an expanded part bucked during the filling operation, or the projection urged to the side of the filler to fill the recessed part enters a part of the filler 14 to fill the recessed part to lock the filler.;COPYRIGHT: (C)2003,JPO