A temporary fastening tool has a tool main body, a grip, a transmission mechanism, a socket, a plurality of pins, and two magnets. At least a portion of a side surface of the pin protrudes from an inner surface section of the socket toward a central axis of the socket. The magnets are disposed such that centers of the magnets are disposed outside of an imaginary circle having a radius of a circle that circumscribes an outer circumferential section of a screwing member that includes corner sections. The magnets are disposed at positions that do not overlap the pins when the socket is seen from a side of an opening section.

A tool socket contains: a body and an elastic operation assembly accommodated in the body. The body includes an accommodation groove and a fitting orifice. The elastic operation assembly includes a locking seat having multiple apertures. The accommodation groove has a hexagonal wall, six toothed spaces, any two inverted isosceles-trapezoid projections on each of six sides of a hexagonally wall thereof, and an isosceles trapezoid space for separating said any two inverted isosceles-trapezoid projections. The locking seat is formed in a toothed hexagon shape and has six toothed bulges corresponding to the six toothed spaces of the body individually, any two inverted isosceles-trapezoid recesses on each of six sides thereof, and an isosceles trapezoid projection configured to separate said any two inverted isosceles-trapezoid recesses. Said any two inverted isosceles-trapezoid recesses correspond to said any inverted isosceles-trapezoid projections separately, and the isosceles trapezoid projection corresponds to the isosceles trapezoid space.

A self-forming socket assembly includes a socket having an operational end and a connection end. A recess is defined in the operational end and a passage is defined in the connection end and communicates with the recess. A board is rested on a shoulder in the recess and includes a central hole and multiple bores. Each bore has a gripping pin retractably inserted therein, and includes a polygonal section. A bit movably extends through the passage of the socket and the central hole of the board. The bit is positioned in the central hole of the board or positioned to protrude beyond the recess.

A temporary fastening tool has a tool main body, a grip, a transmission mechanism, a socket, a plurality of pins, and two magnets. At least a portion of a side surface of the pin protrudes from an inner surface section of the socket toward a central axis of the socket. The magnets are disposed such that centers of the magnets are disposed outside of an imaginary circle having a radius of a circle that circumscribes an outer circumferential section of a screwing member that includes corner sections. The magnets are disposed at positions that do not overlap the pins when the socket is seen from a side of an opening section.

A tool and method for loosening, for example, a nut connecting an HP rotor to an intermediate housing of a twin-shaft turbojet engine and forward fan including an LP turbine module, an HP module with an upstream journal of the HP rotor, and an intermediate housing with a support bearing of the HP rotor journal. The journal is held in the bearing by the connecting nut. The method includes inserting the tool for loosening the connecting nut after having cleared access to the nut. The loosening tool includes a tube and a plurality of fingers retractable between a position in which they are housed in the tube and a position in which they are deployed radially. The tool is installed with the retractable fingers deployed and in contact with all of teeth of the nut, and an unscrewing rotational torque is then applied to the tool.