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Metal part, composed of a head and a partially or completely threaded shank, used to secure fastenings and assemblies.

See screw in : french | spanish

Spiral protrusion on the shank’s surface, for driving the screw into a solid material by turning.

Nonthreaded part of a screw’s shank.

Notch in the head into which a corresponding screwdriver tip can be inserted.

Broadened end of the screw, whose shape and slot vary.

Part composed of a bolt with wings that deploy inside the wall to ensure a solid fastening.

The spring under the wing keeps it folded along the bolt as it passes through a hole made in the wall; it then opens and acts like a nut.

Part composed of a bolt in a sheath that bends when the bolt is inserted, then flattens out against the inside of the wall.