Visual Dictionary Online


Powered by

screwclick to hear

Metal part, composed of a head and a partially or completely threaded shank, used to secure fastenings and assemblies.
screw thread shank slot head toggle bolt spring wing expansion bolt

thread click to hear

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

shank click to hear

Nonthreaded part of a screw’s shank.

slot click to hear

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

head click to hear

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

toggle bolt click to hear

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

spring wing click to hear

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.

expansion bolt click to hear

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