screw thread

n. outer spiral ridge that forms a screw

A screw thread is a helical or tapered structure used to convert between rotational and linear movement or force.Screw threads have several applications:Fasteners such as wood screws, machine screws, nuts and bolts. Connecting threaded pipes and hoses to each other and to caps and fixtures.The worm gear and similar mechanical connections, used particularly in adjustment mechanisms.Converting rotary motion to linear motion, for lifting or moving objects, as in a leadscrew or screw jack
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Noun
1. the raised helical rib going around a screw
(synonym) thread
(hypernym) rib
(part-holonym) screw

screw-thread /'skru:θred/
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