Answer / c.satheeshgopalakrishna

the main difference was based on the load acting on it,and
the size.for smaller loads, screws are enough but incase of
greater-loads,bolts are to be used.

Answer / vidyasagar

Screw having greater pitch than bolt for same size.Screw can tight & loose by screw driver whereas bolt by spanner or allen key. Screw used for light laod and bolt used for haevy load.

Answer / subbu

in bolt partial portion is threaded. in screw is totally threaded and screw having one end is shorper. bolt does not having shorper edge

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