ductile materials

brittle materials

elastic materials

all of the above

has a head on one end and a nut fitted to the other

has head at one end and other end fits into a tapped hole in the other part to be joined

has both the ends threaded

has pointed threads

ISO metric thread

acme thread

square thread

buttress thread

60°

55°

47°

29°

provide cushioning effect

provide bearing area

absorb shocks and vibrations

provide smooth surface in place of rough surface