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
