Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and `sigma`_t = Permissible tensile stress for plate material)

The buttress
threads have low frictional resistance characteristic of the square
threads and have the same strength of V-threads

The railway carriage couplings have

A key is normally made from a cold rolled mild steel bars.

.A key way lowers

A locking device extensively used in automobile industry is a

.The algebraic difference between the actual size and the corresponding basic size is called actual deviation.

The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)