Outer plate (outer sideplate). Which serves as a connector between pins, its position is on the outer.
In the plate (inner sideplate). Which also serves as a connector between pins, but its position is inside.
Pin. It serves as a "wheels as" chain.
Roller. If this is the part that is in direct contact with the sprocket teeth.
Bos (bushing). This is a cushion between rollers with pins, the pins are not directly rubbing against the roller.
