Liner and coupler components are critical to the safe connection and efficient transmission of forces between railway wagons. The coupler assembly—comprising elements such as the coupler body, knuckle pin, yoke pin, locking mechanism, and draft gear—ensures secure coupling and smooth transfer of traction and braking forces. Liners, including side frame friction liners and striker casting wear plates, play a vital role in reducing wear, maintaining alignment, and enhancing the longevity of wagon structures under heavy loads and dynamic conditions.