The bolt identified by code number K 31022 is specifically designed to fasten the crankshaft counterweight (K 31020) in place within the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 diesel engine. This high-strength fastener plays a vital role in maintaining the secure and precise attachment of the counterweight, ensuring balance and alignment during high-speed engine rotations. Engineered to withstand the stresses and vibrations of long-term operation, the bolt’s reliability is essential for engine stability. Regular inspection and proper torque application during assembly are crucial to prevent loosening or mechanical failure.