This M4 x 4 x 40 Form A machine key is manufactured from C45K steel with a zinc coating for enhanced corrosion resistance. Designed for precise fitment in keyways, it ensures effective torque transmission in various mechanical assemblies. The undersize specification allows for flexibility in applications where standard sizes may not fit. Ideal for use in motors, gearboxes, and other machinery, this key meets industry standards for quality and performance. Its robust construction guarantees longevity and reliability, making it a preferred choice for engineers and technicians.
