The Machine Key 1/4 x 1/4 x 1-3/8 Form B is a precision-engineered key made from SS316 stainless steel, designed for use in mechanical assemblies. With dimensions of 1/4 x 1/4 inches and a length of 1-3/8 inches, this undersized key provides a secure fit in keyways, ensuring proper alignment and torque transmission. Its SS316 construction offers excellent corrosion resistance, making it suitable for marine and harsh environments. This key meets industry standards for quality and performance, ensuring reliable operation in machinery.