The Machine Key M4 x 4 x 25 Form B is a high-quality stainless steel component designed for reliable power transmission in machinery. With dimensions of 4 mm in width, 4 mm in height, and 25 mm in length, this undersized key fits securely into keyways, ensuring optimal engagement between rotating parts. Made from SS 300 stainless steel, it offers excellent corrosion resistance and durability, making it ideal for use in harsh environments. This machine key complies with industry standards, ensuring consistent performance and reliability in various mechanical applications.