The Rotor Clip SE-31ST ZD is a high-quality E-Style external retaining ring designed for 5/16" shaft diameters. Manufactured from carbon steel with a zinc dichromate finish, this retaining ring offers enhanced durability and corrosion resistance, making it suitable for various industrial applications. Its E-Style design features three prongs that securely fit into the groove's base, providing a robust shoulder for effective retention of assemblies. This design simplifies installation by eliminating the need for lug holes, allowing for easy application using standard retaining ring applicators. The SE-31ST ZD is engineered to accommodate lower thrust loadings compared to axial retaining rings, offering an economical alternative for applications where such loadings are sufficient. With a groove diameter of 0.25 inches, groove width of 0.029 inches, and groove depth of 0.031 inches, it ensures a precise fit within the groove, maintaining the integrity of the assembly. The ring's free diameter is 0.243 inches, and its thickness is 0.025 inches, aligning with standard specifications for similar retaining rings. The zinc dichromate finish not only provides a protective layer against corrosion but also imparts a distinctive yellow color, aiding in visual identification during maintenance or assembly processes. This retaining ring is interchangeable with other industry-standard parts, such as Waldes Truarc X5133 31, IRR 1000 X31, and Anderton N1500 X031, ensuring compatibility across various applications. By incorporating the Rotor Clip SE-31ST ZD retaining ring into your assemblies, you can achieve reliable component retention, reduce maintenance downtime, and enhance the overall performance and longevity of your equipment.