Material and size Material: 65Mn spring steel — durable, elastic construction suitable for repeated use. Outer diameter: 12 mm Inner diameter: 6 mm Key benefits Corrosion and oxidation resistant: designed to resist rust and oxidation, extending service life in typical environments. Acid-resistant performance: offers protection against mild acidic exposure, helping maintain part integrity. Reliable spring properties: 65Mn spring steel provides good shape retention and consistent mechanical performance where spring action or retention force is required. Easy to store and use: compact dimensions and stable material make handling, inventorying, and installation straightforward. Function and compatibility Functions as a small retaining/locking spring element for assemblies that match the specified inner and outer diameters. Compatible with shafts, bores, or components that require a 6 mm inner fit or 12 mm outer envelope. Verify mating part dimensions before installation. Practical applications Small mechanical assemblies: securing miniature shafts, pins, or bearings in hand tools, instruments, or small motors. Electronics and appliances: retaining components in compact housings where space is limited and corrosion resistance is needed. Repair and maintenance: replacement part for small assemblies that require a spring steel retaining element with the listed dimensions and material. Usage notes Confirm the 6 mm inner diameter and 12 mm outer diameter match your application before ordering. Store in a dry place to maximize long-term performance, even though the material resists oxidation and mild acids.