Enhance the performance and reliability of your ER type tool holders with this high-quality Collet Clamping Nut, designed specifically for ER25 chucks, tool handles, tool bars, extension bars, drill bits, boring cutters, and other compatible tools. Crafted from durable 42CrMo steel, this collet nut features a hardened and precision-ground construction with a black oxide finish, ensuring strong clamping force, excellent wear resistance, and high corrosion protection for long-lasting use. Key Features: · Compatible with ER Type Tools: Perfectly suited for ER25 chucks, tool handles, tool bars, extension bars, and various cutting tools such as drill bits and boring cutters. · Strong Clamping Force: Engineered to provide a secure grip that resists deformation, maintaining tool stability during operation. · Durable Material: Made from high-strength 42CrMo steel with hardened and precision-ground surfaces, delivering superior wear resistance and corrosion protection. · Black Oxide Finish: Enhances surface hardness and prevents rust, extending the service life of the nut. · High Balance Precision: Designed with better balance accuracy than standard nuts, improving machine performance and reducing wear and friction. · Easy Replacement: Ideal as a direct replacement for broken or worn collet nuts, fitting most standard tool holders. Specifications: · Material: 42CrMo Steel · Weight: 130g · Color: Black or White · Size: Approximately 4.5 x 4.5 x 2.5 cm (1.77 x 1.77 x 0.98 inches) · Thread: M32 x 1.5 · Nut Diameter: 42 mm · Nut Height: 21 mm (standard or lengthened options available) Package Includes: · 1 x Collet Clamping Nut This collet nut is an essential accessory for professionals seeking enhanced tool holding stability, durability, and precision. Its robust construction and corrosion-resistant finish ensure reliable performance in demanding machining environments, helping to extend the lifespan of your equipment and maintain optimal operational efficiency. Please verify compatibility with your specific tool holder before purchase.