The Insulator (OEM Part No. 3217997813) is an electrical spare part compatible with Epiroc underground mining equipment, including M4C, M40S, EST 1030, Boomer 291, EST-2D, M2C, S1D, and T1D New models. Manufactured from high-strength insulating material, it functions as an electrical insulation and protection component installed in the electrical assembly. The insulator helps prevent electrical contact issues, improves component safety, and supports stable equipment operation. Designed for harsh underground mining environments, this replacement electrical component provides reliable insulation performance, excellent durability, and long service life for drilling and bolting equipment maintenance applications.