The Washer (OEM Part No. 3128209401) is a mechanical fastening and spacing component compatible with Epiroc underground mining equipment, including M2D, 235 Bolter, Boltec-MC, Boomer L2D, BOOMER-M2C, Boomer-MD models. Manufactured from durable steel, the washer is designed to provide proper spacing, load distribution, and component support within mechanical assemblies. It helps reduce direct contact between mating parts, supports secure fastening, and contributes to stable equipment operation under demanding underground mining conditions. Designed as a replacement mechanical component, 3128209401 provides a reliable solution for routine equipment maintenance, repair, and assembly applications.