The Washer (OEM Part No. 3128309790) is a spare part compatible with Meishan M4C, Macheng E70, Dominican M4C, Simba E7C, M40S, M4C, Simba H1354, SIMBA H1254, and M4C ITH underground drilling rigs. Manufactured from durable steel, it is designed as a mechanical component for the washer assembly position in fastening and load distribution systems. The washer provides proper load distribution, improves fastening stability, and helps protect connected components from damage during operation. Its reliable construction ensures accurate fitting, long service life, and dependable performance in demanding underground mining environments.