The Washer (OEM Part No. 3153865000) is a spare part compatible with M2D, Boomer 291, Boomer 281, Boomer L2D, Boomer M2C, S1D underground drilling rigs. Manufactured from durable alloy steel, it serves as a wear component for the fastener sealing and buffering system at the washer installation position. It provides load distribution, reduces friction, and protects connected components during assembly operation. Designed for underground mining environments, this washer offers reliable strength and durability. Precise OEM dimensions ensure proper fitting and stable equipment performance.