The Lock Sheet (OEM Part No. 3217635900) is a mechanical spare part compatible with Epiroc underground mining equipment, including FlexiROC D65 LF, M4C, M40S, Boomer XE3C, Boomer 291, Simba H1354, SIMBA H1254, Boomer 281, Boltec-MC, Boomer-281, Boomer-282, models. Manufactured from steel plate, it functions as a mechanical fixing and locking component in assembly fastening positions. The lock sheet helps secure connected parts, maintain proper alignment, and improve fastening stability during equipment operation. Designed for demanding mining environments, this replacement component provides reliable performance, durability, and long service life for equipment maintenance applications.