The Hitachi 1226717 is a genuine OEM retaining ring designed for various Hitachi excavators, including models ZX120, ZX130, and ZX135US. This critical component ensures the secure positioning and retention of machine parts, preventing movement and maintaining operational integrity. Manufactured to Hitachi's stringent quality standards, this retaining ring provides reliable performance and durability in demanding construction environments. With an outer diameter of 120mm, an inner diameter of 110mm, and a thickness of 5mm, it offers precise fitment for specified applications.