The Makita 213962-5 is a genuine OEM replacement O ring designed to restore reliable sealing performance in Makita HR4001C and HR4011C SDS-plus hammer drills. Engineered to the same tolerances as the original factory component, this O ring provides a precise fit within the tool's internal mechanism. Its round cross-section is optimised for sealing grooves in the rotating and reciprocating assemblies typical of heavy-duty hammer drills, where consistent sealing is critical to performance. Made from hard-wearing rubber, the O ring is built to withstand repeated impact cycles and the demands of professional site use. It works to prevent grease loss and dust ingress — two of the most common causes of reduced impact energy and premature internal wear in hammer drills. Using a genuine Makita part ensures correct material specification and dimensional accuracy, which aftermarket alternatives may not match. This makes it a straightforward, cost-effective solution during routine servicing, helping to restore factory performance and avoid more costly repairs further down the line. Features and Benefits: • Genuine Makita OEM part (MPN: 213962-5) for assured compatibility • Precision fit for HR4001C and HR4011C hammer drill mechanisms • Hard-wearing rubber construction suited to repeated impact cycles • Prevents grease leaks and dust ingress to protect internal components • Helps restore stable impact energy and drilling performance • Cost-effective component for routine servicing and maintenance
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