Original Makita Cap 40 — part no. 286253‑7 — a small front chuck cap that seals and protects the HR3000C’s chuck/tool‑holder assembly from dust and grease and helps retain the chuck components during disassembly.
The part is listed by Makita as "Cap 40" (commonly understood as a 40 mm size) and is supplied as a molded rubber/plastic sealing tip that fits over the tool’s front housing.
Example fit: Makita HR3000C (rotary hammer, 30 mm) — this is the original Makita replacement cap you’d order when replacing the front seal. (Makita parts part no. 286253‑7).
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