101MC (RD21637 Handle Screw Cap)

Genuine Shimano handle screw cap (part #RD21637, SKU 101MC) — the threaded cap that secures the handle assembly to the reel body on your spinning reel. This cap covers and protects the handle retaining bolt while providing a clean, finished appearance. A lost or stripped handle screw cap leaves the retaining bolt exposed to saltwater corrosion and can allow the handle to loosen during use. Cross-references with Shimano part number RD21637. OEM replacement ensures proper thread engagement, a snug fit, and corrosion-resistant protection for your handle connection. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano spinning reel parts and professional reel service.