10D47 (BNT1853  Key Washer A)

Genuine Shimano Key Washer A (part #10D47, BNT1853) — this keyed washer is positioned within the drag stack to prevent the drag washers from spinning freely, maintaining proper alignment under load so the drag system delivers smooth, consistent resistance. A worn or damaged key washer allows the drag washers to rotate out of position, causing erratic drag pressure and unpredictable line release. Cross-references with Shimano part numbers 10D47 and BNT1853. OEM replacement ensures perfect fit and factory performance. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano reel parts.