Product Description
Shimano 10T4K Left Side Plate Assy (BNT6810) | Tranx 300 & 400 Series
The Shimano 10T4K Left Side Plate Assembly (BNT6810) is a complete external housing component for the palm side of Shimano's Tranx 300 and 400 series baitcasting reels. This assembly serves as the "palm" cover, protecting the internal spool and centrifugal braking system while providing a comfortable ergonomic grip for the angler.
In Shimano’s current inventory system, 10T4K is the global part number that consolidates and replaces the legacy BNT6810 specification.
Product Specifications
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Part Name: Left Side Plate Assembly / Palm Side Plate
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Shimano Part Number: 10T4K
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Legacy Part Number: BNT6810
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Compatibility: Right-Handed (RH) Reels only (The palm side is the left side).
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Function: Houses the braking system and provides structural protection for the spool.
Compatible Reel Models
The 10T4K is a precision-fit part for the larger A-series Tranx frames. It is a direct replacement for:
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Shimano Tranx 300 A (TRX300A)
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Shimano Tranx 300 AHG (TRX300AHG)
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Shimano Tranx 400 A (TRX400A)
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Shimano Tranx 400 AHG (TRX400AHG)
Technical Note: This part is not compatible with the 301 or 401 (Left-Hand) models, as the side plate mounting and braking orientation are mirrored. If you have a left-handed reel, you would typically look for BNT6818 or 100NR.
What’s Included in the "Assembly"?
Unlike the bare side plate (101UH), the 10T4K assembly is designed for a "drop-in" replacement and typically includes:
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The Side Plate Frame (Composite/Alloy).
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Side Plate Cam Lever (1019B) for opening the plate.
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Internal Brake Case and Brake Pipe.
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Ball Bearing (105C2 or 105BT) to support the spool shaft.
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Seal/O-Rings and necessary internal mounting screws.
Maintenance & Installation Recommendation
Because the side plate is frequently opened to adjust the VBS (Centrifugal Brake) weights, the internal bearing and moving parts are exposed to moisture and debris. We recommend Deuthlon Lubricants:
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For the Side Plate Bearing: Apply one drop of Deuthlon Power Cast Oil. This keeps the bearing spinning with zero resistance, which is vital for the long-distance casting the Tranx is designed for.
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For the Cam Lever & Latch: Apply a tiny dab of Deuthlon Reel Gear Grease to the locking mechanism. This ensures the plate opens and closes smoothly and prevents the lever from seizing due to salt buildup.
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Pro Tip: If the assembly is out of stock (common for this part), you can often rebuild your existing one by purchasing the bare Left Side Plate (101UH) and transferring your old bearings and pins over.
Why Choose Genuine Shimano 10T4K?
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Watertight Integrity: Guaranteed to seat flush against the Frame (10QVD), preventing saltwater from reaching the main gears.
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Perfect Brake Alignment: The internal brake pipe is factory-aligned to ensure your centrifugal weights engage evenly, preventing erratic "bird's nests" during the cast.
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Impact Resistance: Engineered with the specific material density required to handle the torque of heavy swimbaits and high-pressure hooksets.
