Product Description
Shimano 10TUN Cast Control Cap (BNT2098)
The Shimano 10TUN Cast Control Cap (Part #BNT2098) is a high-quality OEM replacement component designed to restore precise spool tension to your Shimano baitcasting and conventional reels. Also known as the spool tension knob, this cap allows anglers to fine-tune the friction applied to the spool shaft, preventing overruns and professional "bird nests" during the cast.
Machined for a perfect grip and durable threading, this cap is essential for maintaining the "Super Free Spool" performance Shimano is known for. Whether you are throwing heavy lures or finesse baits, a responsive cast control cap is the key to distance and accuracy.
Product Specifications
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Part Name: Cast Control Cap / Spool Tension Knob
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Primary Part Number: 10TUN
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Alternate Part Number: BNT2098
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Additional Ref: 10KJZ (in specific regional catalogs)
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Diameter: Approximately 15.5mm (Standard for 400-size round reels)
Models This Part Fits
The 10TUN/BNT2098 is a widely used component across several of Shimano’s most popular round reel series. It is a direct fit for:
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Shimano Calcutta Series: CT-400, CT-400B, CT-400BSV
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Shimano Catala Series: CTL-200, CTL-300, CTL-400, CTL-401
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Shimano Cardiff: Specific 400-series regional models
Technical Note: While frequently associated with baitcasting models, always verify your specific version by checking the exploded parts diagram at www.reelschematic.com.
Key Features
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Precision Adjustment: Features internal threading designed for micro-adjustments, allowing for exact spool tensioning.
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Ergonomic Grip: Textured exterior ensures easy adjustment even with wet or gloved hands.
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OEM Reliability: Guaranteed to fit the spool shaft and side plate housing of the listed models without cross-threading or slipping.
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Corrosion Protection: Finished with marine-grade coating to resist oxidation in saltwater environments.
Maintenance & Lubrication
To prevent the threads from seizing and to ensure a smooth "click" (on models equipped with a clicker), we recommend using Deuthlon lubricants:
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Thread Protection: Apply a light film of Deuthlon Power Grease to the internal threads of the cap to prevent salt buildup and ensure smooth rotation.
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Spool Performance: If your cap houses a shim or bearing, a single drop of Deuthlon Reel Gear Oil on the contact point will reduce friction on the spool shaft during high-speed casts.
