Product Description
Ensure the structural stability of your motorcycle with the Genuine Royal Enfield Flanged Hex Bolt. This critical OEM fastener (Part No: 593021/B) is a specialized long-reach bolt used primarily for engine mounting and frame assembly on heavy-duty single-cylinder models.
Measuring an impressive 260mm in length, this M10 bolt is designed to pass through the engine-to-chassis mounting points, securing the heart of the motorcycle to the frame. As a genuine Royal Enfield part, it is manufactured to the exact metallurgy and tensile strength specifications required to manage the intense torque and vibrations of the 500cc and 350cc UCE engines. The bolt features an integrated flange that acts as a built-in washer, distributing the clamping load evenly across the frame brackets to prevent stress fractures and loosening over time. It is typically finished with a corrosion-resistant coating to ensure longevity in exposed areas of the chassis.
Key Features:
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OEM Heavy-Duty Fastener: 100% genuine Royal Enfield part, replacing the older 591440/A reference with updated factory tolerances.
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High-Tensile Performance: Specifically engineered for load-bearing positions where structural integrity is paramount.
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Extended Reach (260mm): The extra-long shank is designed for through-frame engine mounting, ensuring a solid connection between the powertrain and chassis.
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Precision Threading: Features a fine M10 x 1.25 pitch for high vibration resistance and precise torque application.
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Integrated Flange: Eliminates the need for separate washers and provides a larger contact area for more secure fastening.
Product Specifications:
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Brand: Royal Enfield Genuine Parts
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Part Number: 593021/B (Supersedes 591440/A)
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Dimensions: M10 x 1.25mm Pitch x 260mm Length
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Material: High-Tensile Forged Steel
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Head Type: Flanged Hexagonal
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Compatibility:
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✅ Royal Enfield Classic 500 (All Variants: EFI, Stealth Black, Pegasus, Gunmetal Grey)
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✅ Royal Enfield Bullet 500 UCE (Standard & Trials)
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✅ Royal Enfield Classic 350 (UCE models manufactured before 2021)
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✅ Royal Enfield Continental GT 535
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✅ Royal Enfield Himalayan 411 (Select frame/engine mount applications)
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❌ Note: Not compatible with the newer J-Series (Reborn/Meteor) or 650 Twins for engine mounting unless specified in the parts manual.
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