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Description
05901808 – Ariens / Gravely Hex Bolt (BLT, HEX 3/8"-16 × 1.25, Grade 5, ZCC, NT)
The Ariens / Gravely 05901808 is a genuine OEM 3/8"-16 hex head bolt built for dependable fastening in engine mounting and engine-related assemblies across Ariens® and Gravely® zero-turn mowers. With a 1.25-inch length and Grade 5 strength, this fastener is designed to maintain secure clamping force in high-vibration environments typical of mower engine installations.
This bolt features a ZCC (zinc corrosion-controlled) coating for improved corrosion resistance, and the NT specification indicates an OEM-defined finish/locking characteristic used in specific assemblies.
Key Details
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Part Number: 05901808
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Brand: Ariens / Gravely
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Part Type: Hex Head Bolt
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Thread Size: 3/8"-16 UNC
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Length: 1.25 in
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Strength Grade: Grade 5
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Finish / Coating: ZCC (Zinc Corrosion Controlled)
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Specifier: NT (OEM designation)
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Function: Engine and powertrain fastening hardware
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OEM Status: Genuine Ariens / Gravely replacement part
Applications & Compatibility
This bolt is specified in engine assemblies on a wide range of Ariens / Gravely mower platforms, including the following engine configurations:
Ariens Ikon® / Ikon-X® / Ikon-XL® / Ikon-XD® (Engine Applications)
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Ikon-X 42 – Engine: Kawasaki FR600
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Ikon-X 52 / Ikon-X 52 CARB – Engine: Kawasaki FR691
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Ikon XL 60 / Ikon XL 60 CARB – Engine: Kawasaki FR730
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Ikon-XD 42 – Engine: Kawasaki FR600 / FR600V
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Ikon-XD 52 – Engine: Kawasaki FR691 / FR691V
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Ikon-XD 60 – Engine: Kawasaki FR691 / FR691V
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Ikon Limited Edition – Engine: Kawasaki FR651V
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Ikon XD CE 42 / 52 – Engine: Kawasaki FR651V / FR691V (and certain Ariens 764cc variants where listed)
Ariens Edge® (Engine Applications)
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Edge 52 – Engine: Kawasaki FR651V
Ariens Ikon® / Select / Onyx / CARB (Engine Applications)
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Ikon 42 / 48 – Engine: Kawasaki FR651V
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Ikon 52 / 60 – Engine: Kawasaki FR691 / FR691V
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Ikon Onyx 52 – Engine: Kawasaki FR691 / FR691V
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Ikon Select 42 / 52 – Engine: Kawasaki FR651V / FR691
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Ikon CARB 42 / 52 – Engine: Kawasaki FR651V / FR691
Gravely Mammoth® / Ariens Apex® / Zenith® / Ridgeline® / Arrow® (Engine Applications)
This OEM bolt is also listed in engine assemblies on multiple higher-end platforms using Kawasaki FR/FX/FS series engines, including:
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Mammoth 850 (Kawasaki FX850 EFI)
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Apex 48 / 52 / 60 (Kawasaki FR series)
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Zenith 52 / 60 (Kawasaki FX730 / FX730V)
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Ridgeline and Arrow models where specified in engine assemblies
Product Highlights
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OEM 3/8"-16 × 1.25 sizing for correct engine assembly fit
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Grade 5 strength for reliable clamping under vibration
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ZCC coating helps reduce corrosion in outdoor service conditions
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Widely used across Ariens and Gravely platforms with Kawasaki FR/FX/FS engines
The 05901808 Ariens / Gravely hex bolt is a core OEM fastener for maintaining secure engine installation and long-term reliability across Ikon®, Edge®, Apex®, Zenith®, Mammoth®, and other Ariens/Gravely mower platforms.