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Description
05901819 – Ariens / Gravely Hex Bolt (BLT, HEX 7/16"-20 × 3.00, Grade 8, ZCC, NT)
The Ariens / Gravely 05901819 is a genuine OEM Grade 8 hex head bolt engineered specifically for electric PTO clutch mounting and engine-to-clutch assemblies on Ariens® and Gravely® zero-turn mowers. With a 7/16"-20 fine thread and 3.00-inch length, this fastener delivers the high clamping force and strength required in high-torque, high-vibration clutch applications.
The Grade 8 hardened construction combined with a ZCC (zinc corrosion-controlled) finish ensures long service life and resistance to loosening or corrosion under demanding operating conditions. The NT designation indicates an OEM-specified configuration used in factory clutch installations.
Key Details
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Part Number: 05901819
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Brand: Ariens / Gravely
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Part Type: Hex Head Bolt
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Thread Size: 7/16"-20 UNF (fine thread)
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Length: 3.00 in
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Strength Grade: Grade 8 (high strength)
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Finish / Coating: ZCC (zinc corrosion controlled)
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Specifier: NT (OEM designation)
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Primary Function: Electric PTO clutch mounting bolt
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OEM Status: Genuine Ariens / Gravely replacement part
Applications & Compatibility
This bolt is extensively used in PTO clutch assemblies across a wide range of Ariens Apex® platforms, including standard, CARB, CE, SD, RD, and Limited Edition models.
Ariens Apex® Series – PTO Clutch
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Apex 48 / 52 / 60
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Apex CARB 48 / 52 / 60
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Apex CE 48 / 52
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Apex SD & RD CE (48" / 52")
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Apex 60 Limited
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Apex Kawasaki FR691 / FR730 / FR691V / FR730V equipped models
Additional Applications
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Apex 48 / 52 / 60 across multiple serial ranges where the parts list specifies Clutch – Apex
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Ridgeline 48 & 52 models using Kawasaki FS651V engines (engine-related clutch mounting hardware)
Product Highlights
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Grade 8 strength for critical PTO clutch retention
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Fine-thread 7/16"-20 design for increased holding power
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OEM 3.00" length for correct clutch stack-up and alignment
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ZCC coating helps resist corrosion in outdoor mower environments
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Factory-specified fastener for Ariens and Gravely clutch systems
SEO-ready short description (for product cards)
05901819 Ariens / Gravely Hex Bolt – Genuine OEM 7/16"-20 × 3.00" Grade 8 hex head bolt with ZCC corrosion-resistant finish, designed for electric PTO clutch mounting on Ariens Apex zero-turn mowers and related platforms.
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