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Description
11990109 – Flange Platform Bolt, 1/2"-13 x 1-3/4" (Genuine OEM Replacement Part)
The 11990109 Flange Platform Bolt is a genuine OEM replacement fastener designed to securely mount platform, frame, and structural components on compatible commercial lawn mowers and outdoor power equipment. Featuring a 1/2"-13 thread and 1-3/4-inch length, this heavy-duty flange bolt provides exceptional clamping force while the integrated flange distributes load evenly, eliminating the need for a separate washer in many applications.
Manufactured from high-strength, heat-treated steel with a corrosion-resistant finish, the 11990109 Flange Bolt is built to withstand vibration, heavy loads, and harsh outdoor environments. Its OEM design ensures proper fit, secure fastening, and long-lasting durability in demanding commercial mowing applications.
Product Details
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Part Number: 11990109
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Part Type: Flange Platform Bolt
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Bolt Size: 1/2"-13
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Length: 1-3/4 Inches
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Head Style: Hex Flange
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OEM Quality: Genuine OEM replacement part
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Material: Heat-treated high-strength steel
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Finish: Corrosion-resistant coating
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Installation: Direct OEM replacement
Key Features
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Genuine OEM replacement fastener
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1/2"-13 coarse thread
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1-3/4" overall bolt length
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Integrated flange provides superior load distribution
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Heavy-duty heat-treated steel construction
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Excellent resistance to vibration and loosening
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Corrosion-resistant finish for extended service life
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Direct OEM replacement
Function
The 11990109 Flange Platform Bolt secures structural and platform components while maintaining proper alignment and clamping force. The integrated flange increases the bearing surface, reducing stress on the mounting surface and helping prevent loosening caused by vibration during equipment operation.
Replacing damaged or worn fasteners helps maintain structural integrity and ensures safe, reliable equipment performance.
Compatibility
The 11990109 Flange Platform Bolt is compatible with select commercial lawn mowers and outdoor power equipment requiring OEM part number 11990109.
Always verify your equipment's model number, serial number, and illustrated parts diagram before ordering to ensure proper fitment.
Who Is This For?
Ideal for:
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Professional landscapers
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Commercial lawn maintenance companies
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Equipment repair technicians
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Municipal maintenance departments
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Golf course maintenance crews
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Fleet maintenance professionals
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Property management companies
Common Applications
The 11990109 Flange Bolt is commonly used for securing:
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Operator platforms
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Frame assemblies
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Deck mounting components
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Structural brackets
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Protective guards
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Chassis components
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Heavy-duty equipment assemblies
Pros
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Genuine OEM replacement quality
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High-strength heat-treated steel
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Integrated flange eliminates the need for a separate washer in many applications
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Excellent resistance to vibration
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Corrosion-resistant finish
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Precision-machined threads for secure fastening
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Built for demanding commercial use
Cons
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Compatible only with equipment requiring OEM part number 11990109
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Should always be tightened to the manufacturer's recommended torque specification
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Replace if threads become damaged or excessive corrosion is present
Comparison – Genuine OEM vs Aftermarket Flange Bolts
Genuine OEM 11990109
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Exact OEM dimensions and thread specifications
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Heat-treated commercial-grade steel
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Precision-machined threads
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Superior corrosion protection
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Factory-quality fit and durability
Generic Aftermarket Bolt
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Thread tolerances may vary
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Material strength may differ
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Coating quality varies by manufacturer
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Reduced resistance to vibration and corrosion
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Service life depends on manufacturing quality
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine OEM replacement parts trusted by professional landscapers, commercial contractors, and equipment service technicians.
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Genuine OEM replacement parts
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Fast shipping throughout the USA
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Competitive pricing
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Expert customer support
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Trusted source for commercial mower hardware and replacement components
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Extensive inventory of OEM fasteners, structural parts, and outdoor power equipment components
Maintain the strength and reliability of your equipment with the 11990109 Flange Platform Bolt, 1/2"-13 x 1-3/4". Engineered to OEM specifications, this heavy-duty flange bolt delivers secure fastening, superior vibration resistance, and long-lasting durability for commercial lawn mowers and outdoor power equipment.


