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Description
S04003-21 – SCAG 3/8"-16 x 2-1/2" Carriage Bolt (Round Head, Square Neck) (Genuine OEM Part)
The SCAG S04003-21 is a genuine OEM 3/8"-16 x 2-1/2-inch Carriage Bolt (Round Head, Square Neck) engineered for securely fastening structural components on SCAG commercial lawn equipment. Its smooth round head provides a clean, low-profile appearance, while the square neck locks into the mounting surface to prevent the bolt from turning during tightening, making installation fast and secure.
Manufactured from high-strength steel and built to SCAG's exact OEM specifications, the S04003-21 Carriage Bolt delivers dependable clamping force, outstanding durability, and corrosion resistance for mower decks, grass catcher assemblies, guards, brackets, and other heavy-duty mower components operating in demanding commercial environments.
Product Details
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Manufacturer Part Number: S04003-21
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Brand: SCAG
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Part Type: Carriage Bolt (Round Head Square Neck)
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Thread Size: 3/8"-16 UNC
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Length: 2-1/2 Inches
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Head Style: Round Head
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Neck Type: Square Neck
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Material: High-Strength Steel
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Finish: Corrosion-Resistant Zinc Plating
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OEM Status: Genuine SCAG OEM Part
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Installation: Direct OEM Replacement
Key Features
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Genuine SCAG OEM carriage bolt
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Square neck prevents bolt rotation during tightening
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Smooth round head provides a clean finished appearance
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High-strength steel construction for maximum durability
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Zinc-plated for corrosion resistance
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Designed for commercial mower applications
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Direct replacement with factory fit and performance
Function
The SCAG S04003-21 Carriage Bolt securely fastens mower deck components, structural brackets, guards, and grass catcher assemblies while preventing rotation during installation. Its 2-1/2-inch length provides reliable clamping force for thicker assemblies subjected to continuous vibration and heavy-duty commercial mowing.
Who Is This For?
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Commercial landscapers
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Professional lawn maintenance contractors
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SCAG mower owners
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Equipment repair technicians
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Fleet maintenance departments
Recommended Property Size
Ideal for residential estates, commercial landscaping, municipalities, golf courses, sports fields, and professional turf maintenance operations using compatible SCAG equipment.
Pros
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Genuine SCAG OEM quality
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Heavy-duty high-strength steel construction
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Square neck prevents bolt rotation
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Corrosion-resistant zinc finish
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Factory-correct fit and dimensions
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Built for long service life in commercial applications
Cons
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Designed specifically for compatible SCAG equipment
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Requires matching 3/8"-16 nut and washer for proper installation
Comparison – Genuine SCAG OEM vs Aftermarket
SCAG S04003-21 OEM
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Exact OEM dimensions and thread specifications
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Precision square neck for secure installation
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Commercial-grade steel construction
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Superior corrosion resistance
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Reliable long-term fastening performance
Aftermarket Alternatives
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Thread and neck tolerances may vary
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Lower-quality materials may reduce durability
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Less precise fitment
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Reduced corrosion protection and service life
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine SCAG OEM replacement parts trusted by professional landscapers and equipment owners.
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Genuine SCAG OEM parts
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Authorized SCAG dealer
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Fast nationwide shipping
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Competitive pricing
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Expert parts support
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Extensive OEM replacement parts inventory
