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139-0684 PUMP-FUEL (4DW)
$34.99
139-0684 PUMP-FUEL (4DW)
$34.99
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- 121-4318 – Toro Hex Head Shoulder Bolt (1U) (Genuine OEM Part)
Description
121-4318 – Toro Hex Head Shoulder Bolt (1U) (Genuine OEM Part)
The Toro 121-4318 Hex Head Shoulder Bolt (1U) is a genuine OEM fastener used in the cutter head and grinder head assemblies on select Toro STX-38 stump grinders. This shoulder bolt is engineered to provide precise spacing, secure retention, and controlled pivot or mounting support in high-load, high-vibration grinding applications.
Manufactured to Toro specifications, this bolt ensures proper fitment, strength, and long service life in demanding commercial stump grinding conditions.
Product Details
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Manufacturer Part Number: 121-4318
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Brand: Toro
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Part Type: Hex Head Shoulder Bolt (HSH)
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Fastener Type: Shoulder Bolt
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Application: Cutter Head / Grinder Head Assembly
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OEM Status: Genuine Toro replacement part
Function
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Secures and aligns components within the grinder head assembly
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Provides controlled spacing and pivot support
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Maintains proper cutter head alignment
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Designed to withstand high shock loads and vibration
Compatible Toro Equipment (Common Applications)
This shoulder bolt is used on select Toro stump grinders, including:
Toro STX-38 Stump Grinders
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STX-38
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STX-38 EFI with Intelli-Sweep®
(Used in cutter head and grinder head assemblies across multiple serial ranges)
⚠️ Due to model and serial-number variations, always confirm compatibility using your machine’s model and serial number before ordering.
Installation Notes
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Shoulder bolt only — washers, nuts, or spacers sold separately unless noted
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Torque to manufacturer specifications
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Inspect mating components for wear or elongation
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Replace bolt if threads are damaged or shoulder shows wear
Suggested Maintenance
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Inspect fasteners during cutter head service
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Replace if looseness, wear, or damage is detected
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Always use genuine Toro hardware for safety-critical applications
The Toro 121-4318 Hex Head Shoulder Bolt (1U) is a critical grinder head fastener that ensures safe operation, proper alignment, and long-term durability on Toro STX-38 stump grinders.
