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Description
06505000 – Slotted Hex Nut 1/2-13 (Genuine OEM Ariens / Gravely Part)
The 06505000 slotted hex nut (1/2-13 UNC) is a genuine OEM Ariens / Gravely fastener engineered for use in steering and deck lift linkage applications across a wide range of zero-turn mower platforms.
This nut features a standard hex profile with castellated (slotted) design, allowing it to be secured with a cotter pin when installed on drilled bolts or shafts. This design provides positive mechanical locking, preventing loosening under vibration and repeated deck height adjustments. The coarse 1/2-13 thread offers strength and durability in high-load pivot and linkage points.
Manufactured to Ariens and Gravely factory specifications, the 06505000 nut ensures correct fit, thread engagement, and long service life in demanding residential and commercial mowing environments.
Key Details
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Manufacturer Part Number: 06505000
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Part Name: Nut – Slotted Hex
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Brand: Ariens / Gravely
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Thread Size: 1/2-13 UNC (coarse thread)
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Style: Slotted / castellated hex nut
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Finish: OEM protective coating
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Part Type: OEM fastening hardware
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Function: Secures linkage and deck lift components with cotter pin retention
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Installation: Direct OEM replacement
Function & Applications
The 06505000 1/2-13 slotted hex nut is primarily used in pivoting and adjustable assemblies where positive locking is required, including:
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Deck lift arms and height adjustment linkages
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Steering and drag link assemblies
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Chassis-mounted linkage points
When paired with a cotter pin, the slotted design ensures the nut cannot rotate loose, even under constant vibration or repeated adjustments.
Compatibility
This OEM Ariens / Gravely nut is used extensively across Compact-Pro and ZT HD mower platforms, including but not limited to:
Compact-Pro Models
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Compact-Pro 34
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Compact-Pro 44
(Drag Link assemblies)
ZT HD Models
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ZT HD 44
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ZT HD 48
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ZT HD 52
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ZT HD 60
(Standard and CARB variants)
Common Assemblies
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Deck Lift – Left Hand (LH)
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Deck Lift – Right Hand (RH)
Used across multiple serial number ranges, including early, mid, and late production models.
Why Use Genuine OEM 06505000
Using the OEM 06505000 slotted hex nut ensures:
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Correct 1/2-13 thread fitment
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Positive locking with cotter pin retention
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Safe, secure deck height adjustment
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Reduced risk of loosening or component wear
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Compatibility with factory hardware and torque specifications
This nut delivers OEM-level strength, safety, and reliability, making it the correct replacement choice for Ariens and Gravely steering and deck lift assemblies.

