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OEM Replacement Part – Replaces Alcoa® Part #139987 and is designed for use with compatible Alcoa wheel applications requiring a 9/16"-18 flange nut.
9/16"-18 Thread Size – Precision-machined internal threads provide secure engagement and proper fitment on designated wheel stud applications.
1-1/16" Hex Design – Features a standard 1-1/16 inch hex size for easy installation and removal using common service tools.
Grade 8 Steel Construction – Manufactured from high-strength Grade 8 steel for exceptional durability, clamping force, and resistance to heavy-duty service demands.
Phosphate & Oil Finish – Corrosion-resistant phosphate and oil coating helps protect against rust and environmental exposure while maintaining long-term performance.
