The Phoenix USA 3/4″ x 9/16″ Lug Nut (139987) is a crucial component designed for securing Alcoa aluminum wheels while ensuring compatibility with Phoenix USA hub cover systems. This specialized lug nut features an integrated flat washer, a 3/4″ overall height, and 9/16″ inner threads, making it specifically suited for use with ND20 and ND20F series Alcoa wheels. Constructed from robust steel, this open-end lug nut provides a reliable and secure connection for your wheels and hub covers. Its design takes into account the specific requirements of aluminum wheels and hub cover installations, offering a precise fit and proper functionality.
KEY FEATURES AND BENEFITS:
- Integrated Washer: The attached flat washer helps distribute clamping force evenly across the wheel surface. This prevents damage to the aluminum wheel and ensures a secure and consistent hold. It is also designed to interface correctly with Phoenix USA hub cover systems.
- Precise Dimensions: The 3/4″ overall height is engineered for optimal compatibility with Phoenix USA hub covers, ensuring they sit correctly and are securely held in place.
- Correct Thread Size: Featuring 9/16″ inner threads (likely with a 1.5 or 18 TPI pitch), this lug nut is designed to match the wheel studs on compatible Alcoa aluminum wheels, providing a safe and reliable fastening point.
- Durable Construction: Made from steel, these lug nuts are built to withstand the stresses of wheel mounting and long-term use, offering strength and reliability.
- Open End Design: The open-end design can accommodate longer wheel studs if necessary, providing flexibility in various wheel and axle configurations.
- Compatibility: Specifically designed for use with ND20 and ND20F series Alcoa aluminum wheels, ensuring proper fitment and function within these wheel systems.
- Hub Cover Integration: Engineered to work seamlessly with Phoenix USA hub cover systems, contributing to the overall aesthetic and protection of the wheel assembly.
SPECIFICATIONS:
- Part Number: 139987
- Manufacturer: Phoenix USA, Inc.
- Type: Washered Lug Nut
- Intended Use: Hub Cover Parts, Wheel Mounting
- Compatible Wheel Brands: Alcoa Aluminum Wheels
- Compatible Wheel Series: ND20, ND20F (likely)
- Inner Thread Size: 9/16″ (Pitch likely 1.5 or 18 TPI – confirm based on your vehicle/wheel specifications)
- Overall Height: 3/4″ (0.75 inches)
- Hex Size: 1 1/16″ (1.0625 inches)
- Material: Steel (possibly black anodized)
- Washer Type: Integrated Flat Washer
- Design: Open End
HOW TO USE:
- Ensure Compatibility: Verify that the Phoenix USA 139987 lug nut has the correct thread size (9/16″ and the appropriate pitch) for your vehicle’s wheel studs and is intended for your specific Alcoa aluminum wheel model (ND20 or ND20F series).
- Position the Wheel: Carefully place the Alcoa aluminum wheel onto the wheel studs, ensuring it sits flush against the hub.
- Install the Lug Nuts: By hand, thread each Phoenix USA 139987 lug nut onto the wheel studs. Start by tightening them in a star pattern (crisscross) to ensure even pressure distribution.
- Initial Tightening: Using a lug wrench or socket wrench with a 1 1/16″ socket, tighten each lug nut to approximately half of the recommended torque specification in the star pattern.
- Final Torque: Using a calibrated torque wrench, tighten each lug nut to the vehicle or wheel manufacturer’s recommended torque specification (typically found in the owner’s manual or wheel documentation). Continue the star pattern to ensure even tightening.
- Hub Cover Installation (if applicable): If you are installing Phoenix USA hub covers, follow the manufacturer’s instructions for attaching them, ensuring the lug nuts are properly seated and the hub cover fits securely.
- Re-Torque (if recommended): Some manufacturers recommend re-torquing the lug nuts after a short period of driving (e.g., 50-100 miles) to ensure they remain properly tightened.
BENEFITS OF USING PHOENIX USA 3/4″ X 9/16″ LUG NUT (139987):
- Secure Wheel Attachment: Provides a reliable and strong connection between the wheel and the vehicle hub, ensuring safe operation.
- Proper Hub Cover Fitment: The specific 3/4″ height is designed to work in conjunction with Phoenix USA hub covers, allowing for correct installation and a finished appearance.
- Protection for Aluminum Wheels: The integrated washer helps prevent direct contact between the steel lug nut and the softer aluminum wheel surface, reducing the risk of scratching or damage.
- Even Load Distribution: The washer assists in distributing the clamping force evenly, contributing to proper wheel seating and reducing the potential for stud fatigue.
- Designed for Compatibility: Being specifically made for certain Alcoa wheel models (ND20, ND20F) and Phoenix USA hub covers ensures optimal performance and fit.
- Durable and Reliable: The steel construction offers strength and longevity, withstanding the demands of regular use.
FEATURES:
- Attached Oval-Shaped Washer: Facilitates even pressure distribution and protects the wheel surface during tightening.
- 3/4 Inch Height: Precisely engineered to accommodate Phoenix USA hub cover mounting requirements.
- 9/16 Inch Inner Threading: Matches the stud size of compatible Alcoa aluminum wheels for a secure fit.
- 1 1/16 Inch Hex Head: Standard size for easy installation and removal using common tools.
- Open End Configuration: Allows for use with extended length wheel studs if needed.
- Steel Material: Provides the necessary strength and resilience for wheel securement.
- Intended for Specific Alcoa Wheel Models: Ensures correct fit and function with ND20 and ND20F series wheels.









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