Find HS Code and trade information for wheel lug ,bolts studs (bulge acorn)

Wheel Lug, Bolts, and Studs (Bulge Acorn)

Wheel lugs, bolts, and studs are essential components in a vehicle’s wheel fastening system, securing the wheels to the vehicle’s hubs. They are critical for vehicle safety and performance. The term often encompasses all three, though distinctions exist. The "(bulge acorn)" specification refers to a particular style of lug nut.

Materials

These components are typically manufactured from:

• Steel: The most common material, offering high strength and durability at a reasonable cost. Often alloyed with various elements to improve properties. Grades vary significantly (e.g., Grade 5, Grade 8) indicating tensile strength.
• Aluminum Alloys: Used in performance and aftermarket applications, reducing weight. Aluminum lugs require specific torque specifications and are often paired with aluminum wheels.
• Titanium Alloys: Provide the highest strength-to-weight ratio, used in high-performance racing and specialized applications. Expensive.

Purpose

The primary purpose of these components is to:

• Secure the Wheel: Maintain a strong connection between the wheel and the vehicle's hub, preventing wheel detachment during operation.
• Distribute Load: Evenly distribute the vehicle’s weight and driving forces across the wheel mounting surface.
• Provide Centering: Often contribute to wheel centering, ensuring the wheel is properly aligned on the hub.

Function

• Bolts: Wheel bolts are threaded along their entire length. They pass through the wheel and are tightened with a nut on the opposite side. The hub has threaded holes.
• Studs: Wheel studs are threaded on one end and press-fit into threaded holes in the hub. Nuts are then threaded onto the exposed threaded portion to secure the wheel. The wheel has holes to accept the studs.
• Lugs (Nuts): Wheel lugs are nuts that thread onto the studs to clamp the wheel against the hub. They are the component tightened to secure the wheel.

Usage Scenarios

• Passenger Vehicles: Steel bolts and studs are standard.
• Performance/Racing: Aluminum or titanium bolts and studs are used to reduce weight and improve strength.
• Heavy-Duty Vehicles: Higher-grade steel bolts and studs with larger diameters are used to handle increased loads.
• Off-Road Vehicles: Extended studs and specialized lug nuts are often used for increased durability and compatibility with aftermarket wheels.

Common Types

• Conical Seat Lug Nuts: The most common type, featuring a 60-degree conical shape that matches a corresponding taper in the wheel.
• Ball Seat Lug Nuts: Feature a rounded ball shape for seating. Used with wheels designed for this type.
• Flat Seat Lug Nuts: Feature a flat seating surface. Less common, requiring precise wheel and lug nut matching.
• Spline Drive Lug Nuts: Use an internal spline pattern for increased torque transfer and security. Common in performance applications.
• Extended Lug Studs: Longer studs used with wheel spacers or thicker wheels.
• Bulge Acorn Lug Nuts: These lug nuts feature a distinctive bulge or rounded shape at the end, designed to accommodate aftermarket wheels with tighter hole tolerances or to improve cosmetic appearance. They provide a more secure seating surface and reduce the risk of wheel damage.

Considerations

• Torque Specifications: Proper torque is critical. Over-tightening can damage studs or wheels, while under-tightening can lead to wheel detachment.
• Thread Engagement: Sufficient thread engagement is essential for adequate clamping force.
• Compatibility: Ensure compatibility between lug nuts, studs, and wheels (seat type, thread size, etc.).
• Regular Inspection: Regularly inspect lug nuts and studs for damage or wear.
• Corrosion Protection: Apply anti-seize lubricant to prevent corrosion and facilitate removal.

Wheel lug bolts and studs (bulge acorn) fall under the category of fasteners used in vehicle assembly. Based on the provided reference material, the following HS codes are relevant:

• 7318152010: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: Threaded articles: Other screws and bolts, whether or not with their nuts or washers: Bolts and bolts and their nuts or washers entered or exported in the same shipment Having shanks or threads with a diameter of less than 6 mm. This code covers iron or steel bolts and bolts with nuts/washers (if shipped together) with a diameter under 6mm.
• 7318152020: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: Threaded articles: Other screws and bolts, whether or not with their nuts or washers: Bolts and bolts and their nuts or washers entered or exported in the same shipment Having shanks or threads with a diameter of 6 mm or more: Track bolts. This code applies to iron or steel bolts and bolts with nuts/washers (if shipped together) with a diameter of 6mm or greater, specifically including track bolts.

Tax Rate Details (applicable to both HS codes):

• Basic Tariff: 0.0%
• Additional Tariff: 25.0%
• Post-April 2, 2025 Additional Tariff: 30.0%
• Additional Tariff for Steel/Aluminum Products: 25%
• Total Tariff: 80.0%

Important Considerations:

• The total tariff is 80.0% for both HS codes.
• If the wheel lug bolts/studs are shipped with their corresponding nuts and washers in the same shipment, these HS codes apply.
• The diameter of the shank or thread is crucial for determining the correct HS code. If less than 6mm, use 7318152010; if 6mm or greater, use 7318152020.
• Both HS codes are subject to an additional tariff of 25% for steel/aluminum products.