Find HS Code and trade information for cover type copper screw

Copper Cover Screws

Copper cover screws are a type of screw featuring a copper coating or construction, primarily used for electrical applications and environments requiring corrosion resistance.

Material:

The core of the screw can be steel, brass, or stainless steel, with a coating of copper applied through electroplating or other methods. Some screws are manufactured entirely from copper alloys. The copper component is crucial to the screw’s functionality. Common copper alloys include:

• Pure Copper: Excellent conductivity, but softer and less durable.
• Brass (Copper-Zinc Alloy): Offers a balance of conductivity, strength, and corrosion resistance.
• Bronze (Copper-Tin Alloy): Higher strength and corrosion resistance than brass, often used in marine environments.

Purpose:

The primary purpose of copper cover screws is to provide a reliable electrical connection while minimizing corrosion. They are often used where dissimilar metals are joined, preventing galvanic corrosion.

Function:

• Electrical Conductivity: Copper is an excellent conductor of electricity, ensuring efficient current flow.
• Corrosion Resistance: Copper resists corrosion from many environmental factors, protecting the screw and connected materials.
• Preventing Galvanic Corrosion: When used with aluminum or steel, the copper acts as a sacrificial anode, protecting the base metal from corrosion.
• Secure Fastening: Provides a mechanical connection, holding components together.

Usage Scenarios:

• Electrical Panels & Boxes: Used for grounding and connecting electrical components.
• Marine Applications: Securing hardware on boats and other marine vessels where saltwater corrosion is a concern.
• Automotive Industry: Connecting electrical components and grounding systems.
• Electronics: Used in circuit boards and other electronic devices.
• Plumbing: Connecting copper pipes and fittings.
• Grounding Straps & Lugs: Ensuring a secure and corrosion-resistant ground connection.

Common Types:

• Machine Screws: Designed to be used with nuts or tapped holes. Available in various head styles (flat, round, pan, oval, etc.).
• Self-Tapping Screws: Create their own threads as they are driven into the material.
• Self-Drilling Screws: Drill their own hole and tap threads in a single operation.
• Set Screws: Used to secure an object within or against another object, often without a nut.
• Grounding Screws: Specifically designed for grounding applications, often with a pointed tip for easy penetration of surfaces.
• Pan Head Screws: Common general-purpose screw with a wide, low-profile head.
• Flat Head Screws: Designed to sit flush with the surface when installed.
• Round Head Screws: Offer a decorative appearance and are often used in applications where a low profile is desired.

Based on the provided information, “cover type copper screw” can be classified under the following HS codes:

• 7415330500: Nails, tacks, drawing pins, staples (other than those of heading 8305) and similar articles, of copper or of iron or steel with heads of copper; screws, bolts, nuts, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of copper: Other threaded articles: Screws, bolts and nuts: Screws for wood.

  • 74: Metals; this chapter covers articles made of metals.
  • 15: Copper. This heading specifically addresses articles of copper.
  • 33: Screws, bolts and nuts. This subheading further narrows down the classification to threaded articles, specifically screws, bolts, and nuts.
  • 05: Screws for wood. This provides a more specific classification for screws designed for use in wood.

• 7419801600: Other articles of copper: Other: Copper springs.

  • 74: Metals; this chapter covers articles made of metals.
  • 19: Other articles of copper. This heading covers a broader range of copper articles not specifically classified elsewhere.
  • 80: Other. This subheading indicates that the article falls into a miscellaneous category within other copper articles.
  • 16: Copper springs. This provides a more specific classification for copper springs.

• 7419800900: Other articles of copper: Other: Cloth (including endless bands), grill and netting, of copper wire; expanded metal of copper: Other.

  • 74: Metals; this chapter covers articles made of metals.
  • 19: Other articles of copper. This heading covers a broader range of copper articles not specifically classified elsewhere.
  • 80: Other. This subheading indicates that the article falls into a miscellaneous category within other copper articles.
  • 09: Cloth (including endless bands), grill and netting, of copper wire; expanded metal of copper. This provides a more specific classification for copper cloth, grill, netting, or expanded metal.

According to the provided reference material, the HS code options related to 'cover type copper screw' are limited, with only the following 3 found.

Please note that the total tax rate for HS codes 7415330500, 7419801600, and 7419800900 is 58.0%, consisting of a 3.0% base tariff and a 25.0% additional tariff, increasing to 30.0% after April 2, 2025.