Find HS Code and trade information for thread repair tool

Thread Repair Tool

A thread repair tool is used to restore damaged threads in fasteners or tapped holes. Damage can occur due to corrosion, excessive torque, or improper installation. These tools offer a robust solution, often stronger than the original thread.

Materials

• Steel: Most common material for both inserts and tools, offering high strength and durability. Alloys like stainless steel are used for corrosion resistance.
• Aluminum: Used for repairing aluminum components, providing compatibility and preventing galvanic corrosion.
• Titanium: Employed in aerospace and high-performance applications where weight reduction and exceptional strength are critical.

Purpose

The primary purpose is to reinstate a functional thread when the original is stripped, broken, or worn. This avoids the need for complete component replacement, saving time and cost. They are used in a wide variety of applications where a strong, reliable fastener is essential.

Function

Thread repair tools work by creating a new, stronger thread within the damaged hole. This is typically achieved by:

1. Preparing the Damaged Hole: The existing damaged threads are removed, and the hole is cleaned and tapered to accept the repair insert. This often involves using a tap to create a specific angle.
2. Installing the Insert: A specialized insert, typically helically wound or diamond-shaped, is screwed into the prepared hole. The insert creates a new thread profile.
3. Fastening: The original fastener (or a new one) is then screwed into the repair insert, creating a secure connection.

Usage Scenarios

• Automotive: Repairing spark plug threads, cylinder head bolts, and other engine components.
• Aerospace: Critical applications requiring high-strength, reliable fasteners.
• Machinery: Repairing threads in industrial equipment, engines, and pumps.
• Construction: Repairing bolts and screws in structural components.
• General Maintenance: Restoring damaged threads in a wide range of applications.

Common Types

• Helical Inserts (e.g., Heli-Coil): The most widely used type. These are coiled metal springs that create a continuous internal thread. They are known for their high strength and versatility.
• Self-Tapping Inserts (e.g., Time-Sert): These inserts have a cutting edge that taps its own threads as they are installed. They are suitable for softer materials.
• Tangless Inserts: Similar to helical inserts, but without the installation tang, simplifying the installation process.
• Diamond Inserts: These inserts have a diamond-shaped cross-section and are often used in softer materials, providing a strong grip.
• Threaded Bushings: Used for heavier duty repairs or when a larger diameter thread is required.

Based on the provided information, the following HS codes may be relevant to “thread repair tool”:

• 8205100000: Handtools (including glass cutters) not elsewhere specified or included; blow torches and similar self-contained torches; vises, clamps and the like, other than accessories for and parts of machine tools or water-jet cutting machines; anvils; portable forges; hand- or pedal-operated grinding wheels with frameworks; base metal parts thereof: Drilling, threading or tapping tools, and parts thereof.

  • Chapter 82: Tools, implements, cutlery, hand tools, and articles of corresponding materials; articles of cutlery not elsewhere specified or included; articles of base metal having blades, cutting edges, or serrated edges.
  • Heading 8205: Handtools (including glass cutters) not elsewhere specified or included; blow torches and similar self-contained torches; vises, clamps and the like, other than accessories for and parts of machine tools or water-jet cutting machines; anvils; portable forges; hand- or pedal-operated grinding wheels with frameworks; base metal parts thereof.
  • Subheading 820510: Drilling, threading or tapping tools, and parts thereof. This covers hand tools specifically used for creating or repairing threads.

• 8207406000: Interchangeable tools for handtools, whether or not power operated, or for machine-tools (for example, for pressing, stamping, punching, tapping, threading, drilling, boring, broaching, milling, turning or screwdriving), including dies for drawing or extruding metal, and rock drilling or earth boring tools; base metal parts thereof: Tools for tapping or threading, and parts thereof: Other.

  • Chapter 82: Tools, implements, cutlery, hand tools, and articles of corresponding materials; articles of cutlery not elsewhere specified or included; articles of base metal having blades, cutting edges, or serrated edges.
  • Heading 8207: Interchangeable tools for handtools, whether or not power operated, or for machine-tools.
  • Subheading 820740: Tools for tapping or threading, and parts thereof. This specifically covers interchangeable tools used for tapping or threading operations.

• 8207906000: Interchangeable tools for handtools, whether or not power operated, or for machine-tools (for example, for pressing, stamping, punching, tapping, threading, drilling, boring, broaching, milling, turning or screwdriving), including dies for drawing or extruding metal, and rock drilling or earth boring tools; base metal parts thereof: Other interchangeable tools, and parts thereof: Other: Other: Not suitable for cutting metal, and parts thereof: For handtools, and parts thereof.

  • Chapter 82: Tools, implements, cutlery, hand tools, and articles of corresponding materials; articles of cutlery not elsewhere specified or included; articles of base metal having blades, cutting edges, or serrated edges.
  • Heading 8207: Interchangeable tools for handtools, whether or not power operated, or for machine-tools.
  • Subheading 820790: Other interchangeable tools, and parts thereof. This covers interchangeable tools that are not specifically for tapping or threading, and are not suitable for cutting metal.

Regarding HS code 8207406000 and 8207906000, the applicable tax rate is: basic tariff 4.8%, additional tariff 25.0%, and additional tariff 30.0% after 2025.4.2.