Find HS Code and trade information for hex head screw

Hex Head Screw

A hex head screw (also known as a hexagonal head screw, cap screw, or bolt) is a threaded fastener with a six-sided (hexagonal) head. It is a very common choice for fastening materials together.

Material:

• Steel: The most common material, often with coatings like zinc, black oxide, or hot-dip galvanization for corrosion resistance. Alloy steels (e.g., Grade 5, Grade 8) offer increased strength.
• Stainless Steel: Provides excellent corrosion resistance, suitable for outdoor or wet environments. Common grades include 304 and 316.
• Aluminum: Lightweight and corrosion-resistant, but generally lower in strength than steel.
• Brass: Corrosion-resistant and often used in decorative applications or where spark resistance is needed.
• Other Alloys: Specialized alloys may be used for high-temperature, high-strength, or specific chemical resistance applications.

Purpose:

The primary purpose of a hex head screw is to securely join two or more materials together. They are designed to be tightened with a wrench or socket, applying clamping force to hold the materials in place.

Function:

• Clamping Force: The screw’s threads convert rotational force into linear force, drawing the materials together.
• Shear Resistance: The screw shaft resists forces attempting to shear the joint apart.
• Tensile Strength: The screw resists forces attempting to pull the joint apart.

Usage Scenarios:

• Construction: Framing, roofing, and general building applications.
• Automotive: Engine components, chassis assembly, and bodywork.
• Machinery: Assembly of mechanical components, equipment mounting.
• Furniture: Joining wood or metal components.
• Electronics: Securing components in housings.
• General Assembly: A wide range of applications requiring a strong, reliable fastener.

Common Types:

• Fully Threaded Hex Head Screws: Threads extend the entire length of the screw. Often used with nuts or threaded holes.
• Partially Threaded Hex Head Screws (Cap Screws): Threads are only on a portion of the screw shaft, typically near the head. Designed for use in tapped holes.
• Grade 5 Hex Head Screws: A common carbon steel grade offering good strength for general applications.
• Grade 8 Hex Head Screws: Higher strength carbon steel, used for more demanding applications.
• Socket Head Cap Screws (SHCS): Similar to cap screws but with a cylindrical head and an internal hexagonal drive. Offer a lower profile and can be tightened with an Allen wrench.
• Flange Hex Head Screws: Feature a flange under the head to distribute the clamping force over a wider area, reducing stress on the materials.
• Hex Head Lag Screws: Large diameter screws with coarse threads, used for heavy-duty wood construction.

Based on the provided information, the following HS codes may be relevant to “hex head screw”:

• 7318152061: 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: Other: With hexagonal heads: Of stainless steel. This code specifically covers hex head screws made of stainless steel, with a shank or thread diameter of 6mm or more.

• 7318152065: 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: Other: With hexagonal heads: Other. This code covers hex head screws made of iron or steel (excluding stainless steel), with a shank or thread diameter of 6mm or more.

Explanation of HS Code Structure (based on provided information):

• 73: Chapter 73 covers articles of iron or steel.
• 18: Heading 7318 specifically covers screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers, and similar articles.
• 15: Subheading 731815 covers threaded articles, specifically screws and bolts.
• 20: Further specifies the type of screws and bolts.
• 61/65: Differentiates based on material (stainless steel vs. other) and head type (hexagonal).

Important Note:

According to the provided reference material, both HS codes 7318152061 and 7318152065 have a combined tariff rate of 80.0%, comprised of a 0.0% base tariff and a 25.0% additional tariff, with a further 25% additional tariff applied to steel and aluminum products. Please verify the material composition of the hex head screws to determine the correct HS code and applicable tariff.