| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 7317006530 | Doc | 80.0% | CN | US | 2025-05-12 |
| 7317007500 | Doc | 80.0% | CN | US | 2025-05-12 |
| 8305906000 | Doc | 43.2% | CN | US | 2025-05-12 |
| 8305903010 | Doc | 30.0% | CN | US | 2025-05-12 |
| 7318152091 | Doc | 80.0% | CN | US | 2025-05-12 |
| 7318290000 | Doc | 82.8% | CN | US | 2025-05-12 |
| 8311900000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 8301600000 | Doc | 40.3% | CN | US | 2025-05-12 |
| 8301106020 | Doc | 43.6% | CN | US | 2025-05-12 |
Stainless Steel Cylindrical Pin
A stainless steel cylindrical pin is a headless fastener commonly used in a variety of mechanical applications to precisely locate, align, and join components. It is characterized by its simple cylindrical shape and is typically made from various grades of stainless steel.
Material
Stainless steel is the primary material, offering excellent corrosion resistance, strength, and durability. Common grades used include:
- 304 Stainless Steel: The most widely used grade, offering good corrosion resistance and formability. Suitable for general-purpose applications.
- 316 Stainless Steel: Contains molybdenum, providing enhanced corrosion resistance, particularly against chlorides. Ideal for marine environments or applications involving corrosive fluids.
- 410 Stainless Steel: A martensitic grade, offering higher strength and hardness but lower corrosion resistance compared to 304 and 316. Often used in applications requiring wear resistance.
Purpose
- Positioning: Accurately locate and align parts during assembly.
- Joining: Securely fasten components together, often in conjunction with other fasteners.
- Pivot Points: Function as a low-friction pivot point for rotating parts.
- Anti-Rotation: Prevent relative rotation between components.
Function
Cylindrical pins rely on a precise interference fit between the pin and the holes in the components being joined. The pin is typically press-fitted into the holes, creating a strong frictional connection. The pin’s diameter is slightly larger than the hole diameter, requiring force for installation. Shear strength is the primary force resisted by the pin.
Usage Scenarios
- Machinery: Aligning components in engines, pumps, and other mechanical systems.
- Automotive: Securing brake components, steering mechanisms, and suspension parts.
- Aerospace: Joining structural components and control surfaces.
- Electronics: Aligning connectors and securing components in electronic devices.
- Hydraulics & Pneumatics: Positioning and securing parts in cylinders and valves.
Common Types
- Solid Cylindrical Pins: The most basic type, offering maximum strength and rigidity.
- Spring Pins: Have a split end, allowing for slight compression during installation. They provide self-locking action and are easier to install and remove than solid pins.
- Dowel Pins: Used for precise alignment and positioning, often with tighter tolerances than general cylindrical pins. They are typically used in applications requiring high accuracy.
- Grooved Cylindrical Pins: Feature grooves along the length of the pin to facilitate lubrication and reduce friction.
- Shouldered Cylindrical Pins: Have a shoulder at one end, providing a defined stopping point during installation.
- Guided Cylindrical Pins: Feature a guide section to aid in alignment during installation.
Stainless steel cylindrical pins fall under several potential classifications based on their specific characteristics and application. Here's a breakdown of relevant HS codes based on the provided reference material:
-
7318152091: 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: Other: Of stainless steel. This code applies if the pin is threaded and meets the diameter requirement, and is classified as a bolt or screw.- 73: Iron or steel articles.
- 18: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles.
- 15: Threaded articles.
- 20: Other screws and bolts, whether or not with their nuts or washers.
- 91: Of stainless steel.
-
7318290000: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: Non-threaded articles: Other. This code applies if the pin is not threaded.
- 73: Iron or steel articles.
- 18: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles.
- 29: Non-threaded articles.
- 00: Other.
-
8301600000: Parts. This code could apply if the pin is being imported as a component part for another assembly.
- 83: Base metal articles.
- 01: Parts.
- 60: Other.
- 00: Other.
Regarding HS code 7318152091 and 7318290000, please note the need to verify whether the stainless steel pin is threaded or non-threaded, as this is a key determinant for correct classification. Additionally, these codes have a combined tax rate of 80.0% or 82.8% respectively, due to the 25.0%加征关税 and potential additional 25%加征关税 for steel and aluminum products.