Find HS Code and trade information for mounting ring

Mounting Ring

A mounting ring is a fastener, generally circular, used to secure an object – typically a lens, filter, camera, or other optical or mechanical component – to a supporting structure. They facilitate attachment, alignment, and sometimes adjustment of the secured item.

Material:

Mounting rings are constructed from a variety of materials depending on the application's requirements for rigidity, weight, precision, and environmental factors. Common materials include:

• Aluminum: Lightweight and cost-effective, often used in amateur astronomy and photography.
• Stainless Steel: Offers high strength, corrosion resistance, and is suitable for demanding environments.
• Brass: Provides good machinability and corrosion resistance, frequently found in older or precision instruments.
• Carbon Fiber: Extremely lightweight and rigid, used in high-performance applications where weight is critical.
• Plastic/Polymer: Used for low-precision applications or where electrical isolation is needed.

Purpose:

• Secure Attachment: The primary function is to hold components firmly in place.
• Precise Alignment: Rings often incorporate features for accurate positioning and centering.
• Adjustability: Some rings allow for fine adjustments in tilt, rotation, or focus.
• Compatibility: Standardized ring sizes and thread patterns ensure interchangeability between components from different manufacturers.

Function:

Mounting rings operate by clamping force. They typically consist of a ring with internal threads that mate with external threads on the component being mounted. Tightening the ring compresses the component against a supporting surface, creating a secure connection. Some designs use multiple screws or locking mechanisms for increased stability.

Usage Scenarios:

• Astronomy: Securing telescopes, lenses, and cameras to telescope tubes or mounting plates.
• Photography: Attaching filters to lenses, connecting lenses to camera bodies, or mounting cameras to tripods.
• Microscopy: Holding microscope objectives in place.
• Optics: Positioning and securing optical elements in laser systems or scientific instruments.
• Industrial Applications: Mounting sensors, cameras, or other devices in machinery.

Common Types:

• Threaded Rings: The most common type, relying on threads for attachment. These are often available in standard sizes (e.g., 48mm, 58mm, 77mm for filters).
• Dovetail Rings: Feature a dovetail groove for sliding attachment, common in astronomy for attaching telescopes to equatorial mounts.
• Compression Rings: Use a clamping force to secure components without threads, often used for delicate optics.
• Split Rings: Consist of two halves that clamp around a component, allowing for easy installation and removal.
• Adjustable Rings: Incorporate screws or other mechanisms for fine adjustments in position or angle.
• Camera Lens Adapters: Specialized rings that allow lenses designed for one camera system to be used on another. These often include additional optics to correct for differences in flange distance and image circle.

Mounting rings can fall under several classifications depending on the material and specific application. Here are relevant HS codes based on the provided reference material:

• 8302416015: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, blinds, coachwork, saddlery, trunks, chests, caskets or the like; base metal hat racks, hat-pegs, brackets and similar fixtures; castors with mountings of base metal; automatic door closers of base metal; and base metal parts thereof: Other mountings, fittings and similar articles, and parts thereof: Suitable for buildings: Of iron or steel, of aluminum or of zinc Suitable for interior and exterior doors (except garage, overhead or sliding doors): Doorstops, chain door fasteners, door pulls, kick plates, door knockers and escutcheons.
  • Chapter 83: Metal mountings, fittings and similar articles.
  • Heading 8302: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, etc.
  • Subheading 8302.41: Other mountings, fittings and similar articles.
  • Subheading 8302.41.60: Suitable for buildings.
  • Subheading 8302.41.60.15: Of iron or steel, of aluminum or of zinc suitable for interior and exterior doors.
• 8302416080: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, blinds, coachwork, saddlery, trunks, chests, caskets or the like; base metal hat racks, hat-pegs, brackets and similar fixtures; castors with mountings of base metal; automatic door closers of base metal; and base metal parts thereof: Other mountings, fittings and similar articles, and parts thereof: Suitable for buildings: Other: Of iron or steel, of aluminum or of zinc Other.
  • Chapter 83: Metal mountings, fittings and similar articles.
  • Heading 8302: Base metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, etc.
  • Subheading 8302.41: Other mountings, fittings and similar articles.
  • Subheading 8302.41.60: Suitable for buildings.
  • Subheading 8302.41.60.80: Other of iron or steel, of aluminum or of zinc.
• 7326908688: Other articles of iron or steel: Other: Other: Other: Other Other.
  • Chapter 73: Other articles of iron or steel.
  • Heading 7326: Other articles of iron or steel.
  • Subheading 7326.90: Other.
  • Subheading 7326.90.86: Other.
  • Subheading 7326.90.86.88: Other.

Important Note: Regarding HS codes 8302416015 and 8302416080, please note that the reference material specifies a 25%加征关税 on steel and aluminum products. Also, HS code 7326908688 has a 25%加征关税 on steel and aluminum products.