Silicone Watch Case O-Ring Kit
Assorted silicone O-rings for sealing watch case openings against water and dust intrusion. Under HTS 9111.90.70.00 as 'other' elastomeric case parts in multiple diameters/thicknesses. Standard diver's watch service kits.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If vulcanized rubber flat transmission belting
Certain rubber profiles classify under Chapter 40 by form, not end-use.
If general-purpose rubber gaskets/seals
Non-watch specific rubber seals fall into residual Chapter 40 provisions.
If synthetic rubber exceeding natural limits
Plastics chapter captures certain synthetic elastomer articles.
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Import Tips & Compliance
• Durometer hardness specs essential; food-grade silicone for skin safety
• Kit packaging affects set vs individual classification
Related Products under HTS 9111.90.70.00
Stainless Steel Watch Case Back
A screw-down stainless steel back cover for wristwatches, featuring engraved serial numbers and water resistance seals. Classified under HTS 9111.90.70.00 as 'other' parts of watch cases, excluding bezels, since it protects the movement and is not a complete case. Made specifically for luxury dive watches.
Titanium Watch Case Ring Spacer
A precision-machined titanium ring that spaces the movement within the watch case middle. Falls under HTS 9111.90.70.00 as an 'other' watch case part essential for case assembly and shock absorption. Used in high-end sports chronographs.
Ceramic Watch Case Bezel Insert
A high-polish ceramic insert for rotating watch bezels, with laser-etched dive scale markings. Classified in HTS 9111.90.70.00 as 'other' case parts since bezel inserts are excluded from specific bezel subheadings. Common in luxury tool watches.
Sapphire Crystal Watch Case Gasket
A silicone gasket sealing the sapphire crystal to the watch case for 300m water resistance. HTS 9111.90.70.00 applies as an 'other' case part integral to case assembly and waterproofing. Standard in professional dive watches.
Brass Watch Case Crown Tube
A threaded brass tube mounted in the watch case side for winding crown attachment and water sealing. Classified under HTS 9111.90.70.00 as 'other' watch case parts facilitating case-winder integration. Used across mechanical watch models.
Aluminum Watch Case Lug Inserts
Lightweight aluminum inserts that reinforce watch case lugs for strap attachment durability. HTS 9111.90.70.00 covers these as 'other' case parts preventing lug fractures in sports watches. Often coated for corrosion resistance.