Belleville Disc Spring
Conical disc-shaped steel spring that stacks for high load capacity, used in bolted joints and safety valves. HTS 7320.90.50 applies to these other iron or steel spring configurations.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If spring pins or simple disc springs
Certain disc types resemble threaded/spring pins in Chapter 73 fasteners.
If valve or cock appliances
Disc springs integral to valves classified as valve parts.
If non-spring stamped discs
Plain metal discs without elasticity are other steel products.
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Import Tips & Compliance
• Specify stackable design and deflection specs to affirm spring status
• Material certs for high-temp alloys (e.g
• 17-7PH) prevent metal scrap misclass
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