Circular Trig Disc Calculator
A pocket-sized rotating disc calculator for trigonometric functions, used in surveying and construction for angle and side calculations. Classified in HTS 9017.20.4000 as a disc-type mathematical instrument. Typically printed on heavy cardstock or plastic with locking mechanism.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If static printed trigonometric tables without moving parts
Non-functional printed calculating tables classify as printed books/brochures.
If surveying-specific with geodesic scales
Specialized surveying instruments fall under heading 9015.
If child-sized with simplified/play scales
Educational toys with basic math functions classify in Chapter 95.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Label as 'mathematical instrument' not 'chart;' graphical aids risk Chapter 49 classification
• Bulk imports for construction firms need end-use statements to prevent toy misclassification
• Ensure discs rotate freely; seized/stuck units classified as printed matter
Related Products under HTS 9017.20.40.00
Hemmi 257 Bamboo Slide Rule
The Hemmi 257 is a 10-inch bamboo slide rule with Mannheim and trigonometric scales for advanced engineering calculations. It qualifies under HTS 9017.20.4000 as a traditional mathematical calculating instrument valued for precision and collectibility. Crafted from laminated bamboo with metal cursor for durability.
Log Log Duplex Trig Slide Rule
Advanced slide rule with log-log scales on both sides for exponential and trigonometric calculations in nuclear physics and rocketry. Under HTS 9017.20.4000 as a high-end mathematical instrument. Magnesium or ivory construction with multiple cursors.
Perrygraf Pocket Slide Rule
Compact 5-inch slide rule for field engineers featuring A/B/CI/D scales for basic computations. HTS 9017.20.4000 classification for portable mathematical calculators. Aluminum construction with protective cover.
Interest Rate Disc Calculator
Circular calculator computing compound interest, loan amortization, and mortgage payments from principal, rate, and term inputs. HTS 9017.20.4000 for financial mathematical disc instruments. Heavy stock paper or vinyl construction.
Scale Model Aircraft Weight & Balance Calculator
Slide rule-style calculator for RC hobbyists computing center of gravity and weight distribution for model aircraft. Under HTS 9017.20.4000 as specialized mathematical instrument. Printed on durable plastic or metal.
Concrete Volume Disc Calculator
Contractor disc calculator for computing concrete volume, rebar quantities, and slab costs from dimensions. HTS 9017.20.4000 classification for construction mathematical instruments. Rugged laminated construction.