Of articles of subheading 9031.80.40
Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof: > Parts and accessories: > Other: > Of articles of subheading 9031.80.40
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9031.90.70.00
Optical Comparator Worktable Clamp Set
Precision machined clamps and holders for securing workpieces on the stage of optical comparators (9031.80.40). These allow stable positioning for accurate profile and dimension projection measurements. Classified under 9031.90.70.00 as accessories principally used with these specific inspection projectors.
Shadowgraph Screen Calibration Reticle
Precision etched glass reticle mounted on the projection screen of shadowgraphs (profile projectors under 9031.80.40) for scale calibration and accuracy verification. Essential for maintaining measurement traceability in metrology labs. Classified as a part under HTS 9031.90.70.00.
Profile Projector Protractor Screen Attachment
Angular measurement protractor overlay that attaches to profile projector screens for direct angle readings from magnified projections. Specifically engineered for 9031.80.40 shadowgraph screens. Falls under HTS 9031.90.70.00 as a dedicated accessory.
Comparator Stage Precision Leveling Screws
Micrometer-adjustable leveling screws for optical comparator workstages, providing sub-micron height adjustments for perfect part alignment. Exclusive to 9031.80.40 profile projectors. Classified under 9031.90.70.00 machine parts.
Profile Projector Dust Cover and Storage Case
Custom-fitted protective cover and transit case designed specifically for profile projectors of 9031.80.40, with foam cutouts for optics and stage protection. Prevents contamination of precision optical surfaces. Classifies as accessory under HTS 9031.90.70.00.
Shadowgraph Objective Lens Cleaning Kit
Specialized cleaning kit with lint-free wipes, precision swabs, and optical cleaning solution formulated for shadowgraph objective lenses in 9031.80.40 profile projectors. Prevents scratches on high-magnification optics. Dedicated accessory under 9031.90.70.00.
Profile Projector USB Data Output Cable
Custom-length USB interface cable with proprietary connectors for digital profile projectors (9031.80.40) to connect with PC-based measurement software. Enables digital dimension export and SPC data collection. Classifies as dedicated accessory under 9031.90.70.00.
Optical Comparator Edge Detection Chart
Test chart with precision edges and patterns for verifying edge detection accuracy and resolution on optical comparators classified under 9031.80.40. Used for ISO calibration verification. Dedicated test accessory under HTS 9031.90.70.00.
Profile Projector Vertical Travel Adapter
Adapter bracket enabling extended vertical travel range on profile projector workstages for measuring taller components. Bolts directly to 9031.80.40 stage mechanisms. Precision accessory under HTS 9031.90.70.00.
Shadowgraph Magnification Verification Kit
Complete calibration kit with stage graticules, screen rulers, and verification templates for confirming magnification accuracy across all lenses of shadowgraphs (9031.80.40). Essential for gage R&R studies. Under HTS 9031.90.70.00.
Profile Projector Quick-Change Lens Mount
Rapid lens exchange mechanism for profile projectors allowing instant switching between magnification objectives without recalibration. Precision dovetail mounting for 9031.80.40 instruments. Dedicated part under HTS 9031.90.70.00.
Profile Projector Stage Micrometer
A precision glass slide with etched scale lines used to calibrate the magnification of profile projectors classified under 9031.80.40. It mounts on the projector's stage for accurate measurement verification during optical inspections. This accessory falls under HTS 9031.90.70.00 as a dedicated part for those specific measuring instruments.
Profile Projector Overlay Template Holder
Adjustable holder for transparent overlay templates used in profile projectors to compare projected part outlines against master templates. Ensures precise alignment during quality control inspections. Falls under 9031.90.70.00 as a dedicated accessory for 9031.80.40 instruments.
Optical Comparator LED Illumination Filter Kit
Set of precision optical filters for LED illumination systems in optical comparators (9031.80.40), providing green, yellow, and contour lighting options for optimal edge definition. Designed exclusively for these profile projection machines. Classifies under 9031.90.70.00 parts.