Other
Thermionic, cold cathode or photo-cathode valves and tubes (for example, vacuum or vapour or gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray tubes, television camera tubes). > Parts: > Other > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8540.99
Broadcast Transmitter Klystron RF Structure
This is a radio frequency (RF) interaction structure designed for high-power klystron microwave tubes used in broadcast transmitters. It is a critical component that enables the amplification of RF signals to multi-megawatt levels, and it falls under tariff item 8540.99.10 as an RF interaction structure for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.10CRT Television Electron Gun Assembly
This electron gun assembly is a key component of cathode-ray tube (CRT) televisions, generating and accelerating electron beams to strike the phosphor screen for image display. It falls under tariff item 8540.99.10 as an electron gun, which is a part of thermionic valves and tubes.
8540.99.10High-Voltage Television Camera Tube Electron Gun
This is an electron gun designed for television camera tubes (vidicons), used to accelerate electrons for image sensing in broadcast and industrial cameras. It falls under tariff item 8540.99.10 as an electron gun, a part of thermionic valves and tubes.
8540.99.10Industrial X-Ray Tube Electron Gun
This electron gun is a component for industrial X-ray tubes, generating electron beams for non-destructive testing applications. It falls under tariff item 8540.99.10 as an electron gun, a part of thermionic valves and tubes, provided the X-ray tube is classified under heading 85.40.
8540.99.10Klystron Tube Electron Gun
This precision electron gun is designed for klystron microwave tubes used in particle accelerators and broadcasting transmitters. It falls under tariff item 8540.99.10 as an electron gun, a part of thermionic valves and tubes, specifically for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.10Microwave Magnetron Electron Gun
This electron gun is designed for magnetron microwave tubes used in radar and cooking appliances, emitting electrons into the RF interaction space. It falls under tariff item 8540.99.10 as an electron gun for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.10Oscilloscope Cathode-Ray Tube Electron Gun
This is an electron gun designed for use in high-speed oscilloscope cathode-ray tubes (CRTs). It provides precise beam deflection for accurate waveform display in test and measurement equipment. As a part of a thermionic tube, it is classified under tariff item 8540.99.10, which covers electron guns for such tubes.
8540.99.10Radar Magnetron RF Interaction Helix
This helix structure is designed for RF interaction in radar magnetron tubes, facilitating microwave generation for military and aviation radar systems. It falls under tariff item 8540.99.10 as an RF interaction structure for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.10Satellite TWT Amplifier Electron Gun
This specialized electron gun is for traveling wave tube amplifiers used in satellite transponders, with a radiation-tolerant design for space environments. It falls under tariff item 8540.99.10 as an electron gun for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.10Traveling Wave Tube (TWT) RF Interaction Structure
This RF interaction structure, specifically a helix assembly, is for traveling wave tubes used in satellite communications and high-frequency amplifiers. It falls under tariff item 8540.99.10 as an RF interaction structure for microwave tubes of subheadings 8540.71, 8540.72, or 8540.79.
8540.99.90CRT Deflection Yoke Holder
This holder is used for mounting deflection yokes on CRT necks, aligning magnetic fields for electron beam scanning. It is a part of a cathode-ray tube, but it is not an electron gun or an RF interaction structure. Therefore, it falls under this tariff item as 'other' parts.
8540.99.90CRT Internal Magnetic Shielding
This mu-metal internal shielding sheet is placed between the CRT electron gun and deflection area to prevent external magnetic interference. It is a part of a cathode-ray tube, but it is not an electron gun or an RF interaction structure. Thus, it is classified under this tariff item as 'other' parts.
8540.99.90CRT Neck Extender Sleeve
This precision glass or ceramic sleeve extends the CRT neck for custom electron gun positioning in specialized applications, such as medical and scientific CRTs. It is a part of a cathode-ray tube, but it is not an electron gun or an RF interaction structure. Therefore, it falls under this tariff item as 'other' parts.
8540.99.90CRT Purity Glass Sample Disc
This small glass disc with phosphor coating is used during CRT manufacturing to check glass purity and contamination levels. It is a part of a cathode-ray tube, but it is not an electron gun or an RF interaction structure. Thus, it is classified under this tariff item as 'other' parts.
8540.99.90CRT Socket with Pin Contacts
This ceramic base socket with 19-pin gold-plated contacts is used for CRT neck board connections, providing filament and grid power. It is a part of a cathode-ray tube, but it is not an electron gun or an RF interaction structure. Therefore, it falls under this tariff item as 'other' parts.
8540.99.90CRT Spacer Band Tooling
CRT spacer band tooling consists of specialized bands used during the manufacturing of cathode-ray tubes to maintain precise glass-to-glass spacing before frit sealing. These reusable tools are essential for high-volume tube production and are classified as parts of cathode-ray tubes under tariff item 8540.99.90.
8540.99.90Electron Gun Subassembly for TV CRT
Electron gun subassemblies for television cathode-ray tubes include cathodes, grids, and focusing electrodes that form and direct the electron beam. These modular assemblies are essential for beam formation and are classified as parts of cathode-ray tubes under tariff item 8540.99.90.
8540.99.90Focus Electrode Assembly
Focus electrode assemblies are multi-element electrostatic stacks used in CRT electron guns to precisely shape the beam spot size for sharp images. These precision parts are classified under tariff item 8540.99.90 as other parts of cathode-ray tubes, commonly used in professional graphics monitors.
8540.99.90Gettering Ring Assembly for CRT
Gettering ring assemblies for CRTs contain barium that activates during tube sealing to absorb residual gases, maintaining vacuum integrity. These essential parts extend tube life and are classified under tariff item 8540.99.90 as other parts of cathode-ray tubes.
8540.99.90High-Voltage CRT Bleeder Resistor
High-voltage CRT bleeder resistors are specialized 10MΩ resistors mounted internally in CRTs to safely discharge the high-voltage anode after power-off. These integral safety parts prevent electrical shock during service and are classified under tariff item 8540.99.90 as other CRT parts.
8540.99.90Monochrome CRT Anode Cap Assembly
Monochrome CRT anode cap assemblies include a high-voltage anode cap with resistor and spring contact, used in oscilloscopes and instruments. These assemblies handle high-voltage connections and prevent arcing, classified under tariff item 8540.99.90 as other CRT parts.
8540.99.90Phosphor Coated CRT Implosion Band
Phosphor coated CRT implosion bands are steel bands with a phosphor coating applied for edge lighting, providing structural integrity against implosion while contributing to screen glow. These parts combine mechanical and phosphor functions and are classified under tariff item 8540.99.90.
8540.99.90Shadow Mask Frame for Color CRT
Shadow mask frames for color CRTs are precision metal frames that hold the shadow mask, ensuring accurate color phosphor excitation by electron beams. These frames are classified under tariff item 8540.99.90 as other parts of cathode-ray tubes not specified elsewhere.
8540.99.90Sony Trinitron CRT Neck Assembly
Sony Trinitron CRT neck assemblies contain the electron gun structure that generates and directs electron beams onto the phosphor screen to create images. These assemblies are classified under tariff item 8540.99.90 as parts of cathode-ray tubes.
8540.99.90Static Convergence Magnet Assembly
Static convergence magnet assemblies are rare-earth magnet assemblies mounted permanently inside CRTs for static electron beam convergence adjustment. These integral image correction parts are factory-set during tube production and classified under tariff item 8540.99.90.