Other
Parts suitable for use solely or principally with the machinery of headings 84.25 to 84.30. > Of machinery of heading 84.28: > Other > Other
Duty Rate (from China)
Products classified under Tariff item 8431.39.00.90
Belt Conveyor Idler Frame
>- An adjustable steel frame assembly holding troughing idlers that support and shape the conveyor belt. It is a part of belt conveyor machinery under heading 8428, providing the structural support needed for material transport. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Blowout Preventer Accumulator Rack
A mounting rack designed to hold hydraulic accumulators in blowout preventer (BOP) stacks used on oil and gas wells. It ensures emergency pressure is available for well control operations. As a dedicated part for BOP machinery classified under heading 84.28, it falls under tariff item 8431.39.00.
8431.39.00Boule Handling Robot End-Effector
>- A vacuum or gripper end-effector customized for handling heavy semiconductor crystal boules between processing stations. It is designed solely or principally for use with wafer manufacturing equipment of heading 8428, such as automated handling systems. As a part of such machinery, it falls under tariff item 8431.39.00.
8431.39.00Chain Conveyor Sprocket
>- A hardened steel sprocket engaging conveyor chains to drive pallets or heavy loads. It is a principal part for chain conveyor systems classified under heading 8428, providing the drive mechanism for material transport. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Christmas Tree Valve Actuator
A hydraulic actuator used to operate gate valves on oil and gas wellhead Christmas trees. It controls the flow from production wells by opening and closing valves. As a dedicated part for wellhead machinery under heading 84.28, it is classified under 8431.39.00.
8431.39.00Conveyor Roller Bearing Assembly
>- A heavy-duty bearing unit integrated into conveyor rollers for smooth material transport in industrial belt or roller conveyors. It is a part principally used with conveyor machinery of heading 8428, providing the rotational support needed for roller movement. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Crown Block Sheave Assembly
A multi-groove sheave assembly designed for the crown block at the top of an oil rig derrick. It guides wireline for hoisting operations during drilling. As a dedicated part for hoisting machinery under heading 84.28, it falls under 8431.39.00.
8431.39.00Crystal Boule Grinder
A precision grinder used to shape semiconductor crystal boules to exact wafer diameters and grind flats to indicate conductivity type. It is a part of wafer preparation equipment classified under heading 84.28, and is therefore suitable for use solely or principally with that machinery.
8431.39.00Crystal Growth Crucible Holder
A high-purity graphite or quartz holder that positions the crucible precisely in Czochralski furnaces for silicon pulling. It is an essential part of crystal grower machines under heading 84.28, and is classified as 'other' parts under 8431.39.00.
8431.39.00Crystal Ingot Alignment Fixture
>- A precision fixture that aligns semiconductor crystal ingots before grinding or slicing operations. It is designed solely for wafer preparation machinery of heading 8428, ensuring accurate positioning for subsequent processing. This part is classified under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Czochralski Crystal Puller Furnace
A high-temperature furnace used in the Czochralski method to grow monocrystalline silicon boules for semiconductor wafers. It is a part of crystal grower equipment classified under heading 84.28 for other machinery of a kind used in semiconductor material processing.
8431.39.00Diamond Slurry Distribution Manifold
>- A manifold system that evenly distributes diamond slurry across wafer lapping or polishing platens in semiconductor preparation equipment. It is a specific part for heading 8428 machinery, ensuring consistent slurry flow for uniform material removal. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Drawworks Brake Drum
A heavy-duty brake drum used in the drawworks hoisting system of oil and gas drilling rigs. It controls the movement of the drill string during operations, providing high-torque stopping in extreme environments. As a dedicated part for drawworks machinery under heading 84.28, it is classified under 8431.39.00.
8431.39.00Drilling Jar Sub
A threaded sub-connector for hydraulic or mechanical drilling jars used to free stuck pipe in oil well boreholes. It delivers jarring impact to release the pipe. As a dedicated part for drilling jar machinery under heading 84.28, it falls under 8431.39.00.
8431.39.00Drill Pipe Slip Insert
Hardened steel inserts for drill pipe slips used in rotary tables of oil rigs. They grip the pipe during drilling operations and are tipped with tungsten carbide for wear resistance. As dedicated parts for rotary table machinery under heading 84.28, they are classified under 8431.39.00.
8431.39.00Elevator Buffer Mounting Bracket
>- A base bracket securing hydraulic or spring oil buffers to the pit floor for emergency stopping. It is a safety mounting part for elevators of heading 8428, ensuring the buffers are firmly anchored. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Elevator Car Operating Panel
>- A pushbutton control panel mounted inside an elevator car for floor selection and door operation. It is an electronic-mechanical part principally for elevator cars of heading 8428, providing the user interface for elevator control. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Elevator Counterweight Roller Guide
A precision roller assembly guiding counterweight frames along rails to balance elevator car loads. It is a specific part for counterweight systems in elevators of heading 84.28, and is classified under 8431.39.00.
8431.39.00Elevator Door Interlock Switch
A safety switch preventing elevator operation unless hoistway doors are securely closed. It is a critical safety part for elevator door systems of heading 84.28, and is classified under 8431.39.00.
8431.39.00Elevator Guide Rail Bracket
A machined steel bracket that secures T-shaped guide rails to elevator shafts, ensuring stable car movement. It is specifically classified under 8431.39.00 as a part for elevator machinery of heading 84.28.
8431.39.00Elevator Rope Clamp
A wedge-type clamp securing hoist ropes to elevator cars and counterweights. It is a load-rated safety component for traction elevators, classified under 8431.39.00.
8431.39.00Elevator Safety Gear Assembly
A progressive safety gear that grips guide rails to stop elevator cars during overspeed conditions. It is a principal part for passenger elevators classified under 8431.39.00.
8431.39.00Elevator Traction Sheave
A grooved pulley used in elevator traction systems to grip and move hoist ropes, transmitting power from the motor to the elevator car. It is classified under 8431.39.00 as a part solely for elevator machinery of heading 84.28.
8431.39.00Flexible Screw Conveyor Tube
A UHMWPE-lined steel tube housing a rotating screw for flexible directional conveying. It is a principal enclosure part for screw conveyors of heading 84.28, classified under 8431.39.00.
8431.39.00Float Zone Crystal Grower
Apparatus employing the float zone method to produce ultra-pure monocrystalline semiconductor boules by melting and recrystallizing silicon rods. It is classified as machinery of heading 84.28 for semiconductor material processing, and its parts fall under 8431.39.00.
8431.39.00Frac Pump Fluid End
A high-pressure fluid end assembly for hydraulic fracturing pumps used in oil and gas well stimulation. It handles proppant slurries at extreme pressures. As a dedicated part for fracturing pump machinery under heading 84.28, it falls under 8431.39.00.
8431.39.00Kelly Drive Bushing
A wear-resistant bushing for the kelly drive system in rotary oil drilling rigs. It transmits torque from the turntable to the drill pipe and is made from hardened steel for harsh downhole conditions. As a dedicated part for kelly drive machinery under heading 84.28, it is classified under 8431.39.00.
8431.39.00Mud Pump Piston Assembly
A replacement piston assembly designed specifically for mud pumps used in oil and gas drilling rigs under heading 84.28. It handles high-pressure abrasive drilling fluids to circulate mud during borehole excavation. As a dedicated part for mud pump machinery, it falls under 8431.39.00.
8431.39.00Oilfield Cementing Head
A cementing head manifold used for pumping cement plugs into oil and gas well casings during completion. It releases darts and plugs for zonal isolation. As a dedicated part for cementing machinery under heading 84.28, it is classified under 8431.39.00.
8431.39.00Pneumatic Conveyor Diverter Valve
A flap-type valve diverting dilute phase pneumatic conveying streams between multiple destinations. It is a part principally for pneumatic conveyor systems of heading 84.28, classified under 8431.39.00.
8431.39.00RF Coil Assembly for Float Zone Puller
>- A radio frequency induction coil assembly that creates the molten zone in float zone crystal growth systems. It is a specific part for heading 8428 semiconductor machinery, providing the precise heating required for crystal purification. This part is classified under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Seed Crystal Rotation Mechanism
>- A motorized mechanism that rotates the seed crystal at precise speeds during Czochralski pulling to ensure uniform boule diameter. It is a critical part for heading 8428 crystal growers, providing the controlled rotation needed for crystal growth. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Semiconductor Wafer Slicing Diamond Saw
A diamond wire or blade saw designed to slice ultra-thin wafers from monocrystalline semiconductor boules without damage. It is essential wafer preparation machinery of heading 84.28, and its parts are classified as 'other' under 8431.39.00.
8431.39.00Single-Side Wafer Polisher Head
>- A carrier head assembly that holds and polishes one side of semiconductor wafers to a mirror finish for device fabrication. It is a part of wafer polishing equipment in heading 8428, providing the precise pressure and motion needed for planarization. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Spiral Conveyor Flight Section
Helical steel flight sections bolted together to form continuous spirals for vertical product conveying. They are classified under 8431.39.00 as parts of spiral conveyor machinery in heading 84.28.
8431.39.00Vibratory Conveyor Trough
A wear-resistant steel trough that vibrates to convey bulk materials like powders or granules. It is a specific part for vibratory feeders classified under 8431.39.00.
8431.39.00Wafer Bow Measurement Fixture
>- A fixture that holds wafers during bow and warp measurement in grinding process control stations. It is designed for wafer grinder or polisher equipment of heading 8428, ensuring accurate dimensional inspection. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Wafer Edge Profiling Tool
>- Tooling for grinding precise edge profiles on semiconductor wafers to prevent chipping during handling. It is a part of wafer grinding equipment under heading 8428, providing the shaped abrasive surface needed for edge profiling. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Wafer Lapping Machine Platen
>- A cast iron or composite platen for lapping semiconductor wafers to precise flatness before polishing. It is a part of wafer grinder, lapper, or polisher under heading 8428 for semiconductor processing, providing the flat surface needed for material removal. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.
8431.39.00Wafer Thickness Control Gauge Mount
>- A mounting fixture that positions in-process thickness gauges on wafer grinders for real-time feedback control. It is a part of semiconductor wafer preparation machinery of heading 8428, ensuring accurate gauge placement for quality control. This part falls under tariff item 8431.39.00 as an 'other' part of such machinery.