Other
Parts suitable for use solely or principally with the machinery of headings 8425 to 8430: > Of machinery of heading 8426, 8429 or 8430: > Parts for boring or sinking machinery of subheading 8430.41 or 8430.49: > Other
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]
Subheadings
Products classified under HTS 8431.43.80
Swamp Barge Stabilizer Pontoons
Steel pontoon assemblies for stabilizing 8430.41 drilling barges in marshland boring operations. Provides flotation for sinking rigs. Under 8431.43.80.
Casing Hammer Cylinder
Hydraulic cylinder for down-the-hole casing hammers used with 8430.49 pile driving/sinking rigs. Drives steel casing into ground. 8431.43.80 part.
Pile Driving Lead Guide
Adjustable steel guide channels for pile leads on 8430.41 boring/sinking rigs. Aligns hammer and pile during vertical driving. Fits 8431.43.80.
Rotary Drill Bit for Oil Well Drilling
Tungsten carbide-tipped rotary drill bit designed specifically for use with boring machinery in oil and gas drilling rigs under HTS 8430.41. It features polycrystalline diamond cutters for penetrating hard rock formations during deep well boring. Classified under 8431.43.80 as a part for boring or sinking machinery of subheading 8430.41.
Diamond Impregnated Core Drill Bit
Core drill bit impregnated with industrial diamonds for extracting core samples from geological formations using sinking machinery of 8430.49. Essential for mineral exploration drilling rigs. Falls under 8431.43.80 as a specialized part for boring or sinking equipment.
Tricone Roller Drill Bit
Three-cone roller bit with tungsten carbide inserts for rotary drilling in oilfield boring operations under 8430.41 machinery. Provides crushing and shearing action for various rock types. Classified in 8431.43.80 as parts of boring/sinking rigs.
Drill String Stabilizer
Cylindrical stabilizer with hardened alloy body to centralize drill string in boreholes of 8430.41 boring machinery. Prevents deviation and vibration during oil/gas drilling. Part of 8431.43.80 for boring/sinking equipment parts.
PDC Drill Bit Cutter Blocks
Polycrystalline diamond compact (PDC) cutter blocks for insertion into drill bits of 8430.49 sinking machinery. Provide shear cutting for soft to medium formations in mining ops. Under 8431.43.80 as boring parts.
Borehole Reamer Blades
Replaceable carbide blades for borehole reamers used in enlarging holes with 8430.41 drilling rigs. Essential for casing installation in oil wells. Classified 8431.43.80 as sinking machinery parts.
Water Swivel for Drill String
High-pressure water swivel connecting drill hose to rotating string in 8430.49 sinking rigs. Allows mud/fluid injection while permitting rotation. Part under 8431.43.80 for boring equipment.
Kelly Drive Bushing
Square kelly drive bushing connecting kelly bar to rotary table in 8430.41 oil rigs. Transmits torque for borehole drilling. Fits 8431.43.80 as boring machinery part.
Mud Pump Piston Cups
Rubber-lined piston cups for high-pressure mud pumps on 8430.41 drilling rigs. Circulates drilling fluid during boring operations. Classified 8431.43.80 as sinking parts.
Drill Pipe Wiper Rubber
Rubber wiper seals for cleaning drill pipe as it’s pulled from boreholes in 8430.49 rigs. Prevents contamination in sinking operations. Under 8431.43.80 parts.
Rotary Table Slip Inserts
Hardened steel slip inserts for gripping drill pipe in rotary tables of 8430.41 boring rigs. Provides secure torque transmission. Part of 8431.43.80.
Bail Anchor for Drilling
Forged steel bail anchor for securing hoisting bail on 8430.49 sinking derricks. Supports drill string handling during boring. 8431.43.80 classification.