Of other boring or sinking machinery
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 > Of other boring or sinking machinery
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 8431.43.80.90
Spider Valve Assembly for Pipe Racks
Mousehole spider valves controlling pipe rack access during tripping on drilling rigs. Boring machinery parts under 8431.43.80.90.
Crown Block Sheave for Drawworks
High-capacity sheaves for crown blocks in drawworks systems handling heavy loads during sinking. Fits 8431.43.80.90 parts definition.
Traveling Block Hook Load Cell
Strain gauge load cells integrated in traveling block hooks for real-time weight monitoring during sinking. Principal use parts HTS 8431.43.80.90.
Mud Pump Piston Assembly for Drilling Rigs
High-pressure piston assemblies for mud circulating pumps on boring rigs, essential for removing cuttings during sinking. Classified under 8431.43.80.90 for parts of 8430.41/8430.49 machinery.
Drill Pipe Stabilizer for Well Sinking
Hardfaced steel stabilizers mounted on drill strings to center tools during borehole sinking in oilfield operations. Fits HTS 8431.43.80.90 as parts of other boring/sinking machinery per statistical notes.
Casing Pipe for Oil Well Drilling Rig
Steel casing pipes used in oil well drilling rigs to line boreholes and prevent collapse during sinking operations. Classified under HTS 8431.43.80.90 as parts for other boring or sinking machinery of heading 8430.41/8430.49, specifically for stabilizing wells in petroleum exploration.
Rotary Drilling Kelly Bar
Forged steel kelly bars that transmit torque from rotary table to drill bit in oil/gas well sinking rigs. HTS 8431.43.80.90 covers these as essential parts for other boring machinery under 8430.41/8430.49.
Borehole Swivel for Rotary Sinking Rigs
Heavy-duty swivels connecting kelly to mud hose on rotary drilling rigs, allowing rotation during well sinking. HTS 8431.43.80.90 as parts for other boring machinery.
Wellhead Blowout Preventer Control Parts
Ram control actuators and manifolds for BOP stacks on sinking rigs, preventing well blowouts during drilling. Specific to 8431.43.80.90 for other boring machinery parts.
Drill String Slip Assembly
Wedge-type slips for gripping drill pipe during tripping operations on boring rigs. HTS 8431.43.80.90 for parts of sinking machinery 8430.41/8430.49.
Master Bushing Adapter for Rotary Table
Steel adapters fitting between rotary table and kelly bushing for torque transmission in sinking operations. Principal parts under HTS 8431.43.80.90.
Top Drive Disconnect Assembly
Hydraulic disconnects for top drive systems enabling pipe handling during well sinking. Classified 8431.43.80.90 for other boring machinery components.
Elevator Link Pin Assemblies
High-strength alloy steel pins connecting elevator links for drill pipe handling on sinking rigs. HTS 8431.43.80.90 parts classification.
Safety Clamp Bowl for Drill Pipe
Backup safety clamps preventing dropped objects during pipe handling in borehole sinking. Specific to 8431.43.80.90 boring parts.
Torque Wrench Backup Tong
Manual/power backup tongs providing reaction torque during drill pipe make/break operations. HTS 8431.43.80.90 classification for sinking rig parts.