Master Bushing Insert for Offshore Rotary Table
Replaceable insert for master bushings in offshore platform rotary tables, supporting kelly/spider drive during drilling (HTS 8431.43.40.00). Hardened steel with square drive hole for 8430.41/8430.49 rigs. Wear part exclusive to offshore boring rotary systems.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If inserts for onshore rotary tables
Onshore boring machinery inserts have other 8431.43 subheadings; offshore platform rotary inserts specifically .40.
If general transmission parts
Machined inserts may resemble 8483 parts but drilling rotary-specific function keeps them in 8431.43.40.
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Import Tips & Compliance
• Specify drive square size (e.g
• 6⅛") and max torque rating; OEM interchangeability documentation; avoid classification as general bearings
Related Products under HTS 8431.43.40.00
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Offshore Drilling Riser Joint
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Subsea Wellhead Connector
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Platform Tensioner Cylinder Assembly
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Top Drive Gearbox Module
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