HTS Number	Description	Unit of Quantity	General Rate of Duty	Details
8431 43	Parts for boring or sinking machinery of subheading 8430.41 or 8430.49:
8431 4340.00	Of offshore oil and natural gas drilling and production platforms	No.	Free	More
8431 4380	Other		Free
8431 4380.20	Tool joints, whether or not forged	No.	Free	More
8431 4380.40	Drill pipe fitted with tool joints	No.	Free	More
8431 4380.60	Other	No.	Free	More
8431 4380.90	Of other boring or sinking machinery	No.	Free	More
8431 49	Other:
8431 4910	Of machinery of heading 8426		Free
8431 4910.10	Of machinery of subheadings 8426.11, 8426.19 and 8426.30	No.	Free	More
8431 4910.60	Of mobile lifting frames, straddle carriers and works trucks fitted with a crane	No.	Free	More
8431 4910.90	Other	No.	Free	More
8431 4990	Other		Free
8431 4990.05	Backhoe attachments	No.	Free	More
8431 4990.10	Front-end loader attachments	No.	Free	More
8431 4990.15	Rippers and rooters	No.	Free	More
8431 4990.20	Other	No.	Free	More
8431 4990.25	Cast axle housings	No.	Free	More
8431 4990.30	Other	No.	Free	More
8431 4990.35	Cast axle housings	No.	Free	More