HS Code for Drilling Rig Parts
The HS Code for drilling rig parts is 843143. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 843143 |
|---|---|
| US HTS (10-digit) | 8431430000 |
| EU CN Code (8-digit) | 84314300 |
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 1.7% |
| Chapter | 84 |
| Heading | 8431 |
| Last Updated | 2026-05 |
Description
Parts for boring or sinking machinery
HS Code 843143 includes parts for boring or sinking machinery of subheading 8430.41 or 8430.49, with a US MFN duty rate of Free.
Frequently Asked Questions
How does the base material (e.g., steel vs. carbide) of a drilling rig part affect its HTS classification under 8431.43?
The base material is generally not the primary determinant for classification under HTS 8431.43, as this heading is for parts of boring machinery based on their function. However, specific composite parts or inserts (e.g., drill bits with working parts of cemented carbide) may be separately classified elsewhere, such as under 8207 for interchangeable tools. You must examine the part's complete composition and primary function to ensure correct classification.
What are the specific customs risks for importing parts for boring or sinking machinery under HTS 843143?
Parts under HTS 843143 are high-risk for customs inspections due to dual-use concerns; components like advanced drill bits or hydraulic systems may require export control licenses if they can be used in oil/gas exploration in sanctioned regions. Improperly documented commercial invoices that lack a detailed, technical description of each part's specific function will almost certainly trigger a hold and request for additional information.
What are the typical additional costs, beyond the product price, when importing parts for drilling rigs under HTS 843143?
Importers of these heavy machinery parts typically incur a Free Most-Favored-Nation (MFN) duty rate, subject to Section 301 tariffs for goods of Chinese origin. Additional mandatory fees include the 0.3464% Merchandise Processing Fee (MPF) and Harbor Maintenance Fee (HMF) at 0.125% of value for vessel shipments. Substantial costs also arise from heavy lift charges, specialized rigging for oversized pieces, and potential customs bonds for entries valued over $2,500.
Material Impact on Classification of Drilling Rig Parts
The base material of a part can shift its classification from HTS 8431.43. For example, parts made from unmachined steel forgings or castings are classifiable in Chapter 72 or 73, not here. Rubber or composite seals, packers, or gaskets for drilling rigs typically fall under 4016.93 or 3916.90, not as machinery parts. Similarly, electrical control panels or wiring harnesses integral to the rig are classified in Chapter 85. The classification under 8431.43 is generally reserved for finished, functional metal components of the rig's mechanical systems.
Alternative & Commonly Confused HTS Codes
Drilling rig parts are often confused with parts for other machinery, which fall under different headings. Key alternatives include HTS 8431.49 for parts of other boring or sinking machinery, and 8474.90 for parts of machines for sorting earth, stone, or minerals. Components with a general industrial application, like certain pumps or valves, may be classifiable elsewhere, such as in heading 8413. It is critical to confirm the part's exclusive or principal use for a drilling rig to justify classification under 8431.43.
Related HS Codes
Ready to source Drilling Rig Parts?
Compare prices from verified suppliers on Alibaba.
View Verified SuppliersAffiliate link — we may earn a commission at no extra cost to you.
Related Tools
Get tariff change alerts
We'll email you when duty rates change for products you care about. No spam.