HS Codes for Oilfield Tools, Pipe Molds and Rolling Mill Parts

Getting the HS heading right decides your duty rate, your import licensing requirements, and whether your customs broker clears the shipment in a day or a week. These are the classifications most commonly applied to the four product families we export, with the logic behind them. Final classification always follows your national tariff and the specific goods — treat this as a starting point for the conversation with your broker.

Oilfield drilling tools — 8431.43

Drill collars, stabilizers, subs and kellys are parts of boring or sinking machinery, classified under 8431.43. Published customs rulings (for example in Australia’s tariff classification lists) place drill collars and oil/gas well stabilizers under 8431.43.00, which makes this one of the safer classifications in the group.

Ductile iron pipe molds — 8480.49

Metal molds for casting fall under heading 8480; molds for metal or metal carbides other than injection/compression types are 8480.49. The US Schedule B further subdivides centrifugal DI pipe molds as 8480.49.0010.

Rolling mill rolls and spares — 8455.30 / 8455.90

Heading 8455 covers metal-rolling mills and their parts. Rolls themselves — work rolls, backup rolls, sizing and straightening rolls — are 8455.30. Everything else on the stand (bearing chocks, spindles, guides, mandrel bars as mill parts) generally falls under 8455.90.

Custom forged shafts — 8483.10, sometimes 8503.00 or 7326.90

This family is where classification depends on end use:

• Transmission shafts and cranks → 8483.10
• Shafts identifiable as parts of electric motors or generators → 8503.00
• Machined steel articles not identifiable as machine parts → 7326.90

The drawing and the stated application decide it. If your shaft drives a gear train, 8483.10; if it is a motor rotor shaft, 8503.00 is usually argued.

Practical notes for importers

• Ask your supplier to state the HS code on the proforma invoice and check it against your national tariff before transfer of funds.
• Keep the classification consistent across invoice, packing list and bill of lading — mismatches trigger inspections.
• If duty rates differ meaningfully between plausible headings, request a binding ruling from your customs authority; rulings from other markets (US CROSS, EU BTI, Australian TC lists) are useful supporting evidence.

Every product page on this site lists its HS code in the specification block — see the product catalog — and our quotations state the code we declare on export documents.