SITCSection 7

Tool Holders and Self-Opening Dieheads

Name: Tool Holders and Self-Opening Dieheads (SITC 73511) -- U.S. Import Data
Creator: U.S. Census Bureau
License: https://www.census.gov/about/policies/open-gov/open-data.html

SITC 73511Basic heading5-digit

U.S. imports · July 2026: $94.9M; YTD $607.2M

U.S. exports · July 2026: $22.6M

Balance · July 2026: Sign in free to see the trade balance

Sign in free to see the trade balance and the full top 5 in every module.

Balance · July 2026: Loading the trade balance

U.S. imports of tool holders and self-opening dieheads (SITC 73511) totaled $94.9M in July 2026, traded with 52 countries.

Importers of Tool Holders and Self-Opening Dieheads paid $12.0M in duties in July 2026 — an effective duty rate of 14% on $86.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.

Last updated: July 2026 data

Tool holders and self-opening dieheads are precision machine-tool accessories that directly influence cutting accuracy, tool life, and cycle time on lathes, machining centers, and threading equipment. Self-opening dieheads — which retract their chasers automatically at the end of a threading pass — are especially valued in high-volume screw-machine and pipe-threading operations for their speed advantage over solid dies. The precision-fit interface between a tool holder and its machine spindle (whether HSK, CAT, BT, or other taper standards) is a key specification that buyers must match to their existing equipment.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.

6.1K shipments/mo

12-month trend

ImportsExports

Imports

$94.9MYoY · Pro

Exports

$22.6MYoY · Pro

12-mo low · imports

YoY · Pro

$94.9M$0

June 2025December 2025July 2026

Through July 2026. Source: U.S. Census Bureau.

Suppliers

Supplier Network

Are you a supplier of this product?

Get discovered by U.S. importers searching for HS 73511 — Tool Holders and Self-Opening Dieheads. Be the first supplier listed.

Balance · July 2026: Sign in free to see the trade balance

Sign in free to see the trade balance and the full top 5 in every module.

Basic heading 162 of 642 in section 7

Share of section 7 imports0.05%

Basic heading 73511 · $94.9M of $175.6B

Where it comes from, where it lands, what it pays

Imports · July 2026

Countries

origin

Taiwan and Germany together supply 52% of it.

Sign in free to see the top 5 →

Districts

customs district

Census does not publish district detail for this classification system.

States

destination

Census does not publish state detail for this classification system.

Ports

entry

Census does not publish port detail for this classification system.

Frequently Asked Questions

What is a self-opening diehead and why does it matter in high-volume threading operations?

A self-opening diehead holds multiple cutting chasers that collapse radially outward at the end of a threading stroke, allowing the workpiece to be withdrawn without reversing the spindle. This eliminates the time-consuming back-off cycle required with solid dies, making self-opening dieheads the standard choice for high-production pipe and bolt threading lines.

Does the spindle-interface standard (HSK, CAT, BT) affect the classification of an imported tool holder?

At the SITC level, all tool holders for machine tools fall under 73511 regardless of the taper or interface standard. However, at the HTS 10-digit level, distinctions by type or material may apply, so importers should verify the precise subheading with a licensed customs broker, particularly for high-value precision holders that may also be subject to Section 301 tariffs depending on origin.