Terms of Service

Welcome to ThreadChart. By accessing or using our website at threadchart.net, you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, please do not use ThreadChart.

1. Acceptance of Terms

By using ThreadChart, you acknowledge that you have read, understood, and agree to these Terms, as well as our Privacy Policy. These Terms apply to all visitors, users, and others who access the website.

2. Description of Service

ThreadChart is a free online reference database providing technical specifications for threads and fasteners, including:

• Thread dimensions for ISO metric, UNC, UNF, NPT, and BSP standards
• Reference tools (drill & tap charts, torque specifications, bolt grades, cross-references)
• Educational content about thread standards and fasteners

ThreadChart is provided "as-is" for informational and educational purposes only.

3. Use of ThreadChart

3.1 Permitted Use

You may use ThreadChart for:

• Personal reference: Looking up thread specifications for personal projects
• Professional reference: Using data in engineering, machining, or manufacturing work
• Education: Learning about thread standards and fastener specifications
• Research: Studying thread standards and mechanical engineering topics

3.2 Prohibited Use

You may NOT:

• Scrape, crawl, or automatically extract data from ThreadChart for commercial redistribution
• Republish ThreadChart content on other websites without attribution
• Use ThreadChart data to create competing commercial products or services
• Attempt to hack, disrupt, or interfere with the website's functionality
• Use ThreadChart in any way that violates applicable laws or regulations
• Remove copyright notices, trademarks, or attribution from the website

3.3 Attribution for Content Reuse

If you reference ThreadChart data in publications, documentation, or other materials, please provide attribution:

"Thread specifications from ThreadChart (threadchart.net)"

4. Disclaimer of Warranties

ThreadChart is provided "AS IS" and "AS AVAILABLE" without warranties of any kind, either express or implied, including but not limited to:

• Implied warranties of merchantability
• Fitness for a particular purpose
• Non-infringement
• Accuracy, completeness, or reliability of data
• Uninterrupted or error-free operation

For critical applications: Always verify specifications against official standards documentation (ISO 68-1, ASME B1.1, ASME B1.20.1, ISO 228, ISO 7, etc.) before use in production, safety-critical, or liability-sensitive applications.

5. Limitation of Liability

To the fullest extent permitted by law, ThreadChart and its operators shall not be liable for any:

• Direct damages: Loss of revenue, profits, data, or business opportunities
• Indirect damages: Consequential, incidental, punitive, or special damages
• Property damage: Damage to equipment, tooling, or manufactured parts
• Injury or harm: Personal injury, death, or any other harm resulting from use of ThreadChart data
• Errors or omissions: Inaccuracies, mistakes, or missing information in specifications

This limitation applies even if ThreadChart has been advised of the possibility of such damages. Some jurisdictions do not allow the exclusion of certain warranties or limitation of liability, so the above limitations may not apply to you.

Maximum liability: In no event shall ThreadChart's total liability exceed the amount you paid to access the service (which is $0, as the service is free).

6. User Responsibilities

By using ThreadChart, you agree to:

• Verify data: Independently verify all specifications before use in critical applications
• Use proper judgment: Apply appropriate engineering judgment and safety factors
• Follow standards: Consult official standards documentation for production work
• Assume risk: Accept full responsibility for consequences of using ThreadChart data
• Comply with laws: Use ThreadChart in compliance with all applicable laws and regulations

7. Intellectual Property

7.1 Thread Specifications

Thread dimensions and formulas are based on publicly available international standards (ISO, ASME, ANSI). ThreadChart does not claim ownership of these specifications.

7.2 Website Content

The ThreadChart website, including design, text, graphics, code, and user interface, is owned by ThreadChart and protected by copyright law. You may not copy, modify, or distribute website elements without permission.

7.3 Trademarks

"ThreadChart" and associated logos are trademarks of ThreadChart. You may not use these marks without prior written consent.

8. Third-Party Links and Services

ThreadChart may contain links to third-party websites or services (e.g., ISO, ASME). These links are provided for convenience only. We do not endorse or assume responsibility for third-party content, policies, or practices.

9. Modifications to Service

We reserve the right to:

• Modify, suspend, or discontinue ThreadChart (or any part) at any time without notice
• Update thread specifications, add or remove standards, or change tools
• Change pricing (though ThreadChart is currently free)
• Restrict access to certain features or users

We are not liable for any modification, suspension, or discontinuation of the service.

10. Changes to Terms

We may update these Terms from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of ThreadChart after changes constitutes acceptance of the revised Terms.

For significant changes, we may provide additional notice (e.g., email notification to registered users, if applicable).

11. Termination

We may terminate or suspend your access to ThreadChart immediately, without prior notice or liability, for any reason, including:

• Violation of these Terms
• Prohibited use (scraping, hacking, etc.)
• Fraudulent or illegal activity
• At our sole discretion

Upon termination, your right to use ThreadChart ceases immediately.

12. Indemnification

You agree to indemnify, defend, and hold harmless ThreadChart and its operators from any claims, damages, losses, liabilities, and expenses (including legal fees) arising from:

• Your use of ThreadChart
• Your violation of these Terms
• Your violation of any third-party rights
• Any content you submit or transmit through ThreadChart

13. Governing Law

These Terms are governed by and construed in accordance with the laws of the jurisdiction in which ThreadChart operates, without regard to conflict of law principles.

Any disputes arising from these Terms or your use of ThreadChart shall be resolved in the courts of that jurisdiction.

14. Severability

If any provision of these Terms is found to be unenforceable or invalid, that provision shall be limited or eliminated to the minimum extent necessary, and the remaining provisions shall remain in full force and effect.

15. Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between you and ThreadChart regarding the use of the website.

16. Contact Information

If you have questions about these Terms, please contact us: