ISO 4017 Hex Bolt – Full Thread Hexagon Bolts
ISO 4017 specifies full-threaded hexagon head bolts, technically equivalent to DIN 933. This international standard ensures compatibility and standardized dimensions for mechanical, automotive, and structural applications requiring full-thread fastening solutions.
What Is ISO 4017?
ISO 4017 is an international standard published by the International Organization for Standardization, specifying hexagon head bolts with full thread along the shank. The standard defines dimensions, thread specifications, and mechanical properties for full-threaded hexagon bolts used in industrial applications.
ISO 4017 is technically equivalent to DIN 933, ensuring compatibility between European (DIN) and international (ISO) standards. Both standards share identical dimensions, thread configurations, and mechanical property requirements, differing only in standard designation and regional usage preferences.
The standard is commonly referenced in international projects, procurement documents, and technical specifications where ISO standards are preferred or required for global compatibility.
Relation and Equivalence to DIN 933
ISO 4017 and DIN 933 are harmonized standards with identical technical specifications:
- •Identical Dimensions – Head width (s), head height (k), thread pitch, and length specifications are identical between both standards.
- •Same Thread Configuration – Both standards specify full thread along the entire shank length, ensuring uniform thread engagement.
- •Equivalent Mechanical Properties – Material grades and mechanical property requirements are equivalent, typically referencing ISO 898-1 for property classes.
- •International Compatibility – Both standards ensure compatibility in technical documentation, procurement, and international projects.
How Purchasing Documents Refer to Standards
Purchasing documents and technical specifications may reference these standards in various ways:
- •ISO 4017 – Common in international projects, global procurement, and ISO-preferred specifications.
- •DIN 933 – Prevalent in European markets, German engineering projects, and DIN-preferred specifications.
- •ISO 4017 / DIN 933 – Dual designation indicating equivalence, allowing suppliers to provide either standard.
- •Project-Specific Requirements – Some projects may specify one standard over the other based on regional preferences, certification requirements, or material traceability needs.
ISO 4017 vs DIN 933 Comparison
| Aspect | ISO 4017 | DIN 933 |
|---|---|---|
| Scope | International standard | European standard |
| Thread Configuration | Full thread | Full thread |
| Dimensions | Identical to DIN 933 | Identical to ISO 4017 |
| Designation Notes | ISO designation, international usage | DIN designation, European usage |
| Technical Equivalence | Technically equivalent | Technically equivalent |
Substitution Guidance
ISO 4017 and DIN 933 bolts can typically be used interchangeably due to technical equivalence. However, consider the following:
- •Project-Specific Requirements – Verify that project specifications allow substitution or specify one standard over the other. Some projects may require specific standard designation for certification or traceability purposes.
- •Material Certification – Ensure material certificates reference the appropriate standard designation if required by project specifications.
- •Regional Preferences – ISO 4017 is commonly preferred in international projects, while DIN 933 is prevalent in European markets. Consider regional preferences when specifying standards.
- •Technical Compatibility – Both standards are technically equivalent, ensuring dimensional and mechanical compatibility in applications.
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Frequently Asked Questions
What is ISO 4017?
ISO 4017 is an international standard specifying full-threaded hexagon head bolts. It is technically equivalent to DIN 933, ensuring compatibility between European (DIN) and international (ISO) standards. Both standards share identical dimensions and thread specifications.
Are ISO 4017 and DIN 933 bolts interchangeable?
ISO 4017 and DIN 933 are technically equivalent standards with identical dimensions, thread specifications, and mechanical properties. Bolts manufactured to either standard can typically be used interchangeably, subject to project-specific requirements and material certification needs.
How do purchasing documents refer to these standards?
Purchasing documents may specify ISO 4017, DIN 933, or both standards. Some documents use 'ISO 4017 / DIN 933' to indicate equivalence. Project-specific requirements may specify one standard over the other based on regional preferences or certification requirements.
What are the key differences between ISO 4017 and DIN 933?
There are no technical differences between ISO 4017 and DIN 933. Both standards specify identical dimensions, thread configurations, and mechanical properties. The difference is primarily in standard designation and regional usage: ISO 4017 is international, while DIN 933 is European.
When should I specify ISO 4017 vs DIN 933 in project requirements?
Selection depends on project requirements, regional preferences, and certification needs. ISO 4017 is commonly used in international projects, while DIN 933 is prevalent in European markets. Some projects specify both standards to indicate equivalence. Always verify project-specific requirements.
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