Overview
ISO 14587:2011 sets forth standardized requirements for hexalobular socket raised countersunk (oval) head tapping screws, focusing on their characteristics and dimensional tolerances. The standard applies to screws with thread sizes from ST2,9 to ST6,3, ensuring compatibility, performance, and safety in various fastening applications. Developed by ISO Technical Committee 2, Subcommittee SC 10, this standard harmonizes international expectations for manufacturers, suppliers, and end-users, promoting consistency and reliability in fastener quality.
Key Topics
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Screw Characteristics
ISO 14587:2011 details the geometry, dimensions, and tolerances for hexalobular socket raised countersunk (oval) head tapping screws. The specifications include head shape, thread sizes, and driving features, following the hexalobular (commonly known as “Torx”) internal drive profile for enhanced resistance to cam-out and improved torque transmission.
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Material and Mechanical Properties
The specified screws are manufactured from steel meeting the requirements of ISO 2702, ensuring the mechanical strength and durability required for tapping screws.
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Thread Standards
Threads conform to ISO 1478, supporting effective self-tapping performance across designated materials.
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Coatings and Finishes
Electroplated coatings adhere to ISO 4042, while non-electrolytically applied zinc flake coatings are covered under ISO 10683, offering corrosion protection tailored to specific environments.
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Tolerance and Inspection
Tolerances are governed by ISO 4759-1 for grades A, B, and C. Acceptance inspection follows the procedures of ISO 3269, reinforcing product quality at every stage.
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Designation System
The standard prescribes a uniform method for screw designation, supporting efficient procurement and specification.
Applications
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Industrial Assembly
Hexalobular socket raised countersunk (oval) head tapping screws are widely used in the assembly of sheet metal, enclosures, and electronic devices where secure, flush-mounted fastening is essential.
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Automotive Sector
These screws provide high tamper resistance and consistent performance in automotive interiors, body panels, and component mounts.
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Consumer Electronics
Their unique head shape allows for aesthetically pleasing finishes in laptops, smartphones, and appliances, while providing robust mechanical engagement.
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Construction and Building
Ideal for attaching hardware and fixtures to metal or composite structures, ensuring long-lasting connections with minimal installation risk.
Related Standards
To ensure comprehensive and compatible assembly solutions, ISO 14587:2011 references several key international fastener standards:
- ISO 1478 - Tapping screws thread specifications
- ISO 2702 - Mechanical properties and requirements for heat-treated steel tapping screws
- ISO 4759-1 - Tolerances for fasteners (grades A, B, and C)
- ISO 7721 - Countersunk head screw configuration and gauging
- ISO 10664 - Hexalobular internal drive dimensions and performance
- ISO 4042 - Requirements for electroplated coatings on fasteners
- ISO 10683 - Requirements for non-electrolytically applied zinc flake coatings
- ISO 3269 - Acceptance inspection procedures for fasteners
Conclusion
Adhering to ISO 14587:2011 ensures that hexalobular socket raised countersunk (oval) head tapping screws meet global benchmarks for quality, interchangeability, and durability. By following these guidelines, manufacturers and suppliers contribute to the integrity and reliability of industrial, automotive, and consumer product assemblies worldwide. For specialized applications, additional requirements can be referenced from relevant international standards, supporting a tailored approach to fastener selection and use.