Overview
ISO 15480:2019 is an international standard developed by the International Organization for Standardization (ISO) that specifies the characteristics of fasteners known as hexagon washer head drilling screws with tapping screw threads. These screws are made of steel and cover thread sizes ranging from ST2.9 to ST6.3 with a defined product grade A. This second edition, published in June 2019, updates and replaces the previous 1999 edition to reflect the latest technical requirements and normative references applicable to these specialized drilling screws.
This standard ensures consistent dimensions, mechanical properties, and thread design for manufacturing and quality assurance, making it essential for industries requiring high-performance fasteners designed for metal sheet drilling and secure fastening.
Key Topics
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Scope and Product Grade: Specifies steel hexagon washer head drilling screws with tapping threads within thread sizes ST2.9 to ST6.3, following product grade A tolerances.
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Dimensions: Detailed dimensional requirements are provided, including thread pitch, diameter, wrenching height, and length. Dimensions align with ISO 225 for consistent definitions.
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Mechanical and Functional Properties: References ISO 10666 for drilling point and tapping screw thread standards, defining mechanical requirements and functional performance characteristics.
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Material and Coatings: Steel is the prescribed material, with options for as-processed or electroplated coatings in accordance with ISO 4042, enhancing corrosion resistance where needed.
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Tolerances and Quality Inspection: Product grade A tolerances are mandatory as per ISO 4759-1, while acceptance inspection follows ISO 3269 to guarantee fastener reliability.
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Designation System: Provides a clear designation format for easy identification, e.g., "Hexagon head drilling screw ISO 15480 – ST3.5 × 16", indicating thread size and nominal length.
Applications
Hexagon washer head drilling screws with tapping screw threads are widely used in applications requiring:
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Sheet Metal Assembly: Ideal for fastening metal sheets and plates without pre-drilled holes, reducing assembly steps and improving efficiency.
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Construction and Manufacturing: Applicable in structural frameworks, HVAC installations, electrical enclosures, and machinery assembly where secure and consistent fastening is critical.
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Automotive and Transportation: Used in vehicle body manufacturing and component assembly that demands durable fasteners with reliable self-drilling and tapping capabilities.
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Electrical and Electronic Enclosures: Ensures secure grounding and fastening in sheet metal enclosures requiring electrical safety and mechanical integrity.
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Maintenance and Repair: Facilitates quick and efficient repair of equipment or metal assemblies, minimizing downtime.
The standard supports consistent quality, interchangeability, and compatibility of fasteners in these varied industrial settings.
Related Standards
ISO 15480:2019 references and complements several important ISO standards related to fasteners, including:
- ISO 225: Fasteners - Symbols and descriptions of dimensions, providing foundational terminology and dimension definitions.
- ISO 10666: Covers mechanical and functional properties specific to drilling screws with tapping threads.
- ISO 1478: Defines thread geometry and requirements for tapping screws.
- ISO 3269: Specifies acceptance inspection criteria for fasteners to assure quality compliance.
- ISO 4042: Details electroplated coating systems to protect fasteners from corrosion.
- ISO 4759-1: Provides tolerances for bolts, screws, studs, and nuts, including product grade A tolerances used in this standard.
- ISO 7053: For hexagon washer head tapping screws, providing related specifications and ensuring consistency in fastener design.
Adherence to these complementary standards ensures comprehensive compliance and optimal performance of fasteners in industrial applications.
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