Overview
ISO 1207:2011 is an international standard published by the International Organization for Standardization (ISO) that specifies the characteristics of slotted cheese head screws of product grade A. These screws come with metric threads ranging from M1.6 up to M10 inclusive. As a third edition update, this 2011 standard replaces the previous ISO 1207:1992 and introduces technical revisions to enhance consistency, quality, and compatibility in fastener production and application worldwide.
This standard ensures uniformity in dimensions, materials, mechanical properties, and tolerances for slotted cheese head screws, which are widely used in mechanical assemblies and precision engineering. It harmonizes specifications with other relevant ISO standards related to threads, mechanical properties, coatings, and acceptance inspection, thereby facilitating global trade and interoperability.
Key Topics
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Scope and Application
Specifies product grade A slotted cheese head screws with thread sizes from M1.6 to M10, suitable for various mechanical fastening purposes.
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Dimensions and Tolerances
Defines precise dimensions including head heights, diameters, slot widths, and thread pitches following ISO 225. Tolerances are in accordance with ISO 4759-1, ensuring interchangeability and reliable assembly.
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Material and Mechanical Properties
Covers screws made from steel, stainless steel, and non-ferrous metals. Mechanical properties align with ISO 898-1 (carbon and alloy steel), ISO 3506-1 (corrosion-resistant stainless steel), and ISO 8839 (non-ferrous metals), providing clear classification by property class (e.g., 4.8, 5.8, A2-50).
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Surface Finishes and Coatings
Addresses requirements for electroplated coatings (ISO 4042), passivation of stainless steel (ISO 16048), and non-electrolytically applied zinc flake coatings (ISO 10683). This section supports corrosion resistance and application-specific durability.
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Inspection and Quality Assurance
Acceptance inspection criteria are guided by ISO 3269. Surface discontinuities limits follow ISO 6157-1. These ensure product compliance and reliability in service.
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Designation System
Standardized naming convention for the screws includes thread size, nominal length, and property class for clear identification, e.g., "Cheese head screw ISO 1207 - M5 × 20 - 4.8".
Applications
Slotted cheese head screws standardized under ISO 1207:2011 are extensively used in applications requiring:
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Precision Fastening
Ideal for mechanical, electronic, and electrical equipment assemblies where accurate fit and consistent performance are critical.
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General Construction and Manufacturing
Common in machines, automotive components, instruments, and equipment requiring fasteners with reliable thread engagement and load capacity.
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Corrosion-Resistant Assemblies
Stainless steel versions are suitable for outdoor, marine, and chemical environments due to specified coatings and passivation treatments.
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Maintenance and Repair
Enables standardization in replacement parts, reducing downtime and ensuring compatibility with existing assemblies.
Related Standards
ISO 1207:2011 references and aligns with several key ISO standards to ensure full integration within the fastener ecosystem:
- ISO 225 - Symbols and descriptions of fastener dimensions
- ISO 261, ISO 965-2, ISO 965-3 - Metric screw thread dimensions and tolerances
- ISO 898-1 - Mechanical properties of carbon and alloy steel fasteners
- ISO 3506-1 - Mechanical properties of stainless steel fasteners
- ISO 4042 - Electroplated coatings for fasteners
- ISO 10683 - Non-electrolytically applied zinc flake coatings
- ISO 3269 - Acceptance inspection for fasteners
- ISO 4759-1 - Tolerances for fasteners of product grades A, B, and C
- ISO 6157-1 - Surface discontinuities limits
Utilizing these harmonized standards ensures that slotted cheese head screws comply with both dimensional and performance criteria expected in modern engineering practices.
ISO 1207:2011 provides manufacturers, designers, and quality professionals with a comprehensive framework for producing and specifying slotted cheese head screws of product grade A. This standard supports interoperability, quality assurance, and global trade by defining exact parameters for fastener characteristics, materials, finishes, and inspection.