EN ISO 4028:2026 PDF

Overview

EN ISO 4028:2026 specifies the requirements for hexagon socket set screws with dog point. This European and International Standard, developed in close cooperation between CEN and ISO, applies to fasteners with metric coarse pitch threads ranging from M1.6 to M30 for steel, and M1.6 to M24 for stainless steel. These set screws are manufactured to product grade A and are not designed for use under tensile load. Where required, the selection of material, hardness class, grade, and further dimensional options can be made according to referenced ISO standards.

This standard ensures clear parameters for manufacturers, distributors, and end users, contributing to reliability and interchangeability across industries that depend on mechanical fasteners.

Key Topics

• Scope of Application
  • Covers hexagon socket set screws with dog point
  • Specification for steel (M1.6 to M30) and stainless steel (M1.6 to M24) threads
  • Product grade A for enhanced precision
• Dimensional Specifications
  • Thread sizes, lengths, and dog point dimensions
  • Reference to ISO 225 and ISO 724 for symbols and basic dimensions
• Materials and Mechanical Properties
  • Steel and stainless steel fastener options
  • Selection of hardness class as per ISO 898-5 (carbon or alloy steel) and ISO 3506-3 (stainless steel)
• Surface and Finish
  • Steel fasteners: as processed, electroplated, or zinc flake coating (ISO 4042, ISO 10683)
  • Stainless steel fasteners: clean and bright or passivated options
• Tolerances and Product Grades
  • Tolerance class 6g for threads, per ISO 965-1
  • ISO 4759-1 for general tolerances in fasteners
• Marking and Labelling
  • Standard requirements for packaging information
  • Optional marking on the product itself if agreed upon

Applications

Hexagon socket set screws with dog point serve a vital role in mechanical engineering, industrial assembly, machinery, and equipment maintenance. Their typical applications include:

• Locating and Securing Components: The dog point allows for precise location in pre-machined holes or slots without damaging the host material.
• Adjustable Assemblies: Utilized in assemblies where adjustments may be required, offering stability without the risk of over-tightening.
• Automotive and Aerospace Engineering: Frequently used in assemblies subject to significant vibration, where secure anchoring is needed.
• Electronics and Instrumentation: Preferred where compact, flush-set screws are necessary to avoid protrusions.

Because EN ISO 4028:2026 defines harmonized requirements, using these fasteners ensures compatibility and replacement potential between manufacturers and across international markets.

Related Standards

• ISO 898-5: Mechanical properties of fasteners made of carbon steel and alloy steel - for hardness class selection
• ISO 3506-3: Mechanical properties of stainless steel fasteners - grade and hardness class selection for stainless steels
• ISO 888: Nominal lengths and thread lengths for bolts, screws, and studs
• ISO 965-1: Tolerances for general purpose metric screw threads
• ISO 4753: Ends of parts with external ISO metric thread
• ISO 4042: Electroplated coating systems for fasteners
• ISO 10683: Zinc flake coating systems applied non-electrolytically to fasteners
• ISO 4759-1: General tolerances for bolts, screws, studs, and nuts
• ISO 8991/8992: Designation and general requirements for fasteners

By adhering to EN ISO 4028:2026 and its referenced documents, organizations benefit from standardized quality, improved safety, and streamlined supply chains in the fasteners industry.

Keywords: hexagon socket set screws, dog point, ISO 4028:2026, EN ISO 4028, fastener standards, metric thread, steel fasteners, stainless steel fasteners, product grade A, mechanical properties, CEN standards, industrial fasteners