ISO 4162:2012 PDF

Overview

ISO 4162:2012 - Hexagon bolts with flange (small series) defines the characteristics of hexagon flange bolts in product grade A while the driving feature is specified to product grade B. It covers bolts with metric threads M5 to M16 and property classes 8.8, 9.8, 10.9 (carbon/alloy steels) and A2‑70 (stainless steel). The standard provides dimensional tables, tolerances, gauging procedures and references to related mechanical and surface-finish requirements.

Key topics and technical requirements

• Scope and designation
  • Applies to small-series hexagon flange bolts; designation examples are shown (e.g., “Hexagon flange bolt ISO 4162:-, M12 × 80 - 8.8”).
• Dimensions and geometry
  • Detailed figures and Table 1 specify head, flange and shank dimensions (full shank and reduced shank types), underhead configurations (types F and U) and wrenching/heights.
• Threads and tolerances
  • Threads follow ISO metric series and tolerances (references include ISO 261 and ISO 965‑2). Tolerance class for external threads is specified (e.g., 6g).
• Material and property classes
  • Mechanical property references: ISO 898‑1 for carbon/alloy steels and ISO 3506‑1 for stainless steel (A2‑70).
• Surface finishes and coatings
  • Electroplating and finish requirements referenced to ISO 4042, zinc‑flake coatings to ISO 10683, and stainless passivation to ISO 16048.
• Acceptance, surface integrity and inspection
  • Acceptance inspection per ISO 3269; surface discontinuity limits per ISO 6157‑1 / ‑3.
• Gauging method (Annex A)
  • Head gauging uses two ring gauges (A and B) to verify hexagon height, wrenching height, corner fill and width across corners.

Applications and users

• Typical applications: machinery, automotive assemblies, equipment manufacturing, and any assembly where flange-bearing hexagon bolts are required with controlled geometry and mechanical properties.
• Primary users:
  • Fastener manufacturers and quality control engineers (dimensioning, gauging, production tolerances)
  • Design and mechanical engineers (component selection and interchangeability)
  • Procurement and purchasers (product specification and designation)
  • Test and inspection labs (acceptance sampling and surface checks)

Related standards

• ISO 261, ISO 965‑2 (threads & tolerances)
• ISO 898‑1, ISO 3506‑1 (mechanical properties)
• ISO 4759‑1 (product grade tolerances)
• ISO 4042, ISO 10683, ISO 16048 (coatings/finishes)
• ISO 3269, ISO 6157‑1/‑3 (inspection & surface integrity)
• Related product standards: ISO 4014, ISO 4017, ISO 4161, ISO 15071

ISO 4162:2012 is a practical, implementation-focused standard for consistent specification, manufacture and inspection of small‑series hexagon flange bolts - useful for designers, manufacturers and quality professionals needing interchangeability and reliable mechanical properties.