SIST EN ISO 4015:2022 PDF

Overview

EN ISO 4015:2022 - Fasteners: hexagon head bolts with reduced shank (shank diameter ≈ pitch diameter) - Product grade B. This CEN-adopted ISO standard specifies the characteristics, dimensions and delivery requirements for partially threaded hexagon head bolts in steel and stainless steel, with metric coarse pitch threads M3 to M20, manufactured to product grade B. It replaces the earlier EN 24015 and aligns dimensional and tolerance rules with current ISO fastener practice.

Key topics and technical requirements

• Scope & materials: Covers steel and corrosion‑resistant stainless steel fasteners, product grade B, thread sizes M3–M20 (including added non‑preferred sizes like M3,5, M7, M18 in the 2022 revision).
• Dimensions & head details: Detailed dimensional tables for M3–M20 (head width s, head height k, shank diameter d ≈ pitch diameter, e, r, x, etc.), plus manufacturer options for head indentation and bearing‑face shape (see Figures 1–2).
• Thread and tolerance rules: Threads are metric coarse pitch; tolerances and product grade requirements reference ISO 4759‑1 (product grades A, B, C). Dimensional options reference ISO 888 and ISO 4753.
• Mechanical properties: Property classes for steel and stainless steel can be selected per ISO 898‑1 (carbon/alloy steel) and ISO 3506‑1 (stainless steel). The 2022 edition adds property class 6.8 (steel) and class 50 (stainless steel).
• Surface treatments & acceptance: Surface coatings and galvanizing referenced (ISO 4042, ISO 10683, ISO 10684). Acceptance inspection and surface discontinuity rules refer to ISO 3269 and ISO 6157‑1.
• Marking and labelling: Clause 6 specifies marking on the product and labelling on packaging for traceability and conformity.

Applications and who uses it

• Applications: Suitable wherever partially threaded hexagon head bolts with a reduced shank are required - common in machinery assemblies, structural connections, equipment manufacture, repair and maintenance where thread/run‑out or shank clearance is needed.
• Users: Fastener manufacturers, design and mechanical engineers, procurement/specification teams, quality inspectors and testing laboratories, and standards committees - anyone specifying or supplying metric hexagon head bolts product grade B.

Related standards (useful references)

• ISO 4014 (hexagon head bolts with full shank)
• ISO 898‑1, ISO 3506‑1 (property classes)
• ISO 4759‑1 (tolerances/product grades)
• ISO 888, ISO 4753 (length and end options)
• ISO 225, ISO 965‑1, ISO 3269, ISO 4042, ISO 6157‑1, ISO 10683, ISO 10684

Keywords: EN ISO 4015:2022, hexagon head bolts with reduced shank, product grade B, M3–M20, metric coarse pitch threads, fastener dimensions, ISO 4759‑1, ISO 898‑1, ISO 3506‑1.