Overview
EN ISO 14584:2011 / ISO 14584:2011 specifies the characteristics of hexalobular socket raised countersunk head screws of product grade A with metric thread sizes M2 up to and including M10. Published by ISO and adopted by CEN, this second edition (2011) replaces the 2001 edition and standardizes dimensions, tolerances, material/property options and related acceptance and finishing references for these fasteners.
Key topics and technical requirements
- Range and scope: Applies to hexalobular socket raised countersunk head screws, thread sizes M2–M10, product grade A.
- Dimensions and head geometry: Head and socket dimensions are defined (see Table 1 in the standard); gauging of head dimensions follows ISO 7721. The hexalobular socket is accepted and gauged per ISO 10664.
- Threads and tolerances: Threads follow ISO 261 (general-purpose metric threads) with tolerance class 6g and sizing guidance from ISO 965-2.
- Materials and mechanical properties: Steel (property classes such as 4.8), stainless steel (e.g. A2‑70, A3‑70) and non‑ferrous options are referenced; mechanical property standards include ISO 898‑1, ISO 3506‑1 and ISO 8839.
- Product grade and quality: Product grade A requirements and dimensional tolerances are given; tolerance and acceptability criteria reference ISO 4759-1, ISO 6157-1 (surface discontinuities) and ISO 3269 (acceptance inspection).
- Surface finishes and coatings: Electroplated coatings per ISO 4042; non‑electrolytically applied zinc flake coatings per ISO 10683. Additional finishes are by agreement between supplier and purchaser.
- Designation example: Hexalobular socket raised countersunk head screw ISO 14584 - M5 × 20 - 4.8
Applications and users
- Who uses it: Fastener manufacturers, product designers, OEM procurement, quality assurance teams, testing labs and regulatory bodies involved in specifying or verifying metric hexalobular (internal‑lobed) countersunk screws.
- Typical uses: Components and assemblies requiring a low-profile countersunk head with a hexalobular internal drive-commonly specified in precision engineering, electronics enclosures, machinery assemblies and other applications where controlled head geometry, drive engagement and consistent mechanical properties are required.
Related standards (normative references)
Key referenced documents include: ISO 225, ISO 261, ISO 965‑2, ISO 898‑1, ISO 3506‑1, ISO 3269, ISO 4042, ISO 4759‑1, ISO 6157‑1, ISO 7721, ISO 8839, ISO 8992, ISO 10664, ISO 10683.
This standard ensures interoperability, consistent quality and clear specification language for hexalobular socket raised countersunk head screws (EN ISO 14584:2011).
