Overview
ISO 10102:2018 - Assembly tools for screws and nuts - double-headed open-ended engineers' wrenches - specifies the outside dimensions for double-headed open-ended engineers’ wrenches. The standard defines the overall lengths and maximum head (jaw) thicknesses for a range of nominal flat (s × s) pairings. ISO 10102:2018 covers dimensional requirements only; detailed technical specifications (materials, heat treatment, mechanical properties) are given in other standards such as ISO 1711‑1:2016.
Key Topics
- Scope and purpose: establishes outside dimensions (overall length and maximum head thickness) for double-ended open-ended wrenches used as assembly tools for screws and nuts.
- Dimension table: Table 1 lists nominal pairings (s × s) and corresponding minimum/maximum overall lengths and maximum head thicknesses for each size. Example: a wrench designated 18 × 21 has specified overall length and head thickness values in the table.
- Designation: a compliant wrench is designated by referencing ISO 10102 and the nominal pairing (e.g., “Clé ISO 10102 - 18 × 21”).
- Marking requirements: wrenches must be permanently and legibly marked with nominal flat dimensions and the manufacturer’s name or trademark.
- Normative references: the standard refers to related standards for tolerances and envelope widths, notably ISO 691 (tolerances on openings), ISO 3318 (maximum head envelope widths), and ISO 1703 (designation and nomenclature).
- Informative illustration: a figure is provided for illustrative purposes and does not constrain manufacturer design.
Applications
ISO 10102:2018 is practical for:
- Tool manufacturers and designers specifying and producing double-headed open-ended engineers’ wrenches to ensure consistent outside dimensions and interchangeability.
- Procurement and specification writers who need concise dimensional requirements for purchasing and cataloguing hand tools.
- Quality control and inspection teams verifying that wrench lengths and head thicknesses meet international dimensional standards.
- Technical writers and standards committees referencing dimensional baselines when preparing product data sheets or complementary specifications.
Related standards
- ISO 1703:2005 - Designation and nomenclature for assembly tools
- ISO 1711‑1:2016 - Technical specifications for wrenches and sockets (series C)
- ISO 3318 - Maximum head envelope widths for wrenches
- ISO 691 - Tolerances on openings (wrench and bit sizes)
- ISO 1085 - Pairing of wrench openings
Using ISO 10102:2018 helps ensure consistent outside dimensions for double-headed open-ended engineers’ wrenches across manufacturing, procurement, and inspection workflows, improving compatibility and reducing specification ambiguity.