Overview
ISO 10914:1996 specifies technical, dimensional and test requirements for hand-operated sockets and box wrenches for spline drive fasteners. Intended primarily for the aeronautic industry, the standard covers tools used for attachment and detachment of metric spline-drive fasteners (per ISO 7403). It defines tool classification, designation and mandatory marking as well as mechanical test criteria to ensure interchangeability, durability and safety.
Key topics and requirements
- Scope and classification
- Applies to Type I (sockets: Class A regular, Class B long, Class C universal joint) and Type II (box wrench, double head, 15” offset - Classes D, E, F by length).
- Dimensional requirements
- Socket and wrench dimensions are given in the standard’s tables; female driving square dimensions must conform to ISO 1174‑1 and spline drive sizes to ISO 7403.
- Driving square sizes and spline nominal sizes are tabulated to ensure interchangeability.
- Material and hardness
- Tools shall have a hardness of 40 HRC to 54 HRC when tested per ISO 6508 (Rockwell hardness).
- Test mandrels must be hardened to minimum 55 HRC with finished engagement surfaces; spline mandrels follow ISO 7403 minimum dimensions with tolerance h8.
- Endurance and proof testing
- Each sample tool shall withstand 2 000 applications of the cyclic torque fatigue load (applied at up to 60 cycles/min), and must sustain the specified proof load after the cyclic test.
- Designation and marking
- Standardized designation format (example: Socket ISO 10914 - 6,3 x 10 - B) and permanent marking requirements (manufacturer/trademark and nominal spline size) are specified to aid traceability.
Applications and who uses it
- Aerospace manufacturers and maintenance organizations for reliable fastening and torque application on spline-drive fasteners.
- Hand tool manufacturers and suppliers to design, certify and label sockets/wrenches compliant with aerospace requirements.
- Quality, inspection and procurement teams to verify dimensional conformity, hardness and endurance testing during acceptance.
- Mechanical and maintenance engineers specifying tools for aircraft assembly, repair and overhaul where spline-drive fasteners are used.
Related standards
- ISO 7403 - Fasteners for aerospace construction: spline drive wrenching configuration (metric)
- ISO 1174‑1 - Driving squares for hand socket tools
- ISO 6508 - Metallic materials - Rockwell hardness test
Keywords: ISO 10914, spline drive sockets, box wrenches, assembly tools, aerospace tools, tool hardness, endurance test, ISO 7403, ISO 1174-1, ISO 6508.