Overview
ISO 14280:2002 specifies the dimensions and key requirements for metric ribbed drivers (screwdriver bits) intended for insertion into internal cruciform (Phillips-type) ribbed or unribbed drives used on metric screws with nominal thread diameters from 1.6 mm to 20 mm. Published by ISO’s aerospace fastener systems committee, this standard is targeted at the aerospace sector where interchangeability, precision and controlled tolerances are essential.
Key topics and technical requirements
- Scope: Metric ribbed drivers for internal cruciform ribbed or unribbed drives, nominal thread diameter range 1.6 mm–20 mm.
- Dimensions & tolerances: All dimensions and tolerances are expressed in millimetres and detailed in the standard’s figures and tables (driver codes R0–R5).
- Material & hardness: Drivers shall be manufactured from tool steel and heat-treated to a tip hardness of 56 HRC to 62 HRC over the tip area (minimum L dimension).
- Run-out tolerancing: Presentation of run-out tolerances conforms to ISO 1101 (geometrical product specifications).
- Designation & coding: The standard defines driver designation rules and specifies that drivers must only be used with drives having matching coding.
- Patent note: The standard acknowledges potential patent rights (Phillips Screw Company - ACR Multi‑Ribbed Phillips). ISO records that licensing negotiations are available under reasonable, non-discriminatory terms; users should verify IP obligations before production or procurement.
Applications and who uses it
ISO 14280 is practical for organizations that design, procure, manufacture, inspect or maintain precision fasteners and assembly tooling in regulated industries:
- Aerospace OEMs and suppliers for control of screwdrive interfaces and tool compatibility.
- Tool and bit manufacturers producing metric ribbed Phillips drivers to aerospace tolerances.
- Quality and inspection engineers establishing acceptance criteria and inspection protocols.
- Maintenance and MRO operations ensuring correct driver selection for safety‑critical assemblies.
- Procurement and compliance teams verifying vendor conformity to aerospace fastener standards.
Related standards
- ISO 12256 - internal cruciform, ribbed drives (metric series)
- ISO 14279:2002 - internal cruciform drives (metric series)
- ISO 1101 - geometrical tolerancing (run-out and form tolerances)
By aligning driver design, hardness, dimensions and run-out tolerances with ISO 14280, stakeholders improve interchangeability, reduce fastener damage and support consistent, auditable assembly practices in aerospace and other high‑reliability industries. Keywords: ISO 14280, ribbed drivers, internal cruciform drive, metric series, aerospace fastener standards, Phillips ACR Multi‑Ribbed.