This International Standard specifies the general characteristics, performance and critical dimensions
necessary for interchangeability and compatibility with other components, of forged steel eyebolts grade 4 for
general lifting purposes. These eyebolts can be used for axial and inclined loading.
This International Standard specifies the dimensions of the eyes of eyebolts permitting direct connection with
shackles of the same working load limit as those defined in ISO 2415. These dimensions also allow designs
with a larger eye which can permit direct connection with sling hooks of similar working load limit.
This International Standard covers all significant hazards, hazardous situations and events relevant to
eyebolts grade 4 as defined in Clause 4.
This International Standard is applicable to eyebolts grade 4 for use in the temperature range of −20 ºC to
200 ºC.
This International Standard is not applicable to eyebolts which are not forged in one piece.
This International Standard is not applicable to forged steel eyebolts grade 4 manufactured before the date of
its publication as an International Standard.
BS EN ISO 3266:2010 Referenced Document
EN 10228-1 Non-destructive testing of steel forgings - Part 1: Magnetic particle inspection*， 2016-06-01 Update
EN 10228-2 Non-destructive testing of steel forgings - Part 2: Penetrant testing*， 2016-06-01 Update
ISO 148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method*， 2016-10-01 Update
ISO 148-2 Metallic materials - Charpy pendulum impact test - Part 2: Verification of testing machines*， 2016-10-01 Update
ISO 261 ISO general purpose metric screw threads - General plan
ISO 643 Steels — Micrographic determination of the apparent grain size*， 2020-03-01 Update
ISO 6506-1 Metallic materials - Brinell hardness test - Part 1: Test method*， 2014-10-01 Update
ISO 6508-1 Metallic materials — Rockwell hardness test — Part 1: Test method*， 2023-12-13 Update
ISO 7500-1:2004 Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system
ISO 965-1 ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data — Amendment 1*， 2021-09-29 Update
ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]*， 2017-11-01 Update
2011BS EN ISO 3266:2011 Forged steel eyebolts grade 4 for general lifting purposes
2011BS EN ISO 3266:2010 Forged steel eyebolts grade 4 for general lifting purposes
1984BS 4278:1984 Specification for eyebolts for lifting purposes
BS EN ISO 3266:2010 Forged steel eyebolts grade 4 for general lifting purposes has been changed from BS 4278:1984 Specification for eyebolts for lifting purposes.