I.S. EN 4301:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Arrangement of marks
   5.1 General
   5.2 General arrangement
6 Coding system
   6.1 Identification marking codes
   6.2 Standard combinations of identification marks
   6.3 Indication on drawings
        6.3.1 General
        6.3.2 Meaning of codes given in example
        6.3.3 Understanding Table 3
7 Character height
8 Writing
9 Depth of marks
10 General marking conditions
   10.1 Introduction
   10.2 Process quality
   10.3 Marking quality
   10.4 Surface treatment
   10.5 Cast/forged parts
   10.6 Temporary production mark
   10.7 Re-marking
   10.8 Final inspection mark
11 Marking methods
   11.1 Permanent markings
   11.2 Temporary markings
Annex A (normative) - Optical Character Recognition (O.C.R.)
Annex B (normative) - Character shapes and optical character
        recognition requirements (O.C.R.) for 5x7 dot matrix
        method
Annex C (normative) - O.C.R. characters - Common characteristics

Defines the coding system for marks, the processes used to produce these marks, as well as the general marking requirements for the identification of aerospace engine items.