NBN EN ISO 4042 : 1ED 99

1 Scope
2 Normative references
3 Terms and definitions
4 Dimensional requirements and gauging
      4.1 Dimensional requirements before electroplating
      4.2 Dimensional requirements after electroplating
5 Other coating requirements
6 Hydrogen embrittlement relief
7 Corrosion protection
8 Applicability to fasteners that cut or form their own
      mating threads
9 Specification of coating thickness
10 Measurement of coating thickness
      10.1 Local thickness
      10.2 Batch average thickness
      10.3 Agreement on test method
11 Sampling for thickness tests
12 Ordering requirements for electroplating
13 Designation
Annex A (informative) Hydrogen embrittlement relief
Annex B (informative) Salt spray corrosion protection
                      performance of metallic coatings
Annex C (informative) Guidance on procedures that may be
                      adopted to accommodate thick coatings
Annex D (normative) Determination of batch average thickness
Annex E (normative) Designation code, system A, for
                    electroplated coatings on threaded parts
Annex F (informative) Examples for coating designation
Annex G (informative) Surface areas of bolts, screws and nuts
Bibliography

Defines dimensional requirements for electroplated fasteners of steel or copper alloy. Defines thicknesses of coating and provides recommendations for hydrogen embrittlement relief for fasteners having high tensile strength or hardness and for surface-hardened fasteners. Deals mainly with the electroplating of threaded fasteners, but may also be applicable to other threaded parts, and non-threaded parts eg. washers and pins.