AS/NZS 1214:2016
Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
Specifies material, process, dimensional and some performance requirements for hot dip spun galvanized coatings applied to coarse threaded steel fasteners from M8 up to and including M64 and for property classes up to and including 10.9 for bolts, screws and studs and 12 for nuts. It is not recommended to hot dip galvanize threaded fasteners in diameters smaller than M8 and/or with pitches below 1,25 mm. Note that the proof loads and stresses under proof load of oversize tapped nuts with threads M8 and M10 and the ultimate tensile loads and proof loads of undersize threaded bolts and screws with threads M8 and M10 are reduced as compared to the values specified in ISO 898-2 and ISO 898-1 respectively and are specified in Annex A. It primarily concerns the spun hot dip galvanizing of threaded steel fasteners, but it may also be applied to other threaded steel parts. The specifications given in this standard may also be applied to non-threaded steel parts such as washers. Adopted with national modifications from ISO 10684:2004.
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CONTENTS
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
4.1 Raw material of parts
4.2 Zinc
5 Hot dip galvanizing procedures and precautions
5.1 Stress relief
5.2 Cleaning and pickling
5.3 Baking
5.4 Fluxing
5.5 Hot dip galvanizing
5.6 Spinning and quenching
5.7 Special requirements for nuts
5.8 Post-treatment
6 Requirements on thread tolerances and additional marking
6.1 General
6.2 Requirements and precautions in assembling hot dip galvanized threaded fasteners
6.3 Special requirements for marking when supplying fasteners in sealed containers
7 Mechanical properties of nuts tapped oversize and undersize threaded bolts, screws andstuds
8 Coating requirements
8.1 Appearance of zinc coating
8.2 Considerations for hot dip galvanized washers
8.3 Zinc coating thickness
8.4 Adhesion of zinc coating
9 Lubrication
10 Ordering requirements
11 Designation
Annex A (normative) Special requirements for bolts, screws and nuts with thread sizes M8 andM10
Annex B (normative) Limits of sizes for hot dip galvanized internal and external screw thread M8
Annex C (informative) Calculation of minimum ultimate tensile loads and proof loads for boltsand screws M8 and M10 with threads undersized to tolerance class 6az
Annex D (informative) Surface areas of bolts, screws and nuts
Annex E (normative) Adherence of hot-dip galvanized coating
Annex F (informative) Strength of hot dip galvanized bolt or screw and nut assemblies
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CONTENTS
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
4.1 Raw material of parts
4.2 Zinc
5 Hot dip galvanizing procedures and precautions
5.1 Stress relief
5.2 Cleaning and pickling
5.3 Baking
5.4 Fluxing
5.5 Hot dip galvanizing
5.6 Spinning and quenching
5.7 Special requirements for nuts
5.8 Post-treatment
6 Requirements on thread tolerances and additional marking
6.1 General
6.2 Requirements and precautions in assembling hot dip galvanized threaded fasteners
6.3 Special requirements for marking when supplying fasteners in sealed containers
7 Mechanical properties of nuts tapped oversize and undersize threaded bolts, screws andstuds
8 Coating requirements
8.1 Appearance of zinc coating
8.2 Considerations for hot dip galvanized washers
8.3 Zinc coating thickness
8.4 Adhesion of zinc coating
9 Lubrication
10 Ordering requirements
11 Designation
Annex A (normative) Special requirements for bolts, screws and nuts with thread sizes M8 andM10
Annex B (normative) Limits of sizes for hot dip galvanized internal and external screw thread M8
Annex C (informative) Calculation of minimum ultimate tensile loads and proof loads for boltsand screws M8 and M10 with threads undersized to tolerance class 6az
Annex D (informative) Surface areas of bolts, screws and nuts
Annex E (normative) Adherence of hot-dip galvanized coating
Annex F (informative) Strength of hot dip galvanized bolt or screw and nut assemblies
AS/NZS 1214:2016
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.