ASTM F2329/F2329M-15(2023)
(Specification)Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
ABSTRACT
This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process. The zinc used for the coating shall conform to the chemical composition required. The following tests shall be made to ensure that the zinc coating is being furnished in accordance with this specification: coating thickness; finish and appearance; embrittlement test; and adhesion test.
SCOPE
1.1 This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners. It also provides for minor coating repairs. Nails and rivets are not included in this specification.
1.2 It is intended to be applicable to fasteners that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc).
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2329/F2329M − 15 (Reapproved 2023)
Standard Specification for
Zinc Coating, Hot-Dip, Requirements for Application to
Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and
1
Special Threaded Fasteners
This standard is issued under the fixed designation F2329/F2329M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Iron and Steel Hardware
A394 Specification for Steel Transmission Tower Bolts,
1.1 This specification covers the requirements for hot-dip
Zinc-Coated and Bare
zinc coating applied to carbon steel and alloy steel bolts,
A563 Specification for Carbon and Alloy Steel Nuts (Metric)
screws, washers, nuts, and special threaded fasteners. It also
A0563_A0563M
provides for minor coating repairs. Nails and rivets are not
A563M Specification for Carbon and Alloy Steel Nuts (Met-
included in this specification.
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ric) (Withdrawn 2021)
1.2 It is intended to be applicable to fasteners that are
A780/A780M Practice for Repair of Damaged and Uncoated
centrifuged or otherwise handled to remove excess galvanizing
Areas of Hot-Dip Galvanized Coatings
bath metal (free zinc).
B487 Test Method for Measurement of Metal and Oxide
1.3 The values stated in either SI units or inch-pound units Coating Thickness by Microscopical Examination of
Cross Section
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each E376 Practice for Measuring Coating Thickness by
Magnetic-Field or Eddy Current (Electromagnetic) Test-
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance ing Methods
F606/F606M Test Methods for Determining the Mechanical
with the standard.
Properties of Externally and Internally Threaded
1.4 This standard does not purport to address all of the
Fasteners, Washers, Direct Tension Indicators, and Rivets
safety concerns, if any, associated with its use. It is the
F1470 Practice for Fastener Sampling for Specified Me-
responsibility of the user of this standard to establish appro-
chanical Properties and Performance Inspection
priate safety, health, and environmental practices and deter-
F1789 Terminology for F16 Mechanical Fasteners
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions:
ization established in the Decision on Principles for the
3.1.1 Terms used in this specification are defined in Termi-
Development of International Standards, Guides and Recom-
nology F1789 unless otherwise defined in this specification.
mendations issued by the World Trade Organization Technical
3.1.2 batch lot—quantity of identical parts cleaned, pickled,
Barriers to Trade (TBT) Committee.
fluxed, and galvanized together at one time in a galvanizing
basket.
2. Referenced Documents
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3.1.3 galvanizing—hot-dip zinc coating.
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on
3.1.4 high temperature galvanizing—galvanizing process
carried out in a ceramic vessel (kettle) at an approximate
temperature ranging between 990 °F and 1040 °F [530 °C and
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This specification is under the jurisdiction of ASTM Committee F16 on
560 °C].
Fasteners and is the direct responsibility of Subcommittee F16.03 on Coatings on
3.1.5 hot-dip zinc coating of mechanical fasteners—process
Fasteners.
Current edition approved Nov. 1, 2023. Published November 2023. Originally
whereby fasteners are zinc coated by immersion in a bath of
approved in 2005. Last previous edition approved in 2015 as F2329 – 15. DOI:
molten zinc, resulting in the formation of the iron/zinc alloy
10.1520/F2329_F2329-15R23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
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F2329/F2329M − 15 (2023)
A
TABLE 1 Process Control of Batch Lot
coating and a zinc coating at the surface of the fastener. This
S
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