ASTM A563/A563M-21

Standard Specification for Carbon and Alloy Steel Nuts (Inch and Metric)

ABSTRACT
This specification covers chemical and mechanical requirements for eight property classes of hex and hex-flange carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. Materials shall be tested and the individual grades shall conform to specified values of material such as hardness and proof load, chemical, and mechanical requirements. Classes 8S3 and 10S3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to those of the steels. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition. When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.
SCOPE
1.1 This specification2 covers chemical and mechanical requirements for eleven grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts.  
Note 1: See Appendix X1 for guidance on suitable application of nut grades.  
1.2 The requirements for any grade of nut may, at the supplier's option, and with notice to the purchaser, be fulfilled by furnishing nuts of one of the stronger grades specified herein unless such substitution is barred in the inquiry and purchase order.  
1.3 Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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.

General Information

• Status: Historical
• Publication Date: 14-Jun-2021
• ICS: 21.060.20 - Nuts
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A563/A563M −21
Standard Specification for
1
Carbon and Alloy Steel Nuts (Inch and Metric)
This standard is issued under the fixed designationA563/A563M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* A194/A194M Specification for Carbon Steel, Alloy Steel,
2
and Stainless Steel Nuts for Bolts for High Pressure or
1.1 This specification covers chemical and mechanical
High Temperature Service, or Both
requirements for eleven grades of carbon and alloy steel nuts
A307 Specification for Carbon Steel Bolts, Studs, and
for general structural and mechanical uses on bolts, studs, and
Threaded Rod 60 000 PSI Tensile Strength
other externally threaded parts.
A354 Specification for Quenched and TemperedAlloy Steel
NOTE 1—See Appendix X1 for guidance on suitable application of nut
Bolts, Studs, and Other Externally Threaded Fasteners
grades.
A394 Specification for Steel Transmission Tower Bolts,
1.2 The requirements for any grade of nut may, at the
Zinc-Coated and Bare
supplier’s option, and with notice to the purchaser, be fulfilled
A449 Specification for Hex Cap Screws, Bolts and Studs,
by furnishing nuts of one of the stronger grades specified
Steel, Heat Treated, 120/105/90 ksi Minimum Tensile
herein unless such substitution is barred in the inquiry and
Strength, General Use
purchase order.
A751 Test Methods and Practices for Chemical Analysis of
Steel Products
1.3 Terms used in this specification are defined in Termi-
B695 Specification for Coatings of Zinc Mechanically De-
nology F1789 unless otherwise defined herein.
posited on Iron and Steel
1.4 The values stated in either SI units or inch-pound units
F606/F606M Test Methods for Determining the Mechanical
are to be regarded separately as standard. The values stated in
Properties of Externally and Internally Threaded
each system are not necessarily exact equivalents; therefore, to
Fasteners, Washers, Direct Tension Indicators, and Rivets
ensure conformance with the standard, each system shall be
F812 Specification for Surface Discontinuities of Nuts, Inch
used independently of the other, and values from the two
and Metric Series
systems shall not be combined.
F1136/F1136M Specification for Zinc/Aluminum Corrosion
1.5 This international standard was developed in accor-
Protective Coatings for Fasteners
dance with internationally recognized principles on standard-
F1470 Practice for Fastener Sampling for Specified Me-
ization established in the Decision on Principles for the
chanical Properties and Performance Inspection
Development of International Standards, Guides and Recom-
F1554 Specification for Anchor Bolts, Steel, 36, 55, and
mendations issued by the World Trade Organization Technical
105-ksi Yield Strength
Barriers to Trade (TBT) Committee.
F1789 Terminology for F16 Mechanical Fasteners
F1941/F1941M Specification for Electrodeposited Coatings
2. Referenced Documents
on Mechanical Fasteners, Inch and Metric
3
F2329/F2329M Specification for Zinc Coating, Hot-Dip,
2.1 ASTM Standards:
Requirements for Application to Carbon and Alloy Steel
Bolts, Screws, Washers, Nuts, and Special Threaded
Fasteners
1
This specification is under the jurisdiction of ASTM Committee F16 on
F2833 Specification for Corrosion Protective Fastener Coat-
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
Nuts, Rivets and Washers.
ings with Zinc Rich Base Coat and Aluminum Organic/
Current edition approved June 15, 2021. Published July 2021. Originally
Inorganic Type
approved in 1966. Last previous edition approved in 2015 as A563 – 15. DOI:
F3019/F3019M Specification for Chromium Free Zinc-
10.1520/A0563_A0563M-21.
2
Flake Composite, with or without Integral Lubricant,
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA – 563 in Section II of that Code.
Corrosion Protective Coatings for Fasteners
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
F3125/F3125M Specification for High Strength Structural
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
BoltsandAssemblies,SteelandAlloySteel,HeatTreated,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Inch Dimensions 120 ksi and 150 ksi Minimum Tensile
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A563 − 15 A563/A563M − 21
Standard Specification for
1
Carbon and Alloy Steel Nuts (Inch and Metric)
This standard is issued under the fixed designation A563;A563/A563M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
2
1.1 This specification covers chemical and mechanical requirements for eighteleven grades of carbon and alloy steel nuts for
general structural and mechanical uses on bolts, studs, and other externally threaded parts.
NOTE 1—See Appendix X1 for guidance on suitable application of nut grades.
1.2 The requirements for any grade of nut may, at the supplier’s option, and with notice to the purchaser, be fulfilled by furnishing
nuts of one of the stronger grades specified herein unless such substitution is barred in the inquiry and purchase order.
1.3 Grades C3 and DH3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to that of the steels
covered in Specifications A242/A242M, A588/A588M, and A709/A709M. The atmospheric corrosion resistance of these steels is
substantially better than that of carbon steel with or without copper addition (see 5.2). When properly exposed to the atmosphere,
these steels can be used bare (uncoated) for many applications.
NOTE 2—A complete metric companion to Specification A563 has been developed—A563M; therefore, no metric equivalents are presented in this
specification.
1.3 Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
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.
2. Referenced Documents
3
2.1 ASTM Standards:
1
This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivets
and Washers.
Current edition approved May 1, 2015June 15, 2021. Published July 2015July 2021. Originally approved in 1966. Last previous edition approved in 20142015 as
A563 – 07aA563 – 15.(2014). DOI: 10.1520/A0563-15.10.1520/A0563_A0563M-21.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA – 563 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A563/A563M − 21
A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High
Temperature Service, or Both
A242/A242M Specification for High-Strength Low-Alloy Structural Steel
A307 Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
4
A325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength (Withdrawn 2016)
A354 Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners
A394 Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare
A449 Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength,
General Use
4
A490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength (Withdrawn 2016)
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A588/A588M Specification for High-Strength Low-Alloy Structural Steel, up to 5
...