ASTM A574-17

Standard Specification for Alloy Steel Socket-Head Cap Screws

ABSTRACT
This specification covers the requirements for quenched and tempered alloy steel socket-head cap screws. The screws shall be fabricated from steel made to fine grain practice and shall be alloy steel conforming to the chemical composition specified. Different tests shall be conducted in order to determine the following mechanical properties of screws: tensile or wedge strength, proof load, yield strength, elongation, Rockwell hardness, and Vickers hardness.
SCOPE
1.1 This specification covers the requirements for quenched and tempered alloy steel hexagon socket-head cap screws, 0.060 through 4 in. in diameter where high strength is required.  
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 The following hazard caveat pertains only to the test method portions, sections 5.1, 5.6, 8, and 12, of this specification. 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 and health practices and determine the applicability of regulatory limitations prior to use.  
1.4 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: 31-May-2017
• ICS: 21.060.10 - Bolts, screws, studs
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A574 −17
Standard Specification for
1
Alloy Steel Socket-Head Cap Screws
This standard is issued under the fixed designation A574; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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* chanical Properties and Performance Inspection
F1789Terminology for F16 Mechanical Fasteners
1.1 This specification covers the requirements for quenched
F1940Test Method for Process Control Verification to
and tempered alloy steel hexagon socket-head cap screws,
Prevent Hydrogen Embrittlement in Plated or Coated
0.060through4in.indiameterwherehighstrengthisrequired.
Fasteners
1.2 The values stated in inch-pound units are to be regarded
F2282SpecificationforQualityAssuranceRequirementsfor
asstandard.Nootherunitsofmeasurementareincludedinthis
Carbon and Alloy Steel Wire, Rods, and Bars for Me-
standard.
chanical Fasteners
1.3 The following hazard caveat pertains only to the test
F2328Test Method for Determining Decarburization and
method portions, sections 5.1, 5.6, 8, and 12, of this specifi- Carburization in Hardened and Tempered Threaded Steel
cation. This standard does not purport to address all of the
Bolts, Screws, Studs, and Nuts
3
safety concerns, if any, associated with its use. It is the
2.2 ASME Standards:
responsibility of the user of this standard to establish appro-
B18.3Socket Cap, Shoulder, and Set Screws
priate safety and health practices and determine the applica-
B18.12Glossary of Terms for Mechanical Fasteners
bility of regulatory limitations prior to use.
B18.24Part Identifying Number (PIN) Code System Stan-
1.4 This international standard was developed in accor-
dard for B18 Fastener Products
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 Definitions of Terms Specific to This Standard—The
mendations issued by the World Trade Organization Technical
definition of terms used in this specification shall be as
Barriers to Trade (TBT) Committee.
specified in Terminology F1789, ASME B18.12, or the appli-
cable referenced standards, unless otherwise defined herein. In
2. Referenced Documents
the event that there are differences for a given term, ASTM
2
2.1 ASTM Standards:
definitions shall be used.
A751Test Methods, Practices, and Terminology for Chemi-
4. Ordering Information
cal Analysis of Steel Products
E112Test Methods for Determining Average Grain Size
4.1 Orders for socket head cap screws under this specifica-
F606/F606MTest Methods for Determining the Mechanical
tion shall include the following information:
Properties of Externally and Internally Threaded
4.1.1 ASTM designation and year of issue.
Fasteners, Washers, Direct Tension Indicators, and Rivets
4.1.2 Name of the screw (SHCS).
F788Specification for Surface Discontinuities of Bolts,
4.1.3 Quantity (number of pieces by size).
Screws, and Studs, Inch and Metric Series
4.1.4 Dimensions, including nominal thread designation,
F1470Practice for Fastener Sampling for Specified Me-
thread pitch, and nominal screw length.
4.2 Orders for socket head cap screws shall include the
1 following optional requirements if specified by the purchaser:
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, 4.2.1 Inspection at point of manufacture.
Nuts, Rivets and Washers.
4.2.2 Coating, if a protective finish other than those, which
Current edition approved June 1, 2017. Published June 2017. Originally
are described in 5.5 is required, it must be specified (see 5.6).
approved in 1967. Last previous edition approved in 2016 as A574–16. DOI:
10.1520/A0574-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from American Society of Mechanical Engineers (ASME), ASME
Standards volume information, refer to the standard’s Document Summary page on International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
the ASTM website. www.asme.org.
*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

---------------------- Page: 1 ----------------------
A574−17
4.2.3 Test reports or certificate of conformance, as required (1) bright uncoated, (2) thermal black oxide, or (3) chemical
(see Section 15)
...

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: A574 − 16 A574 − 17
Standard Specification for
1
Alloy Steel Socket-Head Cap Screws
This standard is issued under the fixed designation A574; 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*
1.1 This specification covers the requirements for quenched and tempered alloy steel hexagon socket-head cap screws, 0.060
through 4 in. in diameter where high strength is required.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
1.3 The following hazard caveat pertains only to the test method portions, sections 5.1, 5.6, 8, and 12, of this specification. 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 and health practices and determine the applicability of regulatory limitations prior
to use.
1.4 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
2
2.1 ASTM Standards:
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
E112 Test Methods for Determining Average Grain Size
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners,
Washers, Direct Tension Indicators, and Rivets
F788 Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
F1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
F2282 Specification for Quality Assurance Requirements for Carbon and Alloy Steel Wire, Rods, and Bars for Mechanical
Fasteners
F2328 Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts,
Screws, Studs, and Nuts
3
2.2 ASME Standards:
B18.3 Socket Cap, Shoulder, and Set Screws
B18.12 Glossary of Terms for Mechanical Fasteners
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
3. Terminology
3.1 Definitions of Terms Specific to This Standard—The definition of terms used in this specification shall be as specified in
Terminology F1789, ASME B18.12, or the applicable referenced standards, unless otherwise defined herein. In the event that there
are differences for a given term, ASTM definitions shall be used.
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 Oct. 1, 2016June 1, 2017. Published November 2016June 2017. Originally approved in 1967. Last previous edition approved in 20132016 as
A574 – 13.A574 – 16. DOI: 10.1520/A0574-16.10.1520/A0574-17.
2
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.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, ThreeTwo Park Ave., New York, NY 10016-5990,
http://www.asme.org.
*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

---------------------- Page: 1 ----------------------
A574 − 17
4. Ordering Information
4.1 Orders for socket head cap screws under this specification shall include the following information:
4.1.1 ASTM designation and year of issue.
4.1.2 Name of the screw (SHCS).
4.1.3 Quantity (number of pieces by size).
4.1.4 Dimensions, including nominal thread designation, thread pitch, and nominal screw length.
4.2 Orders for socket head cap screws shall include th
...