ASTM A574M-04

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Designation: A 574M – 04
METRIC
Standard Specification for
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Alloy Steel Socket-Head Cap Screws [Metric]
This standard is issued under the fixed designation A 574M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* F 788/F 788M Specification for Surface Discontinuities of
Bolts, Screws, and Studs, Inch and Metric Series
1.1 This specification covers the requirements for quenched
2.2 ANSI/ASME Standards:
and tempered alloy steel socket-head cap screws 1.6 mm
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B18.3.1M Metric Socket Head Cap Screws
through 48 mm in diameter having a minimum ultimate tensile
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B18.24.1 Part Identifying Number (PIN) Code System
strength of 1220 MPa.
NOTE 1—This specification is the metric companion of Specification 3. Ordering Information
A 574.
3.1 Orders for socket head cap screws under this specifica-
1.2 The following hazard caveat pertains only to the test
tion shall include the following information:
method portion, Section 10, of this specification: This standard
3.1.1 Quantity (number of screws),
does not purport to address all of the safety concerns, if any,
3.1.2 Dimensions, including nominal thread designation,
associated with its use. It is the responsibility of the user of this
thread, pitch, and nominal screw length (millimetres),
standard to establish appropriate safety and health practices
3.1.3 Name of the screw (SHCS),
and determine the applicability of regulatory limitations prior
3.1.4 ASTM designation and year of issue.
to use.
3.2 Orders for socket head cap screws may include the
following optional requirements:
2. Referenced Documents
3.2.1 Inspection at point of manufacture.
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2.1 ASTM Standards:
3.2.2 Coating, if required (see 4.6).
A 751 Test Methods, Practices, and Terminology for
3.2.3 Certified Test Reports (see 9.2).
Chemical Analysis of Steel Products
3.2.4 Additional Testing (see 9.3 and 11.1).
D 3951 Practice for Commercial Packaging
3.2.5 Special Packaging (see 14.1.2).
E 3 Practice for Preparation of Metallographic Specimens
3.2.6 Supplementary Requirement (see S1).
E 18 Test Methods for Rockwell Hardness and Rockwell
3.2.7 Special Requirements.
Superficial Hardness of Metallic Materials
3.2.8 For establishment of a part identifying system, see
E 112 Test Methods for Determining the Average Grain
ASME B18.24.1.
Size
4. Materials and Manufacture
E 384 Test Method for Microindentation Hardness of Ma-
terials
4.1 The screws shall be fabricated from steel made to fine
F 606M Test Methods for Determining the Mechanical
grain practice. In the event of controversy over grain size,
Properties of Externally and InternallyThreaded Fasteners,
referee tests on finished screws conducted in accordance with
Washers, and Rivets [Metric]
Test Methods E 112 shall prevail.
4.2 ScrewsinsizesuptoM20inclusive,andwithlengthsup
to ten times the nominal product size or 150 mm, whichever is
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This specification is under the jurisdiction of ASTM Committee F16 on
shorter, shall be cold headed, except that they may be hot
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
Nuts, Rivets, and Washers.
Current edition approved Aug. 1, 2004. Published August 2004. Originally
approved in 1980. Last previous edition approved in 2000 as A 574M–00.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036.
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Standards volume information, refer to the standard’s Document Summary page on Available from American Society of Mechanical Engineers (ASME), ASME
the ASTM website. International Headquarters, Three Park Ave., New York, NY 10016-5990.
*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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A574M–04
TABLE 2 Chemical Requirements
headed by agreement of the purchaser. Larger sizes and longer
lengthsmaybecoldorhotheaded.ScrewsM42andlargermay
Element Composition, %
be machined. Sockets may be forged or machined at the option
Heat Analysis Product Analysis
of the manufacturer.
Carbon 0.33 to 0.48 0.31 to 0.50
4.3 ScrewsinsizesuptoM24inclusive,andproductlengths
Phosphorus, max 0.035 0.040
up to 150 mm inclusive, shall be roll threaded, except by
Sulfur, max 0.040 0.045
special agreement of the purchaser. Larger products may be
Alloying
...