ASTM F568M-07
(Specification)Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Withdrawn 2012)
Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Withdrawn 2012)
ABSTRACT
This specification covers the chemical and mechanical requirements for nine property classes (Property Class 4.6, 4.8, 5.8, 8.8, 8.8.3, 9.8, 10.9, 10.9.3, and 12.9) of carbon and alloy steel externally threaded fasteners in nominal thread diameters M1.6 through M100 suited for use in general engineering applications. It does not cover the dimensional requirements for fasteners of any property class. The steel used to manufacture bolts, screws, and studs that are covered here shall be made by the open-hearth, basic-oxygen, or electric-furnace process. The fasteners shall adhere to specified values of elemental chemical compositions, which shall be examined by heat and product analyses. Each property class shall also conform to individually specified values of the following mechanical properties: proof load, wedge and axial tensile strengths, yield strength, elongation, reduction of area, surface hardness, Rockwell hardness, Vickers hardness, and stress area.
SCOPE
1.1 This specification covers chemical and mechanical requirements for nine property classes of carbon and alloy steel externally threaded metric fasteners in nominal thread diameters M1.6 through M100 suited for use in general engineering applications.
1.2 This specification does not cover dimensional requirements for fasteners of any property class. When referencing this specification for procurement purposes, it is mandatory that size, type, style, and any special dimensions of the product be additionally specified.
1.2.1 In case of any conflict in requirements, the requirements of the individual product specification shall take precedence over those of this general specification.
1.2.2 The purchaser may specify additional requirements which do not negate any of the provisions of this general specification or of the individual product specification. Such additional requirements, the acceptance of which are subject to negotiation with the supplier, must be included in the order information (see Section 3).
1.3 Requirements for seven of the nine property classes, 4.6, 4.8, 5.8, 8.8, 9.8, 10.9, and 12.9, are essentially identical with requirements given for these classes in ISO 898-1. The other two, 8.8.3 and 10.9.3, are not recognized in ISO standards.
1.4 Classes 8.8.3 and 10.9.3 bolts, screws, and studs have atmospheric corrosion resistance and weathering characteristics comparable to those of the steels covered in Specification A 588/A 588M. 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.
1.5 When agreed on by the purchaser, Class 5.8 fasteners may be supplied when either Classes 4.6 or 4.8 are ordered; Class 4.8 may be supplied when Class 4.6 is ordered; Class 8.8.3 may be supplied when Class 8.8 is ordered; and Class 10.9.3 may be supplied when Class 10.9 is ordered.
1.6 The product size range for which each property class is applicable is given in Table 1 and Table 2 on chemical composition requirements, and the mechanical requirements table (see Table 3).
1.7 Appendix X1 gives conversion guidance to assist designers and purchasers in the selection of a suitable property class.
1.8 Appendix X2 explains the significance of the property class designation numerals.
WITHDRAWN RATIONALE
This specification covers chemical and mechanical requirements for nine property classes of carbon and alloy steel externally threaded metric fasteners in nominal thread diameters M1.6 through M100 suited for use in general engineering applications.
Formerly under the jurisdiction of Committee F16 on Fasteners, this specification was withdrawn in January 2012 because ISO 898-1 is the preeminent world standard for metric externally threaded fasteners. The existing Specification is referenced in no other ASTM standards. The existin...
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F568M – 07
Standard Specification for
Carbon and Alloy Steel Externally Threaded Metric
1
Fasteners (Metric)
This standard is issued under the fixed designation F568M; 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 Department of Defense.
1. Scope* Class 4.8 may be supplied when Class 4.6 is ordered; Class
8.8.3 may be supplied when Class 8.8 is ordered; and Class
1.1 This specification covers chemical and mechanical re-
10.9.3 may be supplied when Class 10.9 is ordered.
quirements for nine property classes of carbon and alloy steel
1.6 The product size range for which each property class is
externally threaded metric fasteners in nominal thread diam-
applicable is given in Table 1 and Table 2 on chemical
eters M1.6 through M100 suited for use in general engineering
composition requirements, and the mechanical requirements
applications.
table (see Table 3).
1.2 This specification does not cover dimensional require-
1.7 Appendix X1 gives conversion guidance to assist de-
ments for fasteners of any property class. When referencing
signers and purchasers in the selection of a suitable property
this specification for procurement purposes, it is mandatory
class.
that size, type, style, and any special dimensions of the product
1.8 Appendix X2 explains the significance of the property
be additionally specified.
class designation numerals.
1.2.1 In case of any conflict in requirements, the require-
ments of the individual product specification shall take prece-
2. Referenced Documents
dence over those of this general specification.
2
2.1 ASTM Standards:
1.2.2 The purchaser may specify additional requirements
A153/A153M Specification for Zinc Coating (Hot-Dip) on
which do not negate any of the provisions of this general
Iron and Steel Hardware
specification or of the individual product specification. Such
A307 Specification for Carbon Steel Bolts and Studs, 60
additional requirements, the acceptance of which are subject to
000 PSI Tensile Strength
negotiation with the supplier, must be included in the order
A325 SpecificationforStructuralBolts,Steel,HeatTreated,
information (see Section 3).
120/105 ksi Minimum Tensile Strength
1.3 Requirementsforsevenoftheninepropertyclasses,4.6,
A325M Specification for Structural Bolts, Steel, Heat
4.8, 5.8, 8.8, 9.8, 10.9, and 12.9, are essentially identical with
Treated 830 MPa Minimum Tensile Strength (Metric)
requirements given for these classes in ISO 898-1. The other
A354 SpecificationforQuenchedandTemperedAlloySteel
two, 8.8.3 and 10.9.3, are not recognized in ISO standards.
Bolts, Studs, and Other Externally Threaded Fasteners
1.4 Classes 8.8.3 and 10.9.3 bolts, screws, and studs have
A449 Specification for Hex Cap Screws, Bolts and Studs,
atmospheric corrosion resistance and weathering characteris-
Steel, Heat Treated, 120/105/90 ksi Minimum Tensile
tics comparable to those of the steels covered in Specification
Strength, General Use
A588/A588M. The atmospheric corrosion resistance of these
A490 Specification for Structural Bolts, Alloy Steel, Heat
steels is substantially better than that of carbon steel with or
Treated, 150 ksi Minimum Tensile Strength
without copper addition. See 5.2. When properly exposed to
A490M SpecificationforHigh-StrengthSteelBolts,Classes
the atmosphere, these steels can be used bare (uncoated) for
10.9 and 10.9.3, for Structural Steel Joints (Metric)
many applications.
A574 Specification for Alloy Steel Socket-Head Cap
1.5 When agreed on by the purchaser, Class 5.8 fasteners
Screws
may be supplied when either Classes 4.6 or 4.8 are ordered;
A588/A588M Specification for High-Strength Low-Alloy
Structural Steel, up to 50 ksi [345 MPa] Minimum Yield
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,
2
Nuts, Rivets and Washers. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2007. Published January 2008. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1979. Last previous edition approved in 2004 as F568M – 04. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F0568M-07. 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.
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F568M – 07
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