ASTM F568M-04
(Specification)Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners
Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners
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 and 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 explains the significance of the property class designation numerals.
General Information
Relations
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: F 568M – 04
METRIC
Standard Specification for
Carbon and Alloy Steel Externally Threaded Metric
1
Fasteners
This standard is issued under the fixed designation F 568M; 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* 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
A 153/A 153M 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
A 307 Specification for Carbon Steel Bolts and Studs,
additional requirements, the acceptance of which are subject to
60 000 psi Tensile Strength
negotiation with the supplier, must be included in the order
A 325 Specification for Structural Bolts, Steel, Heat
information (see Section 3).
Treated, 120/105 ksi Minimum Tensile Strength
1.3 Requirementsforsevenoftheninepropertyclasses,4.6,
A 325M 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
A 354 Specification for Quenched and Tempered Alloy
two, 8.8.3 and 10.9.3, are not recognized in ISO standards.
Steel Bolts, Studs, and Other Externally Threaded Fasten-
1.4 Classes 8.8.3 and 10.9.3 bolts, screws, and studs have
ers
atmospheric corrosion resistance and weathering characteris-
A 449 Specification for Quenched and Tempered Steel
tics comparable to those of the steels covered in Specification
Bolts and Studs
A 588/A 588M. The atmospheric corrosion resistance of these
A 490 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
A 490M Specification for High-Strength Steel Bolts,
the atmosphere, these steels can be used bare (uncoated) for
Classes10.9and10.9.3,forStructuralSteelJoints[Metric]
many applications.
A 574 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;
1
This specification is under the jurisdiction of ASTM Committee F16 on
2
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Nuts, Rivets and Washers. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Aug. 1, 2004. Published August 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1979. Last previous edition approved in 2002 as F 568M – 02. 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
---------------------- Page: 1 ----------------------
F568M–04
TABLE 1 Chemical Composition Requirements
Property Nominal Product Product Analysis Element (% by weight) Tempering
Class Diameter, mm Temperature, °C
Material and Treatment CMn B
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.