ASTM F835M-04

Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws [Metric]

ABSTRACT
This specification covers the requirements for quenched and tempered alloy steel hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws. The screws shall be fabricated from alloy steel made to fine grain practice. The chemical composition of the screw material shall conform to the heat analysis specified. Hardness, tensile strength, yield strength, elongation, and area reduction shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers the requirements for quenched and tempered alloy steel hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws M3 through M20 thread sizes having material properties of ISO 898/1 Property Class 12.9.
1.2 Fasteners meeting this specification are intended for shear type applications and have tensile requirements equivalent to ISO 898/1 Property Class 10.9.
1.3 The hazard statement pertains only to the test method section, Section 11 of this specification. This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 31-Jul-2004
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Relations

• Replaces: ASTM F835M-03 - Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws [Metric]
• Effective Date: 01-Aug-2004
• Replaced By: ASTM F835M-11 - Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws (Metric) (Withdrawn 2015)
• Effective Date: 01-Jun-2011
• Referred By: ASTM F2328M-17(2022) - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts (Metric)
• Effective Date: 01-Aug-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F835M – 04
Standard Specification for
Alloy Steel Socket Button and Flat Countersunk Head Cap
1
Screws (Metric)
This standard is issued under the fixed designation F835M; 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* Bolts, Screws, and Studs, Inch and Metric Series
2.2 ANSI/ASME Standards:
1.1 This specification covers the requirements for quenched
3
B18.3.4M Hexagon Socket Button Head Cap Screws
and tempered alloy steel hexagon socket button (SBHCS) and
B18.3.5M Hexagon Socket Flat Countersunk Head Cap
flat countersunk (SFHCS) head cap screws M3 through M20
3
Screws
thread sizes having material properties of ISO 898/1 Property
4
B18.24.1 Part Identifying Number (PIN) Code System
Class 12.9.
2.3 ISO Standard:
1.2 Fasteners meeting this specification are intended for
898/1 Mechanical Properties of Fasteners, Bolts, Screws
shear type applications and have tensile requirements equiva-
3
and Studs
lent to ISO 898/1 Property Class 10.9.
1.3 The hazard statement pertains only to the test method
3. Ordering Information
section, Section 11 of this specification. This standard does not
3.1 Orders for material under this specification shall in-
purport to address all of the safety problems, if any, associated
clude:
with its use. It is the responsibility of the user of this standard
3.1.1 Quantity (number of screws).
to establish appropriate safety and health practices and
3.1.2 Dimensions, including nominal thread designation,
determine the applicability of regulatory limitations prior to
thread pitch and nominal screw length (millimetres). A stan-
use.
dard part number may be used for this definition.
2. Referenced Documents 3.1.3 Name of the screw: SBHCS or SFHCS.
2
3.1.4 Coating, if required. If a protective finish other than
2.1 ASTM Standards:
black oxide is required, it must be specified on the order or
A751 Test Methods, Practices, andTerminology for Chemi-
product standard.
cal Analysis of Steel Products
3.1.5 Lot testing, if required (see 10.3).
D3951 Practice for Commercial Packaging
3.1.6 Certification, if required (see 14.1).
E3 Guide for Preparation of Metallographic Specimens
3.1.7 ASTM designation and year of issue, and
E18 Test Methods for Rockwell Hardness of Metallic Ma-
3.1.8 Any special requirements.
terials
3.1.9 For establishment of a part identifying system, see
E112 Test Methods for Determining Average Grain Size
ASME B18.24.1.
E384 Test Method for Microindentation Hardness of Mate-
3.2 Example—1000piecesM6 31 325SBHCSlottensile
rials
test, ASTM F835M – XX.
F606M Test Methods for Determining the Mechanical
Properties of Externally and InternallyThreaded Fasteners,
4. Materials and Manufacture
Washers, and Rivets (Metric)
4.1 The screws shall be fabricated from alloy steel made to
F788/F788M Specification for Surface Discontinuities of
fine grain practice. In the event of controversy over grain size,
referee tests on finished screws conducted in accordance with
Test Methods E112 shall prevail.
1
This specification is under the jurisdiction of ASTM Committee F16 on
4.2 Screws shall be cold upset or extruded, or both.
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
Nuts, Rivets and Washers.
4.3 Screws shall be roll threaded.
Current edition approved Aug. 1, 2004. Published August 2004. Originally
approved in 1983. Last previous edition approved in 2003 as F835M – 03. DOI:
10.1520/F0835M-04.
2 3
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 [e-mail]. 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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F835M – 04
A
TABLE 2 Chemical Requirements
4.4 Screws shall be heat treated by quenching in oil from
above the transformation temperature and then tempering by
Composition, %
reheating to at least 380°C to be within the hardness range
Element
Heat Analysis Product Analysis
specified in Table 1.
Carbon 0.30 to 0.48 0.28 to 0.50
4.4.1 The minimum temper
...