ASTM F835-18
(Specification)Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws
Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws
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) 0.060 through 0.625 thread sizes and flat countersunk (SFHCS) 0.060 through 1.5 thread sizes head cap screws having material properties for high-strength requirements.
1.2 Fasteners meeting this specification are intended for shear-type applications and have tensile requirements ranging from 122 to 150 ksi.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 The hazard statement applies only to the test method section, Section 11, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
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Designation:F835 −18
Standard Specification for
Alloy Steel Socket Button and Flat Countersunk Head Cap
1
Screws
ThisstandardisissuedunderthefixeddesignationF835;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
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* D3951Practice for Commercial Packaging
E3Guide for Preparation of Metallographic Specimens
1.1 This specification covers the requirements for quenched
E18Test Methods for Rockwell Hardness of Metallic Ma-
and tempered alloy steel hexagon socket button (SBHCS)
terials
0.060through0.625threadsizesandflatcountersunk(SFHCS)
E112Test Methods for Determining Average Grain Size
0.060through1.5threadsizesheadcapscrewshavingmaterial
E384Test Method for Microindentation Hardness of Mate-
properties for high-strength requirements.
rials
1.2 Fasteners meeting this specification are intended for
F606/F606MTest Methods for Determining the Mechanical
shear-type applications and have tensile requirements ranging
Properties of Externally and Internally Threaded
from 122 to 150 ksi.
Fasteners, Washers, Direct Tension Indicators, and Rivets
1.3 Thevaluesstatedininch-poundunitsaretoberegarded F788Specification for Surface Discontinuities of Bolts,
Screws, and Studs, Inch and Metric Series
asstandard.Nootherunitsofmeasurementareincludedinthis
3
standard.
2.2 ASME Standards:
B18.3Socket Cap, Shoulder and Set Screws—Inch Series
1.4 The hazard statement applies only to the test method
section, Section 11, of this specification. This standard does B18.24Part Identifying Number (PIN) Code System Stan-
dard for B18 Fastener Products
not purport to address all of the safety concerns, if any,
associatedwithitsuse.Itistheresponsibilityoftheuserofthis
3. Ordering Information
standard to establish appropriate safety, health, and environ-
mental practices and determine the applicability of regulatory
3.1 Ordersformaterialunderthisspecificationshallinclude
limitations prior to use.
the following:
1.5 This international standard was developed in accor-
3.1.1 Quantity (number of screws).
dance with internationally recognized principles on standard-
3.1.2 Dimensions, including nominal thread designation,
ization established in the Decision on Principles for the
thread pitch, and nominal screw length (inches). A standard
Development of International Standards, Guides and Recom-
part number may be used for this definition.
mendations issued by the World Trade Organization Technical
3.1.3 Name of the screw: SBHCS or SFHCS.
Barriers to Trade (TBT) Committee.
3.1.4 Coating, if required. If a protective finish other than
black oxide is required, it must be specified on the order or
2. Referenced Documents
product standard.
2
2.1 ASTM Standards: 3.1.5 Lot testing, if required (see 10.3).
A751Test Methods, Practices, and Terminology for Chemi- 3.1.6 Certification, if required (see 14.1).
cal Analysis of Steel Products 3.1.7 ASTM designation and year of issue.
3.1.8 Any special requirements.
3.1.9 For establishment of a part identifying system, see
1
This specification is under the jurisdiction of ASTM Committee F16 on ASME B18.24.
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
3.2 Example—1000 pieces 0.250 − 20 × 0.375 SBHCS lot
Nuts, Rivets and Washers.
Current edition approved Dec. 1, 2018. Published December 2018. Originally tensile test. ASTM F835–XX.
approved in 1986. Last previous edition approved in 2016 as F835–16. DOI:
10.1520/F0835-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. 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 ----------------------
F835−18
TABLE 2 Chemical Requirements
4. Materials and Manufacture
Composition, %
4.1 The screws shall be fabricated from alloy steel made to
Element
Heat Product
fine grain practice. In the event of controversy over grain size,
Analysis Analysis
referee tests on finished screws conducted in accordance with
Test Methods E112 shall prevail.
Carbon 0.30 to 0.48 0.28 to 0.50
Phosphorus, max 0.035 0.040
4.2 Screws shall be hot or cold upset or extruded, or both.
Sulfur, max 0.040
...
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: F835 − 16 F835 − 18
Standard Specification for
Alloy Steel Socket Button and Flat Countersunk Head Cap
1
Screws
This standard is issued under the fixed designation F835; 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 button (SBHCS) 0.060
through 0.625 thread sizes and flat countersunk (SFHCS) 0.060 through 1.5 thread sizes head cap screws having material properties
for high-strength requirements.
1.2 Fasteners meeting this specification are intended for shear-type applications and have tensile requirements ranging from 122
to 150 ksi.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this
standard.
1.4 The hazard statement applies only to the test method section, Section 11, 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 safety, health, and healthenvironmental practices and determine the applicability of regulatory
limitations prior to use.
1.5 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
D3951 Practice for Commercial Packaging
E3 Guide for Preparation of Metallographic Specimens
E18 Test Methods for Rockwell Hardness of Metallic Materials
E112 Test Methods for Determining Average Grain Size
E384 Test Method for Microindentation Hardness of Materials
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
3
2.2 ASME Standards:
B18.3 Socket Cap, Shoulder and Set Screws—Inch Series
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
3. Ordering Information
3.1 Orders for material under this specification shall include the following:
3.1.1 Quantity (number of screws).
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 Dec. 1, 2016Dec. 1, 2018. Published January 2017December 2018. Originally approved in 1986. Last previous edition approved in 20132016
as F835 – 13.F835 – 16. DOI: 10.1520/F0835-16.10.1520/F0835-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
F835 − 18
3.1.2 Dimensions, including nominal thread designation, thread pitch, and nominal screw length (inches). A standard part
number may be used for this definition.
3.1.3 Name of the screw: SBHCS or SFHCS.
3.1.4 Coating, if required. If a protective finish other than black oxide is required, it must be specified on the order or product
standard.
3.1.5 Lot testing, if required (see 10.3).
3.1.6 Certification, if required (see 14.1).
3.1.7 ASTM designation and year of issue.
3.1.8 Any special requirements.
3.1.9 For establishment of a part identifying system, see ASME B18.24.
3.2 Example—1000 pieces 0.250 − 20 × 0.375 SBHCS lot tensile test. ASTM F835–XX.
4. Materials
...
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