ASTM F879M-02a

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

SCOPE
1.1 This specification covers the chemical and mechanical requirements for stainless steel metric hexagon socket button (SBHCS) and flat countersunk (SFHCS) head cap screws with nominal thread M 3 through M 20 intended for use in applications requiring general corrosion resistance.
1.2 The following three property classes are covered:
1.2.1 Austenitic Class A 1-50 in an annealed condition at 585 MPa maximum,
1.2.2 Austenitic Class A1-55 in a cold worked condition at 550 MPa minimum, and
1.2.3 Austenitic Class A 1-70 in a cold-worked condition at 700 MPa minimum.
1.3 The following hazard caveat pertains only to Section 12, Test Methods:  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: 09-Oct-2002
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.04 - Nonferrous Fasteners

Relations

• Replaces: ASTM F879M-02 - Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws [Metric]
• Effective Date: 10-Oct-2002
• Replaced By: ASTM F879M-02a(2008) - Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws (Metric)
• Effective Date: 01-May-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 879M – 02a
Standard Specification for
Stainless Steel Socket Button and Flat Countersunk Head
1
Cap Screws (Metric)
This standard is issued under the fixed designation F 879M; 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.
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1. Scope D 3951 Practice for Commercial Packaging
E18 Test Methods for Rockwell Hardness and Rockwell
1.1 This specification covers the chemical and mechanical
5
Superficial Hardness of Metallic Materials
requirements for stainless steel metric hexagon socket button
E92 Test Method for Vickers Hardness of Metallic Mate-
(SBHCS) and flat countersunk (SFHCS) head cap screws with
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rials
nominal thread M 3 through M 20 intended for use in applica-
5
E 384 Test Method for Microhardness of Materials
tions requiring general corrosion resistance.
F 606M Test Methods for Determining the Mechanical
1.2 The following three property classes are covered:
Properties of Externally and InternallyThreaded Fasteners,
1.2.1 Austenitic Class A 1-50 in an annealed condition at
6
Washers, and Rivets [Metric]
585 MPa maximum,
F 738M Specification for Stainless Steel Metric Bolts,
1.2.2 Austenitic Class A1–55 in a cold worked condition at
6
Screws, and Studs
550 MPa minimum, and
F 788/F788M Specification for Surface Discontinuities of
1.2.3 Austenitic ClassA 1-70 in a cold-worked condition at
6
Bolts, Screws, and Studs, Inch and Metric Series
700 MPa minimum.
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
1.3 ThefollowinghazardcaveatpertainsonlytoSection12,
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cal Properties and Performance Inspection
Test Methods: This standard does not purport to address all of
2.2 ASME Standards:
the safety problems, if any, associated with its use. It is the
B 18.3.4M Hexagon Socket Button Head Cap Screws (Met-
responsibility of the user of this standard to establish appro-
7
ric Series)
priate safety and health practices and determine the applica-
B 18.3.5M Hexagon Socket Flat Countersunk Head Cap
bility of regulatory limitations prior to use.
7
Screws (Metric Series)
2. Referenced Documents
3. Classification
2.1 ASTM Standards:
3.1 The designation of the property class and conditions of
A 262 Practices for Detecting Susceptibility to Intergranu-
2 this specification shall be consistent with the stainless steel
lar Attack in Austenitic Stainless Steels
designations in Specification F 738M.
A 342 Test Methods for Permeability of Feebly Magnetic
3 3.2 The austenitic stainless steel socket screw shall be
Materials
designated F879M A1-50, F879M A1–55, or F 879M A1-70.
A 380 Practice for Cleaning, Descaling, and Passivation of
2
Stainless Steel Parts, Equipment, and Systems
4. Ordering Information
A 555/A555M Specification for General Requirements for
2 4.1 Orders for material under this specification shall include
Stainless Steel Wire and Wire Rods
the following information:
A 751 Test Methods, Practices, and Terminology for
2
4.1.1 Quantity (number of pieces of each item).
Chemical Analysis of Steel Products
4.1.2 Name of the screw, SBHCS or SFHCS.
A 967 Specification for Chemical Passivation Treatments
2
4.1.3 Dimensions, including nominal thread designation,
for Stainless Steel Parts
thread pitch, and nominal screw length (millimetres). A stan-
dard part number may be used for this definition.
1
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.04 on Nonferrous
4
Fasteners. Annual Book of ASTM Standards, Vol 15.09.
5
Current edition approved Oct. 10, 2001. Published November 2002. Originally Annual Book of ASTM Standards, Vol 03.01.
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published as F 879 – 84. Last previous edition F 879 – 02. Annual Book of ASTM Standards, Vol 01.08.
2 7
Annual Book of ASTM Standards, Vol 01.03. Available from Global Engineering Documents, 15 Inverness Way East,
3
Annual Book of ASTM Standards, Vol 03.04. Englewood, CO 80112.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F 879M – 02a
4.1.4 Property Class A 1-50, A1–55, or A 1-70. 7.2 Screws having a nominal length equal to or greater than
4.1.5 Certification, if required (see Section 15). three diameters shall be tensile tested full size and shall meet
4.1.6 ASTM specification and year of issue. the full size breaking strength requirements specified in Table
4.1.7 Any special or supplemental requirements (see 3. Tensile failures through the head are acceptable providing
Supplementary Req
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