ASTM F879M-01

Designation: F 879 – 01
Standard Specification for
Stainless Steel Socket Button and Flat Countersunk Head
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Cap Screws
This standard is issued under the fixed designation F 879; 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
E 353 Test Methods for Chemical Analysis of Stainless,
1.1 This specification covers the chemical and mechanical
Heat-Resisting, Maraging, and Other Similar Chromium-
requirements for stainless steel inch hexagon socket button
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Nickel-Iron Alloys
(SBHCS) and flat countersunk (SFHCS) head cap screws with
F 593 Specification for Stainless Steel Bolts, Hex Cap,
nominal thread 0.060 through 0.625 in. intended for use in
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Screws, and Studs
applications requiring general corrosion resistance.
F 606 Test Methods for Determining the Mechanical Prop-
1.2 The following two conditions are covered:
erties of Externally and Internally Threaded Fasteners,
1.2.1 AusteniticalloyconditionAFinanannealedcondition
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Washers, and Rivets
at 85 ksi maximum and
F 788/F788M Specification for Surface Discontinuities of
1.2.2 Austenitic alloy condition CW in a cold-worked
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Bolts, Screws and Studs, Inch and Metric Series
condition at 95 ksi minimum.
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
1.3 The following precautionary caveat pertains only to the
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cal Properties and Performance Inspection
test method portion, Section 12, of this specification: This
2.2 ASME Standard:
standard does not purport to address all of the safety concerns,
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B 18.3 Socket Cap, Shoulder and Set Screws (Inch Series)
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
3. Classification
practices and determine the applicability of regulatory limita-
3.1 The designation of the alloy group and condition of this
tions prior to use.
specification shall be consistent with the stainless steel desig-
2. Referenced Documents nations in Specification F 593.
3.2 The austenitic stainless steel socket screw shall be
2.1 ASTM Standards:
designated F 879 Group 1 Condition AF or F 879 Group 1
A 262 Practices for Detecting Susceptibility to Intergranu-
2
Condition CW.
lar Attack in Austenitic Stainless Steels
A 342 Test Methods for Permeability of Feebly Magnetic
4. Ordering Information
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Materials
4.1 Orders for material under this specification shall include
A 380 Practice for Cleaning and Descaling Stainless Steel
2 the following information:
Parts, Equipment, and Systems
4.1.1 Quantity (number of pieces of each item).
A 555/A555M Specification for General Requirements for
2 4.1.2 Name of the screw, SBHCS or SFHCS.
Stainless and Heat-Resisting Steel Wire and Wire Rods
4.1.3 Dimensions, including nominal thread designation,
A 751 Test Methods, Practices, and Terminology for
2 thread pitch, and nominal screw length (inches). A standard
Chemical Analysis of Steel Products
part number may be used for this definition.
A 967 Specification for Chemical Passivation Treatments
2 4.1.4 Alloy group, and condition (Group 1 AF or Group 1
for Stainless Steel Parts
CW).
4.1.5 Certification, if required (see Section 15).
4.1.6 ASTM specification and year of issue.
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This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.04 on Nonferrous
Fasteners.
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Current edition approved Oct. 10, 2001. Published November 2001. Originally Annual Book of ASTM Standards, Vol 15.09.
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published as F 879 – 86. Last previous edition F 879 – 98. Annual Book of ASTM Standards, Vol 03.05.
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Annual Book of ASTM Standards, Vol 01.03. Annual Book of ASTM Standards, Vol 01.08.
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Annual Book of ASTM Standards, Vol 03.04. Available from Global Engineering Documents, 15 Inverness Way East,
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 879–01
4.1.7 Any special or supplemental requirements (see not be subject to tension tests, but shall conform to the
Supplementary Requirements S1 through S6). maximum and minimum hardness requirements of Table 1.
5. Materials and Manufacture 8. Corrosion Resistance Requirements
5.1 Screws shall be formed by upsetting or extruding, or 8.1 Carbide Precipitation:
both. 8.1.1 Rod, bar, and wire in the austenitic alloy group 1 used
5.2 Screws shall be roll threaded. to make fasteners in accordance with this specification shall be
5.3 Heat Treatment—Austenitic alloys Condition AF capable of passing the test for susceptibility to intergranular
screws, following manufacture, shall be ann
...