ASTM F912-04

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Designation: F 912 – 04
Standard Specification for
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Alloy Steel Socket Set Screws
This standard is issued under the fixed designation F 912; 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* B18.3 Socket Cap, Shoulder and Set Screw, Inch Series
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B18.24.1 Part Identifying Number (PIN) Code System
1.1 This specification covers the requirements for quenched
andtemperedalloysteelsocket-setscrews(SSS)0.060through
3. Ordering Information
2.000-in. sizes having hardnesses 45 to 53 HRC.
3.1 Orders for material under this specification shall include
1.2 These set screws are intended for compression applica-
the following information:
tions only and are not customarily subjected to embrittlement
3.1.1 Quantity (number of screws).
tests. For tensile applications, consult with the manufacturer
3.1.2 Dimensions, including nominal thread designation,
for proper alloy and hardness.
threads per inch, nominal screw length (inches) and point
1.3 The hazard statement pertains only to the test method
configuration. A standard part number may be used for this
section, Section 11 of this specification. This standard does not
definition.
purport to address all of the safety concerns, if any, associated
3.1.3 Name of the screw (SSS).
with its use. It is the responsibility of the user of this standard
3.1.4 Coating, if required. See 4.4.
to establish appropriate safety and health practices and
3.1.5 Lot testing, if required. See 10.3.
determine the applicability of regulatory limitations prior to
3.1.6 Certification, if required. See 14.1.
use.
3.1.7 ASTM designation and year of issue.
NOTE 1—AcompletemetriccompaniontoSpecificationF 912hasbeen
3.1.8 Any special or supplemental requirements.
developed—F 912M; therefore, no metric equivalents are shown in this
3.1.9 For establishment of a part identifying system, see
Specification.
ASME B18.24.1.
2. Referenced Documents
4. Materials and Manufacture
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2.1 ASTM Standards:
4.1 The screws shall be fabricated from alloy steel made to
A 751 Test Methods, Practices, and Terminology for
fine grain practice. In the event of controversy over grain size,
Chemical Analysis of Steel Products
referee tests on finished screws conducted in accordance with
D 3951 Practice for Commercial Packaging
Test Methods E 112 shall prevail.
E 3 Practice for Preparation of Metallographic Specimens
4.2 The screws may be forged, formed, extruded, machined,
E 18 Test Methods for Rockwell Hardness and Rockwell
or ground to meet the dimensional characteristics and perfor-
Superficial Hardness of Metallic Materials
mance requirements.
E 112 Test Methods for Determining Average Grain Size
4.3 Setscrewsshallbeheattreatedbyquenchinginoilfrom
E 384 Test Method for Microhardness of Materials
above the transformation temperature and then tempered by
F 788/F 788M Specification for Surface Discontinuities of
reheating to meet the hardness range specified in 6.2.
Bolts, Screws, and Studs, Inch and Metric Series
4.4 Standard Finishes—Unless otherwise specified, the
2.2 ANSI/ASME Standards:
screws shall be furnished with one of the following standard
surfacesasmanufactured,attheoptionofthemanufacturer;(1)
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bright uncoated; (2) thermal black oxide; or (3) chemical black
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
oxide. Hydrogen embrittlement tests shall not be required for
Nuts, Rivets, and Washers.
screws furnished in these conditions.
Current edition approved Aug. 1, 2004. Published August 2004. Originally
approved in 1986. Last previous edition approved in 2000 as F 912 – 00.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or 3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4th Floor, New York, NY 10036.
Standards volume information, refer to the standard’s Document Summary page on 4
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.
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F912–04
4.5 Protective Coatings: 9. Workmanship, Finish, and Appearance
4.5.1 When a protective finish other than as specified in 4.4
9.
...