ASTM F2403-06

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Designation: F 2403 – 06
Standard Specification for
Inch Series Machine Screws, Carbon Steel, 60 000 psi
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Tensile Strength
This standard is issued under the fixed designation F 2403; 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.
1. Scope* B18.6.4 Thread Forming and Thread Cutting Tapping
Screws and Metallic Drive Screws
1.1 This specification covers the requirements for non-heat
B18.18.2M Inspection and Quality Assurance for High-
treated carbon steel machine screws with nominal diameters of
Volume Machine Assembly Fasteners
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No. 0000 through ⁄4 in. having a minimum ultimate tensile
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2.3 Industrial Fasteners Institute:
strength of 60 000 psi.
IFI–138 Straightness Gaging Method and Straightness Lim-
2. Referenced Documents
its for Machine, Tapping, and Thread Rolling Screws
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2.4 ISO Standards:
2.1 ASTM Standards:
ISO 3269:2000 Fasteners–Acceptance Inspection
A 751 Test Methods, Practices, and Terminology for
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2.5 National Aerospace Standards:
Chemical Analysis of Steel Products
NASM 1312-8 Fastener Test Methods, Method 8, Tensile
D 3951 Practice for Commercial Packaging
Strength
F 606 Test Methods for Determining the Mechanical Prop-
erties of Externally and Internally Threaded Fasteners,
3. Ordering Information
Washers, and Rivets
3.1 Orders for machine screws under this specification shall
F 788/F 788M Specification for Surface Discontinuities of
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include the following (see Note 1):
Bolts, Screws, and Studs, Inch and Metric Series
3.1.1 ASTM specification number and date of issue,
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
3.1.2 Quantity (number of pieces),
cal Properties and Performance Inspection
3.1.3 Head style and drive (ASME B18.6.3),
F 1941 Specification for Electrodeposited Coatings on
3.1.4 Size (nominal diameter, threads per inch and length)
Threaded Fasteners (Unified Inch Screw Threads (UN/
(see 7.3), and
UNR))
3.1.5 Stress relieve anneal, if required (see 4.2).
F 2282 Specification for Quality Assurance Requirements
3.1.6 Finish—Specify protective finish type, if required. If
for Carbon and Alloy Steel Wire, Rods, and Bars for
required, specify applicable coating specification, thickness,
Mechanical Fasteners
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and type.
2.2 ASME Standards:
3.1.7 Certification, if required (Section 11).
B1.1 Unified Screw Threads
3.1.8 Supplementary requirements, if required.
B1.3M Screw Thread Gauging Systems Dimensional Ac-
3.1.9 Other special requirements, if required.
ceptability Inch and Metric Screw Threads—UN UNR
3.1.10 Part Identifying Numbering (PIN) System
UNJMMJ
(optional)—Part Identifying Number will be determined in
B18.6.3 Machine Screws and Machine Screw Nuts
accordance with ASME B18.24, if required.
B18.24 Part Identifying Number (PIN) Code System Stan-
dard for B18 Externally Threaded Fastener Products
NOTE 1—A typical order description follows: ASTM F XXXX – XX,
5000 pieces; Machine Screws: Type I Cross Recessed Flat Countersunk
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Head; ⁄4 20 3 3 UNC-2A; Certifications Required.
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This specification is under the jurisdiction of ASTM Committee F16 on
FastenersandisthedirectresponsibilityofSubcommitteeF16.06onSmallFastener 4. Materials and Manufacture
Products.
4.1 Materials:
Current edition approved May 1, 2006. Published May 2006. Originally
approved in 2005. Last previous edition approved in 2005 as F 2403 – 05.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Industrial Fasteners Institute (IFI), 1717 East 9th Street, Suite
Standards volume information, refer to the standard’s Document Summary page on 1105, Cleveland, OH 44114-2879.
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the ASTM website. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
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Withdrawn. 4th Floor, New York, NY 10036.
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Available from American Society of Mechanical Engineers (ASME), ASME AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
International Headquarters, Three Park Ave., New York, NY 10016-5990. 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.
*A Summary of Changes section appears at the end of this standard.
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F2403–06
TABLE 2 Tensile Load Requirements For Machine Screws
4.1.1 Steel for machine screws shall be made by the
open-hearth, basic-oxygen, or electric-furnace process. Nominal Size or
A
Basic Major Diameter Stress Area, Tensile Strength,
4.1.2 Unless otherwise specified, Specification F 228
...