1、Designation: F 2403 06Standard Specification forInch Series Machine Screws, Carbon Steel, 60 000 psiTensile Strength1This standard is issued under the fixed designation F 2403; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers the requirements for non-heattreated carbon steel machine screws with nominal diamet
3、ers ofNo. 0000 through34 in. having a minimum ultimate tensilestrength of 60 000 psi.2. Referenced Documents2.1 ASTM Standards:2A 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsD 3951 Practice for Commercial PackagingF 606 Test Methods for Determining the Mechanic
4、al Prop-erties of Externally and Internally Threaded Fasteners,Washers, and RivetsF 788/F 788M Specification for Surface Discontinuities ofBolts, Screws, and Studs, Inch and Metric Series3F 1470 Guide for Fastener Sampling for Specified Mechani-cal Properties and Performance InspectionF 1941 Specifi
5、cation for Electrodeposited Coatings onThreaded Fasteners (Unified Inch Screw Threads (UN/UNR)F 2282 Specification for Quality Assurance Requirementsfor Carbon and Alloy Steel Wire, Rods, and Bars forMechanical Fasteners2.2 ASME Standards:4B1.1 Unified Screw ThreadsB1.3M Screw Thread Gauging Systems
6、 Dimensional Ac-ceptability Inch and Metric Screw ThreadsUN UNRUNJMMJB18.6.3 Machine Screws and Machine Screw NutsB18.24 Part Identifying Number (PIN) Code System Stan-dard for B18 Externally Threaded Fastener ProductsB18.6.4 Thread Forming and Thread Cutting TappingScrews and Metallic Drive ScrewsB
7、18.18.2M Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners2.3 Industrial Fasteners Institute:5IFI138 Straightness Gaging Method and Straightness Lim-its for Machine, Tapping, and Thread Rolling Screws2.4 ISO Standards:6ISO 3269:2000 FastenersAcceptance Inspection2.5 Nationa
8、l Aerospace Standards:7NASM 1312-8 Fastener Test Methods, Method 8, TensileStrength3. Ordering Information3.1 Orders for machine screws under this specification shallinclude the following (see Note 1):3.1.1 ASTM specification number and date of issue,3.1.2 Quantity (number of pieces),3.1.3 Head styl
9、e and drive (ASME B18.6.3),3.1.4 Size (nominal diameter, threads per inch and length)(see 7.3), and3.1.5 Stress relieve anneal, if required (see 4.2).3.1.6 FinishSpecify protective finish type, if required. Ifrequired, specify applicable coating specification, thickness,and type.3.1.7 Certification,
10、 if required (Section 11).3.1.8 Supplementary requirements, if required.3.1.9 Other special requirements, if required.3.1.10 Part Identifying Numbering (PIN) System(optional)Part Identifying Number will be determined inaccordance with ASME B18.24, if required.NOTE 1A typical order description follow
11、s: ASTM F XXXX XX,5000 pieces; Machine Screws: Type I Cross Recessed Flat CountersunkHead;14 20 3 3 UNC-2A; Certifications Required.4. Materials and Manufacture4.1 Materials:1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommitt
12、ee F16.06 on Small FastenerProducts.Current edition approved May 1, 2006. Published May 2006. Originallyapproved in 2005. Last previous edition approved in 2005 as F 2403 05.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
13、Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.5Available from Industrial Fasteners I
14、nstitute (IFI), 1717 East 9th Street, Suite1105, Cleveland, OH 44114-2879.6Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.7Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Was
15、hington, DC 20401.1*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.4.1.1 Steel for machine screws shall be made by theopen-hearth, basic-oxygen, or electric-furnace pro
16、cess.4.1.2 Unless otherwise specified, Specification F 2282 shallbe used for procurement control of the material used tomanufacture machine screws, except chemical compositionshall be as specified in Section 5.4.2 Manufacture:4.2.1 Unless otherwise specified, the method of manufac-ture shall be cold
17、 forming.4.2.2 Machine screw threads shall be rolled.4.2.3 When specified by the purchaser, machine screwsshall be stress relieve annealed.5. Chemical Composition5.1 Machine screws shall have a heat analysis conformingto the requirements specified in Table 1.5.2 The IFI Steel Grade Designations spec
18、ified in the tabletitled Carbon Steels, Chemical Ranges and Limits, % ofSpecification F 2282 are suitable grades, providing the carboncontent shall not exceed 0.29 %.5.3 Product analyses shall be permitted to be conducted onfinished screws in each lot. The composition thus determinedshall not vary f
19、rom the heat analysis by more than theallowable limits in the table titled Permissible Variations fromSpecified Chemical Ranges, and Limits for Carbon Steel ofSpecification F 2282.5.4 In case of conflict or for referee purposes, the productanalysis shall take precedence.5.5 Screws are customarily fu
20、rnished from stock, in whichcase individual heats of steel cannot be identified.6. Mechanical Properties6.1 Tensile:6.1.1 Machine screws shall have a tensile strength of 60 000psi minimum.6.1.2 The machine screws shall meet the tensile load re-quirements in Table 2 when tested in accordance with 10.
21、2using the method below.Tensile Test RequirementsHead StyleNominal Size Length Hex Other thanHexNo. 0 and smaller Shorter than 3DANot requiredBNot requiredBLarger than No. 0 Shorter than 3DANot requiredBNot requiredBNo.1 to No. 5 incl. 3D and longer Axial AxialNo. 6 and larger 3D and longer Wedge Ax
22、ialAD denotes the nominal diameter.BUse Hardness, see 6.26.1.3 Tensile testing is not required unless SupplementaryRequirement S1 is specified in the inquiry and order, or asstated in 6.1.2.6.2 Hardness:6.2.1 Machine screws subjected to tensile testing in accor-dance with 6.1.1 shall have a Rockwell
23、 Hardness of HRB 100maximum.6.2.2 Screws that are exempted from tensile testing inaccordance with 6.1.2 shall have a Rockwell Hardness of HRB70 to HRB 100.6.3 DuctilityDuctility testing is not required unlessSupplementary Requirement S34 is specified in the inquiry andorder.7. Dimensions7.1 Unless o
24、therwise specified, the dimensions shall be inaccordance with the requirements of ASME B18.6.3.7.2 GaugingUnless otherwise specified, screw threadsshall be gauged in accordance with ASME B1.3M, System 21.7.3 Unless otherwise specified, threads prior to plating shallbe Unified Coarse Thread Series as
25、 specified in the latest issueof ASME B1.1 for sizes #0 through34 in., and shall have Class2A thread tolerances. Thread sizes smaller than #0 shallcomply with the dimensions in the Appendix of ASMEB18.6.3.TABLE 1 Chemical Composition RequirementsChemical Element Heat AnalysisCarbon, max., % 0.29Phos
26、phorous, max., % 0.035Sulfur, max., % 0.040TABLE 2 Tensile Load Requirements For Machine ScrewsNominal Size orBasic Major Diameterof Thread andThreads per in.Stress Area,in.2Tensile Strength,Alb, minNo. 0000-160 0.021 . . . . . .000-120 0.034 . . . . . .00-90 0.047 . . . . . .00-96 0.047 . . . . . .
27、0-80 0.060 . . . . . .1-64 0.073 0.00263 160No. 1-72 0.073 0.00278 1702-56 0.086 0.00370 2202-64 0.086 0.00394 2403-48 0.099 0.00487 2903-56 0.099 0.00523 310No. 4-40 0.112 0.00604 3604-48 0.112 0.00661 3905-40 0.125 0.00796 4705-44 0.125 0.00830 4906-32 0.138 0.00909 5506-40 0.138 0.01015 6008-32 0
28、.164 0.0140 8508-36 0.164 0.01474 88010-24 0.190 0.0175 105010-32 0.190 0.0200 120012-24 0.216 0.0242 1450No. 12-28 0.216 0.0258 155014-20 0.250 0.0318 190014-28 0.250 0.0364 2200516-18 0.312 0.0524 3150516-24 0.312 0.0580 350038-16 0.375 0.0775 465038-24 0.375 0.0878 5250716-14 0.438 0.1063 6400716
29、-20 0.438 0.1187 710012-13 0.500 0.1419 850012-20 0.500 0.1599 9600916-12 0.562 0.182 10 900916-18 0.562 0.203 12 20058-11 0.625 0.226 13 60058-18 0.625 0.256 15 40034-10 0.750 0.334 20 10034-16 0.750 0.373 22 400ATensile strength is based on 60 000 psi.F24030627.4 Coated or Plated ProductUnless oth
30、erwise specified,coated and plated threads shall conform with the latest issue ofASME B1.1 and be within the limits of Class 3Ahigh limit (3AGO) and the lower limit of Class 2A (2A NOGO).7.5 StraightnessUnless otherwise specified, the straight-ness shall be in accordance with the requirements of IFI
31、-138.8. Workmanship, Finish and Appearance8.1 WorkmanshipSurface discontinuities for machinescrews with nominal diameters of No. 5 and larger shallconform to the limits of Specification F 788/ F 788M.8.2 FinishUnless otherwise specified, the machine screwsshall be supplied with a natural (as process
32、ed) finish, unplatedor uncoated.8.3 When electrodeposited coatings are specified, they shallbe in accordance with Specification F 1941.9. Number of Tests9.1 ChemicalSampling for chemical analyses shall be inaccordance with Guide F 1470.9.2 MechanicalSample size shall conform to GuideF 1470 when lot
33、control is applied, or to ISO 3269 whenshipping lots are applied.9.3 DimensionsSampling for dimensional complianceshall be in accordance with ASME B18.18.2M, unless other-wise specified in the referenced dimensional standard.9.4 When tests of individual lots are required prior toshipment, Supplement
34、ary Requirement S2 shall be specified inthe inquiry and order.9.5 The requirements of this specification shall be met incontinuous mass production for stock, and the manufacturershall make sample inspections to ensure that the productconforms to the specified requirements. Additional tests ofindivid
35、ual shipments of material are not ordinarily contem-plated.10. Test Methods10.1 ChemicalChemical analyses shall be performed inaccordance with Test Methods, Practices, and TerminologyA 751.10.2 TensileSizes No. 6 and larger shall be tension testedin accordance with Test Methods F 606 and sizes small
36、er thanSizes No. 6 in accordance with NASM 1312, Test Number 8.10.3 DuctilityDuctility testing shall be tested in accor-dance with the section on Ductility Test of ASME B18.6.4.10.4 HardnessHardness tests shall be conducted in accor-dance with Test Methods F 606. For screws smaller than No.10 size,
37、a referee test may be made at mid-radius usingmicrohardness measurement techniques.11. Certification and Test Reports11.1 Certification shall not be required unless specificallyrequested in the purchase document. When specified in thepurchase order, a producer certification shall be furnished tothe
38、purchaser, stating that the fastener was manufactured,sampled, tested, and inspected in accordance with this speci-fication and meets all of its requirements.12. Responsibility12.1 The party responsible for the machine screws shall bethe organization that supplies the machine screws to thepurchaser.
39、13. Product Marking13.1 Individual hex and hex washer head machine screwswith nominal diameter No. 6 and up to including34 in. shall bemarked with the manufacturers identification marking. At thediscretion of the manufacturer, other machine screw headstyles can be marked with the manufacturers ident
40、ificationmarking.14. Packing and Package Marking14.1 Packaging:14.1.1 Unless otherwise specified, packaging shall be inaccordance with Practice D 3951.14.1.2 When the purchaser requires special packing require-ments, they shall be defined at the time of inquiry and order.14.2 Package Marking:14.2.1
41、Each shipping container shall include or plainly bemarked with the following information:14.2.1.1 ASTM specification and date,14.2.1.2 Nominal diameter and length, product name, andhead and drive style,14.2.1.3 Name and brand or trademark of the manufacturer,14.2.1.4 Number of pieces,14.2.1.5 Purcha
42、se order number, and14.2.1.6 Country of origin.15. Keywords15.1 carbon steel; machine screwsF2403063SUPPLEMENTARY REQUIREMENTSOne or more of the following supplementary requirements shall apply only when specified by thepurchaser in the inquiry and order (see 3.1.8). Supplemental requirements shall
43、in no way negate anyrequirement of the specification itself.S1. Tensile TestingS1.1 When specified on the inquiry or purchase order,tensile testing shall be performed on each lot (manufacturing orshipping) of machine screws except those specified in 6.1.2.Tensile testing shall be performed and meet
44、the requirements of6.1, 9.2 and 10.2.S2. InspectionS2.1 When specified on the inquiry or purchase order,machine screw shall be subject to inspection by the purchaserat the place of manufacture. This will take place prior toshipment. The manufacturer shall afford the purchasers rep-resentative all re
45、asonable facilities to satisfy him that themachine screws are being furnished in accordance with thisspecification.S3. DuctilityS3.1 When specified on the inquiry or purchase order,ductility testing shall be performed on each lot (manufacturingor shipping) of machine screws. Ductility testing shall
46、beperformed and meet the requirements of 9.2 and 10.3.SUMMARY OF CHANGESCommittee F16 has identified the location of selected changes to this standard since the last issue, F 2403 05,that may impact the use of this standard. (Approved May 1, 2006.)(1) Added sizes #0 through34 in. for ASME B1.1 and a
47、ddedASME B18.6.3 for sizes smaller than #0.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and
48、the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision
49、 of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints
