1、Designation: C954 18Standard Specification forSteel Drill Screws for the Application of Gypsum PanelProducts or Metal Plaster Bases to Steel Studs from 0.033in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness1This standard is issued under the fixed designation C954; the number immediately following th
2、e designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for
3、use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification covers minimum requirements forsteel drill screws for use in fastening gypsum panel products ormetal plaster bases to steel members from 0.033 in. (0.84 mm)to 0.112 in. (2.84 mm) in thickness.1.2 This specification als
4、o covers physical properties andtest methods for determining performance requirements.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard
5、.1.4 The following safety hazards caveat pertains only to thetest methods described in this specification. This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and hea
6、lth practicesand determine the applicability of regulatory limitations priorto use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guid
7、es and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A510/A510M Specification for General Requirements forWire Rods and Coarse Round Wire, Carbon Steel, andAlloy SteelA1040 Guide for Specifying Harmonized
8、 Standard GradeCompositions for Wrought Carbon, Low-Alloy, and AlloySteelsC11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC847 Specification for Metal LathC955 Specification for Cold-Formed Steel Structural Fram-ing MembersC1396/C1396M Specification for Gypsum BoardC1513
9、Specification for Steel Tapping Screws for Cold-Formed Steel Framing Connections3. Terminology3.1 Definitions:3.1.1 For definitions relating to gypsum and related buildingmaterials and systems, see Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 steel drill screw, nself-dril
10、ling tapping screw withthe ability to drill its own hole, form or cut mating threadswithout deforming its own threads or breaking during assem-bly.4. Materials4.1 Screws shall be made from steel wire manufactured inaccordance with Specification A510/A510M.4.1.1 Chemical composition shall be in accor
11、dance withGuide A1040, Grade 1018 to 1022.5. Physical Properties5.1 Metallurgical Requirements:5.1.1 The surface of the screw shall be carbonitrided to adepth of 0.004 to 0.008 in. (0.10 to 0.20 mm).5.1.2 The core hardness shall be 32 to 40 HRC after beingdrawn at a minimum temperature of 625F (330C
12、).5.1.3 The screw shall have no band of free ferrite betweenthe case and core nor shall the case contain appreciableamounts of retained austenite or other soft constituents.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is
13、the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved April 1, 2018. Published April 2018. Originallyapproved in 1981. Last previous edition approved in 2015 as C954 15. DOI:10.1520/C0954-18.2For referenced AST
14、M standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM
15、International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standa
16、rds, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.1.4 Surface hardness shall be determined by a microhardness instrument at “the root of the thread profile,” asexposed by removal of enough material to form a flat surfacealong the le
17、ngth of the screw.5.1.5 DuctilityScrews shall have sufficient ductility to beable to withstand a 5 bend without visible signs of fracturewhen tested as specified in paragraph 8.2.1 of SpecificationC1513.5.2 Dimensions and Permissible Variations:5.2.1 General:5.2.1.1 Head Diameter The head of the scr
18、ew shall not beout of round more than 0.021 in. (0.51 mm) and have thefollowing shape and dimensions:5.2.1.2 Screw Diameter Screws shall have a major diam-eter not less than 0.136 in. (3.45 mm).5.2.1.3 Points, shall provide for self-drilling into steel studsfrom 0.333 in. (0.84 mm) to 0.112 in. (2.8
19、4 mm) in thicknessand meet the performance tests in Section 6.5.2.1.4 Driving Recess, shall be a No. 2 “Phillips” designwith a minimum depth of 0.104 in. (2.64 mm) as determinedwith a “Phillips” penetration depth gage or a recess of equalperformance.5.2.1.5 LengthNominal lengths shall be minimum len
20、gth.5.2.2 Screws for Fastening Gypsum Board:5.2.2.1 Screw-head minimum diameter shall be 0.3145 in.(8.00 mm).5.2.2.2 The top of the head shall be flat. The outer flangethickness shall be 0.025 6 0.005 in. (0.64 6 0.13 mm). Thecontour beneath the flange head shall be such that the screwhead shall be
21、able to be driven so that the head of the screwrests immediately below the surface of the gypsum panelproducts.5.2.2.3 For screws less than 112 in. (38 mm) overall length,the threads shall extend to the lower edge of the head contour.5.2.3 Screws for Fastening Metal Plaster Bases:5.2.3.1 Screw head
22、minimum diameter shall be 0.437 in.(11.1 mm).5.2.3.2 The top of the head shall be flat or contoured. Theunderside of the head shall be flat.5.2.3.3 The threads shall extend to the underside of thehead.6. Performance Requirements6.1 Spin-Out:6.1.1 Screws shall self-drill and drive into a stud 0.0538
23、in.(1.4 mm) thick with an approximate hardness of 65 HRBwithout spin-out.6.1.2 Screws shall self drill and drive into a stud 0.0966 in.(2.5 mm) thick, with a hardness of 80 HRB without spin-out.6.2 Performance:6.2.1 When tested in accordance with Section 10 and 11,screws shall meet the requirements
24、as follows:6.2.1.1 Gypsum Panel ProductsWhen tested in accor-dance with Section 11, screw threads shall be capable ofpulling the head of the screw below the surface of the gypsumboard6.2.1.2 Metal Plaster BasesWhen tested in accordancewith Section 10, screw threads shall be adequate to pull metallat
25、h tight against the flange of a steel stud 0.033 in. (0.84 mm)thick so that when subjected to a steady pull, the lath will tearand not slip out from under the screw head when tested inaccordance with 10.5.1.7. Finish and Appearance7.1 Screws shall be corrosion-resistant treated with a mate-rial whic
26、h will not inhibit adhesion to joint compounds orplaster and will not bleed through decorative finishes.7.2 Screws shall be straight, clean, smooth, neatly formed,and free of defects such as burrs and deformations.8. Sampling8.1 Obtain not less than 90 screws from not less than fivecontainers.9. Num
27、ber of Tests and Retests9.1 Test a minimum of five screws for each test. If any of thefirst lot fails, test 25 more screws.9.2 If two or more of the second lot fail the second test, thenthe represented lot fails to meet the specified requirements.10. Metal Lath Test Method10.1 Summary of Test Method
28、:10.1.1 This test method utilizes steel screws designed foruse to hold metal plaster base materials applied with power-driven screw guns of 2500 rpm maximum to steel studs.10.2 Significance and Use:10.2.1 This test method evaluates the ability of steel drillscrews used to secure metal plaster bases
29、to certain steelframing members.10.2.2 The test shall be conducted in a laboratory or on-site.10.3 Apparatus:10.3.1 Power-Driven Drill Screw Gun, capable of 2500 rpm(free spindle speed) with a depth-sensitive nose piece, suppliedwith a screw driving bit to fit the screw used in the test.10.3.2 Vice,
30、 or similar device, to support the stud during thetest.10.3.3 ClampLocking pliers (for example, Vise-Grips),6 in. (152 mm).10.4 Materials:10.4.1 Steel StudSpecification C955, one section of0.033-in. thick stud (0.84 mm).10.4.2 Gypsum Wallboard Specification C1396/C1396M,Type X,58 in. (16 mm) thick.1
31、0.4.3 Screw Specimens, to be tested.10.4.4 Diamond Mesh Metal Lath, Specification C847,diamond mesh, weight 2.5 lb/yd2(1.4 kg/m2).10.5 Procedure for Performance Tests:10.5.1 Using the screw specimen, attach metal lath to centerof a flange of a steel stud which has been securely and rigidlysupported.
32、10.5.1.1 Grasp the metal lath with locking pliers and pullsteadily in a plane parallel to the plane of the lath. Observewhether the lath tears before it slips out from under the screwhead.C954 18210.6 Precision and BiasNo statement is made regardingthe precision and bias of this test method, since t
33、he result of thetest method is reported in nonnumerical terms.11. Penetration Test Method11.1 Significance and UseThis test method provides aprocedure for evaluating the ability of steel drill screws to pullthe head of a screw below the surface of gypsum wallboard. Itshall be used to determine compl
34、iance with this specification.The degree of performance of this test method with serviceperformance has not been determined.11.2 ApparatusApparatus shall satisfy the following:11.2.1 Power-Driven Drill Screw Gun, capable of 2500 rpm(free spindle speed) with a depth-sensitive nose piece, suppliedwith
35、 a screw driving bit to fit the screw used in the test.11.3 MaterialsMaterials shall satisfy the following:11.3.1 Gypsum WallboardSpecification C1396/C1396M,Type X,58 in. (16 mm) thick.11.3.2 Steel StudSpecification C955, one section of 0.033-in. thick stud (0.84 mm), one section of 0.0538-in. (1.4
36、mm)thick stud with an approximate hardness of 65 HRB, onesection of 0.0966 in. (2.5 mm) thick stud, with an approximatehardness of 80 HRB.11.4 SamplingAs in Section 8.11.5 Specimen Preparation:11.5.1 Each steel stud shall be cut into test specimens notless than 18 in. (460 mm) long.11.5.2 For each t
37、est, one piece of gypsum wallboard, 6 in.(150 mm) square, shall be cut from not less than 12 in.(300 mm) from the edge or end of the gypsum wallboard.11.6 Procedure:11.6.1 Assemble the steel stud and gypsum wallboard on arigid, flat surface.11.6.2 Prior to performing the test, drive several screws t
38、oset the depth of the nose piece on the screw gun, allowing thescrews to be driven below the surface of the wallboard withoutbreaking the gypsum wallboard face paper.11.6.3 Drive the screw using the screw gun, while applyinga force (dead weight and applied force) of 30 lbf (112.2 N).Drive the screw
39、to below the surface of the gypsum wallboard.Record if the screw has spun out and if the head of the screwwas pulled below the surface of the gypsum wallboard.11.7 Number of Tests and Retests:11.7.1 Five specimens of members shall be tested.11.7.2 If more than one test specimen fails to meet therequ
40、irements, two more test specimens shall be chosen forretesting.11.8 ReportReport shall indicate all specimens meetingthe requirements of this specification if the screw did not spinout; or shall indicate all failing if the screw spun out.11.9 Precision and BiasNo statement is made about eitherthe pr
41、ecision or bias of this test method since the result merelystates whether or not there is conformance to the criteria forsuccess specified in the procedure.12. Inspection12.1 Inspection of steel drill screws shall be agreed upon bythe purchaser and the producer or supplier as part of thepurchase agr
42、eement.13. Rejection and Rehearing13.1 Rejection of steel drill screws that fail to conform tothe requirements of this specification shall be reported to theproducer or supplier promptly and in writing within tenworking days from receipt of shipment by the purchaser.Notice of rejection shall contain
43、 a specific statement as to therespects in which the screws have failed to conform to therequirements of this specification. In case of dissatisfactionwith the results of the test, and at the request of the producer orsupplier, such notice of rehearing shall be supported by resultsof a test conducte
44、d by a mutually agreeable independentlaboratory.14. Certification14.1 When specified in the purchase agreement, the pro-ducer or supplier shall furnish a report certifying that, at timeof shipment, the screws were in compliance with the require-ments of this specification.15. Packaging and Marking15
45、.1 Screws shall be packaged in substantial commercialcontainers constructed so as to preserve the contents in goodcondition and to ensure acceptance and safe delivery bycommon or other carriers, at the lowest rate, to the point ofdelivery.15.2 The containers shall be so constructed that the contents
46、can be partially removed without destroying the containersability to serve as a receptacle for the remainder of thecontents.15.3 Individual packages and shipping containers shall bemarked with the type and length of screw and the name of themanufacturer or distributor.16. Keywords16.1 steel drill sc
47、rew; steel self-drilling tapping screwC954 183SUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this standard since the last issue (C954 15)that may impact the use of this standard. (Approved April 1, 2018.)(1) Revised 4.1 and added new 4.1.1.(2) Added Guide A1040 to
48、 Section 2 (“Referenced Docu-ments”).Committee C11 has identified the location of selected changes to this standard since the last issue (C954 11)that may impact the use of this standard. (June 1, 2015.)(1) Revised subsection 5.2.2.3.ASTM International takes no position respecting the validity of an
49、y 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 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 of this standard or for additional standardsand should be address
