ASTM_C_954_-_15.pdf

Designation:C95415Standard 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 the 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 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 also 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.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 health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2A510 Specification for General Requirements for Wire Rodsand Coarse Round Wire,Carbon SteelC11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC847 Specification for Metal LathC955 Specification for Load-Bearing(Transverse andAxial)Steel Studs,Runners(Tracks),and Bracing or Bridgingfor Screw Application of Gypsum Panel Products andMetal Plaster BasesC1396/C1396M Specification for Gypsum BoardC1513 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-drilling 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 manufactured from Grade 1018 to 1022steel wire manufactured in accordance with SpecificationA510.5.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).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.5.1.4 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 length 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:1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 1981.Last previous edition approved in 2011 as C954 11.DOI:10.1520/C0954-15.2For referenced ASTM 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 International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2.1 General:5.2.1.1 Head Diameter The head of the screw 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.(2.84 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 length.5.2.2 Screws for Fastening Gypsum Board:5.2.2.1 Screw-head minimum diameter shall be 0.3145 i