ASTM_D_5657_-_07_2014.pdf

Designation:D565707(Reapproved 2014)Standard Test Method forFluid Tightness Ability of Adhesives Used on ThreadedFasteners1This standard is issued under the fixed designation D5657;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.1.Scope1.1 This test method covers the determination of the abilityof adhesives used for locking and sealing threaded fasteners,tomake leak-tight assemblies.1.2 The values stated in inch-pound units are to be regardedas the standard.The SI units given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D907 Terminology of Adhesives2.2 SAE Standard:SAE J429 Mechanical and Material Requirements for Exter-nally Threaded Fasteners32.3 Federal Specification:FF-N-836 Nut:Square,Hexagon,Cap,Slotted,Castle,Knurled,Welding and Single Ball Seat43.Terminology3.1 Definitions:3.1.1 Many of the terms in this test method are defined inTerminology D907.4.Summary of Test Method4.1 This test method consists of subjecting an adhesive-cured nut-and-bolt assembly to 50-psi pressure and determin-ing the cured adhesives ability to make the assembly leak-tight.5.Significance and Use5.1 Thread-locking adhesives are often used on threadedfasteners in sealing applications.This test method is used todetermine an adhesives ability to provide sealing capabilitiesunder specified conditions.6.Apparatus6.1 Test Fixture,as shown in Fig.1,consisting of thefollowing:6.1.1 Pressure Vessel,provided with a means of filling withsoapy water,capable of applying,withstanding,and measuring50-psi(345-kPa)pressure of soapy water,and equipped withan air inlet and a gage for supplying and reading the pressure.6.1.2 Metal Plate,flat,smooth approximately12in.(12.7mm)thick,drilled with a38-in.(9.5-mm)hole at its center.Thehole is counterbored58-in.(15.9-mm)diameter by116in.(1.6mm)deep.The metal plate is welded to the pressure vessel.6.1.3 Rubber O-Ring or Flat Rubber Gasket,58-in.(15.9-mm)outside diameter by716-in.(11.1-mm)inside diameter by332in.(2.4 mm)thick.6.1.4 Metal Plate,used as a means of pressing the nut of theadhesive-treated test specimen against the O-ring or gasketwith sufficient force to prevent leakage between the top plateand the washer face of the test specimen nut.6.1.5 Studs and Nuts,used to clamp the fixture.7.Test Specimens7.1 Steel Bolts38-in.size,Grade 5,in accordance withSAE J429,having a minimum length of 1 in.(25.4 mm)witha hexagonal head.Use thread series Unified National Fine,24threads per inch(38by 24 UNF),or Unified National Coarse,16 threads per inch(38by 16 UNC)as agreed upon betweenthe user and the manufacturer of the adhesive.7.2 Steel NutsType II,Style 4,nominally2164in.(8.3 mm)thick,conforming to Federal Specification FF-N-836.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved March 1,2014.Published March 2014.Originallyapproved in 1995.Last previous edition approved in 2007 as D5657 07.DOI:10.1520/D5657-07R14.2For 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.3Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Procedure8.1 Degrease all nut-and-bolt test specimens,keep themclean,and store at 70 to 77F(21 to 25C)at a relativehumidity of less than 20%.8.2 Determine fluid tightness on not less than five speci-mens as follows:8.2.1 Apply test adhesive to the threads of the test bolt andnut E.Place the test bolt through the center hole in plate D andscrew the test nut onto the bolt by hand,allowing three threadsto protrude.8.2.2 Cure the adhesive in accordance with the manufactur-ers instructions,with the test specimens standing vertically onthe bolt heads.8.2.3 Cure the resulting assemblies for 24 to 26 h at 70 to77F(21 to 25C)and 45 to 55%relative humidity.8.2.4 After curing,position the fixture with the top plate upand fill the pressure vessel with room-temperature water towhich sufficient soap or synthetic wetting age