ANAMERICANNATIONALSTANDARDASMEB18.2.1-2012Square,Hex,HeavyHex,andAskewHeadBoltsandHex,HeavyHex,HexFlange,LobedHead,andLagScrews(InchSeries)(RevisionofASMEB18.2.1-2010)ErratatoASMEB18.2.1-2012Square,Hex,HeavyHex,andAskewHeadBoltsandHex,HeavyHex,HexFlange,LobedHead,andLagScrews(InchSeries)TheerratacorrectionslistedbelowapplytoASMEB18.2.1-2012.ThesecorrectionswillbeincorporatedintothenexteditionofB18.2.1.PageLocationChange15Table8InNote(3),formulafor“LG,max.”corrected(seeoverleaf)194.9(c)(1)“SAE”correctedtoread“SAEJ429”24Table14Datum“A”addedtostraightnesscalloutforconsistencywithTables1,3,4,5,7,and8(seeoverleaf)THEAMERICANSOCIETYOFMECHANICALENGINEERSTwoParkAvenue,NewYork,NY10016-5990July2013M4412ETable8DimensionsofHexFlangeScrews(Cont’d)MaximumTransitionMaximumRingTRingBBasicThreadLength,LTThreadLength,YRunout[Note(3)][Notes(3)and(4)]InsideInsideNominalSizeofDiameterDiameterThicknessorBasicMajorMinimumBearingForScrewsForScrewsForScrewsForScrewsDiameterofBearingSurfaceWithL≤WithL>WithL≤WithL>+0.0000Minimum+0.0000+0.0000ThreadDiam.,B1FIM6in.6in.6in.6in.−0.0003Thickness−0.0003−0.00031⁄40.25000.4800.0100.7501.0000.4000.6500.40930.5000.43800.11865⁄160.31250.6000.0110.8751.1250.4170.6670.54830.5000.58200.14573⁄80.37500.7300.0121.0001.2500.4380.6880.61830.5000.65500.17297⁄160.43750.8500.0131.1251.3750.4640.7140.68530.5000.73000.21001⁄20.50000.9800.0141.2501.5000.4810.7310.82530.5000.87500.23719⁄160.56251.1000.0151.3751.6250.7500.7500.89530.5000.95000.26435⁄80.62501.2300.0171.5001.7500.7730.7731.03430.5001.09500.29143⁄40.75001.4700.0201.7502.0000.8000.8001.23430.5001.31200.3557GENERALNOTE:Refertosection4forfurtherinformation.NOTES:(1)HeadacceptabilityshallbedeterminedusingthetworingsdescribedinTable8.RingBshallbeplacedonthescrewheadfollowedbyRingT.TheheadisacceptableifRingTdoesnotcontactRingBafterbothringsareinplaceonthehead.(2)Thetopsurfaceoftheflangeshallbeconicalorslightlyrounded(convex).Radius,R2,appliesbothatthecornersandattheflatsofthehexagon.The...
