HIGH TENSILE : METRI VS. IMPERIAL LASS VS. GRADE METRI .

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HIGH TENSILE : METRIC VS. IMPERIALCLASS VS. GRADEMETRICIMPERIALLOW TENSILEHIGH TENSILEHIGH TENSILECLASS 4.6CLASS 8.8CLASS 10.9GRADE 2GRADE 5GRADE 8WHAT DOES 8.8 MEAN ?8 BREAKING STRENGTH 800 MPa.8 YIELD STRENGTH(WHEN THE BOLT BECOMES PERMANENTLY STRETCHED)

1606101HAHOBSONARTICLESHigh-Tensile andStainless Steel Head MarkingsImperialHead MarkingNo markings3 radial lines6 radial linesNominalSize RangeGrade andMaterialGrade 2Low or medium CarbonSteelGrade 5Medium Carbon Steel,quenched and temperedMechanical Properties(inches)Proof Load(psi)Min. YieldStrength (psi)Min. TensileStrength (psi)1/4 through 3/455,00057,00074,000Over 3/4 through1-1/233,00036,00060,0001/4 through 185,00092,000120,000Over 1 00Grade 8Medium Carbon Alloy 1/4 through 1-1/2quenched and temperedMetric BoltsHead MarkingClass and MaterialNominalSize RangeMechanical PropertiesProof Load(MPa)Min. YieldStrength (MPa)Min. TensileStrength (MPa)All sizes belowM16580640800M16 - M726006608308.8Class 8.8Medium Carbon Steel,quenched and temperedM6 - M48830940104010.9Class 10.9Alloy Steel, quenchedand temperedM6 - M489701100122012.9Class 12.9Alloy Steel, quenchedand temperedClass 50Austenitic Steel with16-18.5% Chromiumand 10-15% NickelM20 - M48–210500Class 70Austenitic Steel with16-18.5% Chromiumand 10-15% NickelM6 - M20–450700Class 80Austenitic Steel with16-18.5% Chromiumand 10-15% NickelM6 - M36–600800A4A4-70A4-80www.hobson.com.auCopyright 2016 Hobson Engineering Company Pty. Ltd. All rights reserved. Release date 10/06/2016.1

Breaking Strengthv.1.5Quality Fasteners Since 1935   August 2007

FASTENER ACRONYMS - HOBSONMEANINGACRONYM2H D/EDINDTIF436FHCSFWGrHDGHRBHRCHSFGHWHNut strength level designation (ASTM A194 Grade 2H Heavy Hex Nut)Class of thread fit for metric screwsClass of thread fit for metric nutsBearing joint as per AS4100 - bolting to be fully tensionedSnug Tight as per AS4100 (Non Bearing / Friction Joint)Friction joint as per AS4100 - bolting to be fully tensionedA Austenitic steel (300 series) / 4 Cold formed stainless 316 / 50 500 Mpa Tensile StrengthA Austenitic steel (300 series) / 4 Cold formed stainless 316 / 70 700 Mpa Tensile StrengthA Austenitic steel (300 series) / 4 Cold formed stainless 316 / 80 800 Mpa Tensile StrengthWidth Across Flats - Spanner SizeAmerican Iron and Steel Institute, specifies chemical composition of steelsAmerican National Standards InstituteAmerican Society of Mechanical EngineersAmerican Society for Testing and MaterialsAll thread - fully threaded rodSud bolt grade - Petrochemical Stud bolts for flanges Re ASTM-A193Sud bolt grade - Petrochemical Stud bolts for flanges Re ASTM-A193Sud bolt grade AISI Type 304 - Petrochemical Stud bolts for flanges Re ASTM-A193Sud bolt grade AISI Type 316 - Petrochemical Stud bolts for flanges Re ASTM-A193British AssociationButton Head Cap ScrewHardness measured with a Brinell Hardness TesterBritish StandardBritish Standard FineBritish Thread Standard WhitworthC1018 low carbon steel with a medium range manganese contentCadmium PlatingClass 3 Coating for Self drilling Screws as per AS3566.2Class 4 Coating for Self drilling Screws as per AS3566.2Countersunk HeadDouble Ended StudGerman Standards OrganizationDirect Tension Indicator - Squirter WasherHardened flat washer with dimensions per ASTM F436Flat Head (Countersunk) Cap ScrewFlat WasherImperial Grade-strength level of screw or nut (ex: Grade 2, Grade 5 or Grade 8)Hot Dip GalvanizedHardness measured on the Rockwell B ScaleHardness measured on the Rockwell C ScaleHigh Strength Friction Grip - Structural BoltingHex Washer HeadPage 1 of 2

FASTENER ACRONYMS - HOBSONMEANINGACRONYMIDIFIISOksiLWL7lb (lbs)LHLHCSLTmmMPaMTRMTSNATANPTODPh DrpsiPTFEPZROHSSAESemsSerratedSHCSSS or nside diameter-washerIndustrial Fastener InstituteInternational Standards OrganizationThousand of pounds per square inchLock WasherSud bolt grade - Petrochemical Stud bolts for flanges Re ASTM-A320PoundsLeft Hand ThreadLow Head Socket Head Cap ScrewLow Tensile Carbon Steel Class 4.6MillimeterMega PascalMaterial Test ReportMetal Thread ScrewNational Association Of Testing AuthoritiesNational Tapered Pipe ThreadOutside diameter-washerPhillips Drive (cross recess)Pounds per square inchPolytetrafluoroethylene (best known brand name Teflon)Pozi-Drive style of cross recessRistriction of Hazardous SubstancesSociety of Automotive EngineersScrew with permanantly attached washerLocking serrations on bearing face of bolt or nutSocket Head Cap ScrewStainless SteelStainless Steel Grade 304Stainless Steel Grade 316Drill point for timber self drilling screw ( will drill through thin metal into timber)Triangular thread forming screw6 Lobe Drive -Torx DriveThreads per InchUnified National - 8 threads per inch (applies to petro studs 1" and above)Unified National Coarse ThreadUnified National Fine ThreadUltimate Tensile StrengthYellow ChromateYield StrengthZinc, usually referencing zinc plating (zinc with clear chromate)Zinc Plating with Yellow Chromate topcoatPage 2 of 2

ASTM American Society for Testing and Materials AT All thread - fully threaded rod B16 Sud bolt grade - Petrochemical Stud bolts for flanges Re ASTM-A193 B7 Sud bolt grade - Petrochemical Stud bolts for flanges Re ASTM-A193 B8 Sud bolt grade AISI Type 304 - Petrochemical Stud bolts f

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