Function mode of flange nut Flangenuts,alsoknownascushionednuts,Fangnuts,hexagonalflangenuts,flangenutsandsoon.Mostofthemareusedforpipeconnectionsorworkpiecesrequiringadditionalnutcontactsurfaces. Flangenutmaterial:A3lowcarbonsteel35Khighspeedsteelwire45#steel40CR35Crmoa Hardnessgrade:4grade,5grade,6grade,8grade,10grade,12grade Surfacetreatment:generallydividedintocolorgalvanized,whitegalvanized,blackgalvanizedthreekinds,andgenerallycoldgalvanized! Mainspecifications:M5M6M8M10M12M16M20(M20andabovespecificationsandM14M18flangenutsarenotcommonlyused) Flangenutsandgeneralhexagonalnutsarebasicallythesamesizeasthreadspecifications,butcomparedwithhexagonalnuts,theyaregasketsandnutsinone,andhaveanti-slipthreadunderneath,whichincreasesthesurfaceareacontactbetweenthenutandtheworkpiece.Comparedwiththecombinationofordinarynutsandgaskets,theyaremoresolidandhavegreaterpullingforce. GenerallycommonflangenutspecificationsaregenerallybelowM20,becausemostflangenutsareusedinpipesandflanges,sosubjecttoworkpiececonstraints,flangenutspecificationsarelessthannuts.MostoftheflangenutsaboveM20areflatflanges,thatis,therearenoteethontheflangesurface.Mostofthesenutsareusedinsomespecialequipmentandspecialplaces.Generally,thereisnospotinthesalesfactory.

2018-10-24

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Two Knowledge of Hardware Stainless Steel Fasteners Fastenersusingstainlesssteelasmaterialcanbesaidtohavegreatadvantagesinallaspectsofmanufacture,useortreatment.Therefore,althoughthecostoffastenersusingstainlesssteelasmaterialitselfishigherandthelifecycleisrelativelyshort,itstillbelongstoamoreeconomicaloneinthesolutionoffasteners.   Magneticproblemsofstainlesssteelfasteners  Ifstainlesssteelisusedasthemainmaterialforfasteners,themagneticpropertiesofstainlesssteelitselfshouldalsobeunderstood.Stainlesssteelisgenerallyconsideredtobenon-magnetic,butinfact,austeniticseriesmaterialsafteracertainprocessingtechnology,itispossibletohaveacertaindegreeofmagnetic,butitisalsoinaccuratetoconsidermagnetismasacriterionforjudgingthequalityofstainlesssteelfasteners.  Intheselectionoffasteners,whetherthestainlesssteelmaterialhasmagnetismdoesnotindicateitsquality.Infact,someChromium-Manganesestainlesssteelisjustnon-magneticstainlesssteel.Chromium-manganesestainlesssteelinstainlesssteelfastenerscannotreplacetheuseof300seriesstainlesssteel,especiallyinhigh-mediumcorrosiveworkingenvironment.  UseofNickelinFasteners  Fastenersusedtorelymoreonnickelintheprocessofusingstainlesssteelasmaterial,butthepriceoffastenershasalsobeengreatlyaffectedbytherisingglobalpriceofnickel.Inordertoalleviatethecostpressureandimprovethecompetitivenessoffasteners,manufacturersoffastenershavespeciallysearchedforalternativematerialstoproducestainlesssteelfastenerswithlownickelcontent.

2018-10-24

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The total value of China's fasteners import and export in the third quarter is 2.05 billion US dollars. AccordingtothestatisticsofChinaCustoms,thetotalimportandexportvalueoffastenersinthethirdquarterof2017was2.05billionUSdollars,anincreaseof6.2%overthesameperiodlastyear(thesamebelow);thetotalimportandexportvolumewas784.4milliontons,adecreaseof4.7%overthesameperiodlastyear.Amongthem,totalexportsincreasedby3.4%to$1.253billion,totalimportsby10.2%to$796million,andtradesurplusby$457millionto$490millioninthesameperiodlastyear,whichnarrowed.  Accordingtotheabovedata,comparedwithlastyear,inthethirdquarterof2017,thenumberofimportsandexportsoffastenersinChinadecreased,andthetotalvalueofimportsandexportsincreasedsignificantly,whichshowsthattheunitpriceofproductsincreasedsubstantiallyinthethirdquarter.Inthesameperiod,underthepressureofenvironmentalprotectionstormandtherisingpriceofrawmaterials,thefastenerindustryandenterpriseshavesufferedaheavyblow.However,withtheresumptionofenterprises,theexportsituationoffastenersinChinahasgraduallyimproved,withtheexportvolumereaching703,000tonsinthethirdquarterofthisyear,adecreaseof6.5%.  Globally,thetopfivecountries(orregions)offastenerimportsinthethirdquarterareJapan,Germany,theUnitedStates,TaiwanPengGoldenHorseCustomsZoneandSouthKorea.TheaverageunitpriceoffastenerimportsfromtheUnitedStatesisveryhigh,whichisabout12.414USdollarsperkilogram.InChina,thetopfivefastenerimportprovincesareShanghai,Jiangsu,Guangdong,BeijingandLiaoning,amongwhichtheimportunitpriceofGuangdongProvinceisveryhigh,whichis12.781USD/kg.  Onthecontrary,inthethirdquarter,thetopfivecountries(orregions)offastenerexportvalueinChinaweretheUnitedStates,Japan,RussianFederation,GermanyandHongKong,China.TheaverageunitpriceoffastenerexporttoHongKongwasveryhigh,whichwas$5.663/kg.Fromthedomesticpointofview,thetopfivefastenerexportprovincesinChinaareZhejiang,Jiangsu,Guangdong,ShanghaiandShandongprovinces,amongwhichtheexportunitpriceofGuangdongprovinceisveryhigh,atUS$3.419perkilogram.  Overall,inthethirdquarterof2017,thetrendofChina'sfastenersimportandexportcontinuedtostabilizeandimprove,withthetotalvolumerisingsteadilyandthequantitydecreasingnarrowly.Ontheonehand,China'sforeigntradesituationisstillcomplex,unstableanduncertain,andsomeofthedifficultiesitfacesarenotshort-term.Ontheotherhand,therearestillmanyfavorableconditionsforthedevelopmentofforeigntrade.Withoutmajorrisks,China'sforeigntradestillhasalotofroomfordevelopmentinthefuture.Between.Atthepolicylevel,whilefurtherpromotingthesteadygrowthofforeigntrade,itwillbringunexpectedgainstotheimportandexportvolumeoffasteners.

2018-10-24

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Development Trend of High Strength Fasteners and General Parts China'smechanicalfastenersandgeneralpartsmarketsaleshaverankedintheforefrontoftheworld,Chinahasbecomeamajormanufacturingcountryofbasicparts.Atpresent,themainproblemsoftheindustrydevelopmentarethattheindustryislargebutnotstrong,andthestructuralcontradictionsareprominent.Facedwithopportunitiesandchallenges,thelaggingdevelopmentofbasicpartsandcomponentshasattractedgreatattentionofthestate.    (1)Achievements  1.Afteryearsofdevelopment,theindustryofgeneralmechanicalpartsandcomponentshasformedalarge-scale,well-categorizedandsolid-basedindustry:therearetensofthousandsofenterprisesofgeneralmechanicalpartsandcomponentsinChina,andmorethan5000enterprisesofabove-scaleproduction,ofwhichabout200arethemainbackboneenterprises,withannualsalesexceeding25billionyuanandexportsexceeding7billiondollars.Thisisthecase.ThesalesvolumeofChina'sgeneralmechanicalpartsmarkethasrankedamongthetopintheworld,andChinahasbecomeamajormanufacturingcountryofbasicparts.  2.Industrialtechnologyhasbeensignificantlyimproved,andmarketcompetitivenesshasbeenfurtherenhanced:theannualaveragegrowthratehasbeenmaintainedformanyyears,theindustrialtechnologyhasbeensignificantlyimproved,theproductstructurehasbeencontinuouslyoptimizedandimproved,andthedomesticandforeignmarketshavedevelopedstrongly.Thedomesticmarketsharehasreachedabout85%.Itprovidesmostoftheaccessoriesformilitaryprojects.Theindependentmatchingabilityofmajortechnicalequipmenthasbeensignificantlyimproved.Theimportandexportvolumehasincreasedsubstantially,withanaverageannualexportgrowthrateof30%.Ithasbecomeamajorexporterofmechanicalandelectricalproducts,anditsinternationalcompetitivenesshasbeenfurtherenhanced.Thetotalimportandexportvalueofgeneralcomponentshasbecomethemainbodyofthetotalimportandexportvalueofthelargeindustryofmechanicalbasiccomponents.Itsimportvalueaccountsforabout80%andexportvalueaccountsforabout60%.  3.Thelevelofenterprisemanagementandtheconceptofdevelopmenthavemadeaqualitativeleap,andthequalityofmanagementandoperationofenterprisemanagementhasbeensignificantlyimproved.Enterpriseleadersattachimportancetotheuseofadvancedequipmentandadvancedtechnology,thequalitymanagementofenterprises,thetrainingandtrainingofenterpriseemployees,andtheconstructionofenterprisesoftwarestrength.Enterprisemanagementischangingfromextensivemanagementtorefinement.Thedirectionoffinemanagementisdeveloping.  (2)Problems:Atpresent,themainproblemsinthedevelopmentoftheindustryarethattheindustryislargebutnotstrong,andthestructuralcontradictionsareprominent,whicharemainlymanifestedinthefollowingaspects:  1.Keycomponentsareheavilydependentonimports,andcoretechnologiesaresubjecttohumanconstraints:in2010,theindustryimported13.5billionUSdollars,exported7billionUSdollars,andhadatradedeficitof6.5billionUSdollars.Coretechnologiessuchasautomatictransmissionandtransmissionofhigh-speedtrainaresubjecttoalargenumberofimports.In2010,gearimportsamountedto10.4billionUSdollars,withadeficitof8billionUSdollars.Fastenersarebigexporters,butthedifferencebetweenimportandexportpriceisashighas6-8times.  2.Theindustrialstructureisunreasonable,andtheproductqualitygapisobvious:theovercapacityofmiddleandlow-gradeproducts,theinadequatecapacityofhigh-gradeproducts,theformationoflow-levelrepeatedconstruction,homogenizationandviciouscompetition,accordingtopreliminarystatistics:high-gradeproductsaccountforabout10%,middle-gradeproductsaccountforabout50%,low-gradeproductsaccountforabout40%.Industrialconcentrationislow,CR10isabout30%.  Thestability,consistencyandreliabilityofproductqualityaredifferent.Theproductlifeisshort,whichisgenerally30-70%ofthatofsimilarproductsabroad.Thereisaconsiderablegapwiththerequirementsofusers.Productionefficiency,energyconsumption,materialconsumption,emissions,environmentalprotectionandotherdisparitiesareverylarge.  3.Lackofadvancedtechnicalpersonnelandlowlevelofequipment:lackofadvancedinnovativetechnicalpersonnelandlackofindustrialtechnicalworkersarecommon.Atpresent,engineeringandtechnicalpersonnelaccountfor5-6%oftheemployeesintheindustry,whilelessthan2%ofthefront-linedesignandtechnologicalpersonnel.Therearefewhigh-gradeequipment,manymiddleandlow-gradeequipment,andtheproportionofhigh-gradeequipmentinEnterprisesabovethescaleisabout1%.Therearefewnumericalcontrolequipmentandmoremotor-drivenelectricequipment.Therearemoresingle-machineworkandlessautomaticandintelligentproductionequipment.Therearemoremanualspotchecksandlesson-linechecks.Thereisasignificantgapbetweenthecurrentlevelofspecialmachinesinthisindustryandthatofforeigncountries.  (3)Opportunitiesandchallenges:thesituationthatbasicpartslagbehindthedevelopmentofmainenginehasarousedgreatattentionofthestate.Thehigh-enddevelopmentofsparepartshasbecomeastrategicissueinthedevelopmentofequipmentmanufacturingindustry,andthedevelopmentmodeneedstobechangedurgently.Forthisreason,thestatehasissuedaseriesofpoliciesandmeasures,suchasthe"PlanfortheRevitalizationandImplementationofMachineryBasicPartsIndustry"andthe"TwelfthFive-YearPlanfortheDevelopmentofMachineryBasicParts,BasicManufac

2018-10-24

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