自锁防震螺母datasheet.pdf

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1、MACLEAN-ESNAPrecisionFastenersCatalog9203611CountryClubRoadPocahontas,Arkansas72455SALES:1-800-331-6469FAX:1-870-892-8938E-mail:Fastener@MacLean-Fogg.comAMACLEAN-FOGGCOMPANY®TheESNAStoryTheESNA®storybeganin1927,whenayoungengineernamedCarlArthurSwanstromcametothiscountryfro

2、mSweden.Hebroughtwithhimalicensetomanufactureandsellauniquenewself-lockingfastener.TheInventorcalledthenewfasteneran“ElasticStop®nut”becausethenutremained“stopped”anywherealongtheboltthreads.Anon-damaginginsert,fittedintothetopofthenut,grippedtheboltthreadsfirmly,holdingth

3、enutinpositionwithoutseatingagainsttheworkorusingsecondarylockingdevices.Theonlyproblemwiththenewnutwastheinabilitytomassproducethem.Thenextfewyearswerespentperfectingaautomaticassemblymachinetoinsertthelockingdeviceintothetopofthenut.Swanstromperfectedthemachineintheearly

4、1930’sandonlyfouryearslatertheElasticStop®NutCorporationofAmericawasfounded.Athreadedfastener,abletopositivelyresistthelooseningeffectofvibration,hadlongbeensoughtbymanufacturersofeverytypeofequipment.TheElasticStop®nutprovedtobetheanswer—totallyreliable,abletoreducemainte

5、nancecostsandpreventequip-mentfailure.TheoutstandingperformanceoftheElasticStop®nutwasfurthersubstantiatedin1943whentheAirForcetestedandissuedthefirstapprovallettertouseESNA®fastenersonmilitaryaircraft,bothfuselageandengines.DuringWWIIbillionsofElasticStop®nutswereproduced

6、foreverybranchofthearmedservices.Astaggeringnumberofapplica-tionsfollowedongroundsupportandelectronicequipment.Intheyearsthatfollowed,theESNA®lineofstandardproductsexpandedtoover25,000parts.Newtypesofself-lockingfastenerswereintroducedtotheproductline...TheEslok®,self-lock

7、inghexnutsforlowcostcommercialgradeapplications,andtheCollar-lok®,ahexnutwitha360°bondednyloncollarforhighspeedautomaticassemblytech-niques.Allmetallocknutsweredevelopedforapplicationswithhighheatorweightre-ductionrequirements.Thisdiversifiedlineofreliablefastenerproductsh

8、asprovidedElasticStop®nutwithasolidfoundationforlongtermstabilityandfuturegrowth.TheESNA®