Flange Txiv Ntseej siv nrog cov ntsia liaj qhov rooj thiab cov ntsia hlau los txuas rau thiab ua kom nruj rau qhov chaw.Qhov lawv, hom I hexagon txiv ntoo yog qhov siv ntau tshaj plaws. Chav kawm txiv ntoo C yog siv rau cov tshuab, cov khoom siv lossis cov qauv nrog qhov ntxhib saum npoo thiab tsis tshua muaj qhov tsis xav tau.Class A thiab cov chav kawm qib B yog siv rau hauv cov tshuab, cov khoom siv lossis cov qauv nrog thaj chaw zoo thiab qhov siab yuav tsum tau.Qhov tuab m ntawm hom II hexagon txiv ntoo yog thicker, uas feem ntau siv nyob rau hauv qee zaus thaum kev teeb tsa thiab disassembly feem ntau xav tau.Hexagon nyias txiv ntoo tuab m yog nyias, yog siv los txuas nrog qhov chaw ntawm thaj chaw saum npoo yog qee zaus
