1. Hom Fastener Thread Hom thiab Lawv Daim Ntawv Thov - Cov Xov Coarse (UNC, Unified National Coarse): Cov yam ntxwv los ntawm cov xov tsawg dua ib nti (TPI) thiab cov xov dav dav, cov xov ntxhib yog ib qho yooj yim rau nruab thiab tuaj yeem zam cov khib nyiab me me los yog qhov tsis zoo. Lawv yog qhov zoo tagnrho rau kev siv dav hauv - lub hom phiaj xws li kev tsim kho, kev ua haujlwm ntoo, thiab kev sib dhos ntawm cov ntaub ntawv mos lossis nkig (xws li, plywood, yas), vim tias lawv muab kev tuav ruaj khov yam tsis muaj kev puas tsuaj rau cov khoom ua haujlwm. Tsis tas li ntawd, lawv muaj kev pheej hmoo tsawg dua ntawm kev hla - xov thaum lub sij hawm sib dhos ceev heev.- Cov xov zoo (UNF, Unified National Fine): Nrog cov xov sib txuas ntau dua, cov xov zoo muaj lub zog tensile ntau dua thiab cov khoom sib txuam ntau dua ntawm cov xov sib txuas. Lawv ua tau zoo nyob rau hauv kev hloov kho precision (xws li, cov khoom siv tsheb, cov cuab yeej siv dav hlau) thiab cov ntawv thov raug kev co, vim tias lawv tsis tshua muaj kev cuam tshuam rau lub sijhawm. Txawm li cas los xij, lawv xav tau ntau lub zog rau kev teeb tsa thiab muaj kev cuam tshuam ntau dua rau kev hla - xov yog tias cov xwm txheej sib dhos tsis raug tswj.- Xov Cov Chav Kawm: Xov precision yog txhais los ntawm cov chav kawm (xws li 1A/1B, 2A/2B, 3A/3B). Chav Kawm 2A / 2B yog qhov feem ntau siv rau kev siv, ntsuas lub zog thiab yooj yim ntawm kev sib dhos. Chav Kawm 3A / 3B muab kev ua haujlwm siab rau cov ntawv thov tseem ceeb xws li tshuab thiab aerospace, thaum Chav Kawm 1A / 1B muaj qhov xoob haum rau kev sib dhos ceev hauv cov xwm txheej tsis tseem ceeb.
2. Qhov tseem ceeb nto tiav rau kev tiv thaiv corrosion thiab kev ua tau zoo- Kub-Dip Galvanized (HDG): Qhov kev ua tiav no suav nrog cov immersing fasteners nyob rau hauv molten zinc, tsim ib metallurgically bonded zinc- hlau alloy txheej. Nws muab kev tiv thaiv corrosion tshwj xeeb (muaj sia nyob ntev dua 1000 teev hauv kev ntsuas tshuaj ntsev) thiab kev tiv thaiv cathodic-zinc corrodes nyiam los tiv thaiv cov hlau hauv qab txawm tias cov txheej yog khawb. HDG fasteners yog haum rau qhov hnyav ib puag ncig xws li kev tsim kho sab nraum zoov, dej hiav txwv, thiab ntug hiav txwv dej, thiab ua tau zoo nyob thoob plaws qhov kub thiab txias ntawm arctic mus txog 200℃.- Zinc Plating (Clear / Daj): Ib txheej zinc txheej electroplated nrog chromate ncej- kho, qhov ua tiav no muaj kev tiv thaiv corrosion ntawm tus nqi pheej yig. Zinc daj muab kev tiv thaiv me ntsis zoo dua li cov zinc ntshiab tab sis tsis pom zoo rau cov dej hiav txwv los yog siab -cov dej ntsev. Nws yog dav siv rau kev siv sab hauv tsev thiab cov khoom siv dav siv hauv tsev. Nws muaj tsawg kawg yog corrosion kuj, yog li nws yog feem ntau siv nrog roj los yog ciab coatings. Dub oxide yog nrov rau lub hom phiaj zoo nkauj hauv kev nthuav tawm xws li cov khoom siv hluav taws xob lossis cov khoom siv high-tech.- Stainless Steel (Passivated): Thaum tsis yog "txheej", passivated stainless hlau (xws li, A2, A4 qib) tsim cov txheej txheem oxide uas muab kev tiv thaiv corrosion zoo heev. Nws yog qhov zoo tagnrho rau kev ua zaub mov, khoom siv kho mob, thiab thaj chaw hauv hiav txwv uas ua haujlwm ntev thiab kev nyiam huv yog qhov tseem ceeb.
Key Takeaway: Sib tw xov hom rau kev sib dhos ceev, precision, thiab cov kev xav tau ntawm kev thauj khoom- ntxhib rau kev siv dav, zoo rau qhov tseeb thiab kev co kuj. Xaiv qhov chaw tiav raws li ib puag ncig: HDG rau qhov hnyav sab nraum zoov / dej ntsev ib puag ncig, zinc plating rau siv sab hauv tsev, thiab stainless hlau rau corrosion- siv yooj yim los yog tu cev.
