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Semi-round taub hau ntsia liaj qhov rooj
DIN 603 carriage bolts feem ntau yog tsim los ntawm cov khoom siv siab-zoo kom ntseeg tau tias kev ua tau zoo thiab ua haujlwm ntev.
Kev piav qhia
tus cim
Khoom siv
DIN 603 carriage bolts feem ntau yog tsim los ntawm cov ntaub ntawv zoo kom ntseeg tau tias kev ua tau zoo thiab kav ntev. Cov pa roj carbon steel yog cov khoom siv feem ntau, tshwj xeeb hauv qib xws li 4.8, 8.8, thiab 10.9. Qib qis-qib carbon steel bolts, zoo li qib 4.8, muaj lub zog yooj yim thiab tsim nyog rau kev siv lub hom phiaj dav dav uas qhov kev xav tau ntawm cov load tsis siab heev. Siab dua - qib carbon steel bolts, xws li 8.8 thiab 10.9, tuaj yeem ua kom sov - kho kom lawv lub zog tensile, hardness, thiab toughness, ua rau lawv muaj peev xwm tiv taus hnyav dua thiab xav tau ntau dua. Txhawm rau tiv thaiv cov pa roj carbon steel bolts los ntawm corrosion, kev kho saum npoo muaj xws li zinc plating, dub oxide txheej, thiab kub-dip galvanizing.
Rau cov ntawv thov uas xav tau kev tiv thaiv corrosion zoo dua, stainless hlau yog qhov kev xaiv zoo tshaj. Stainless hlau qib 304 thiab 316 yog dav siv. 304 stainless hlau muab zoo dav dav - lub hom phiaj tiv thaiv corrosion, ua rau nws haum rau sab hauv tsev thiab sab nraum zoov daim ntaub ntawv nrog rau nruab nrab ib puag ncig raug. 316 stainless hlau, nrog nws cov ntsiab lus molybdenum siab dua, muaj kev tiv thaiv zoo rau cov tshuaj hnyav, dej ntsev, thiab cov xwm txheej huab cua, ua rau nws zoo tagnrho rau cov dej hiav txwv, tshuaj, thiab zaub mov - kev lag luam, nrog rau cov haujlwm sab nraum zoov hauv ntug dej hiav txwv.
Hauv qee qhov xwm txheej tshwj xeeb uas yuav tsum muaj cov khoom tsis yog xim hlau, xws li hauv cov ntawv thov hluav taws xob rwb thaiv tsev lossis rau qee yam khoom siv kho mob, cov bolts tuaj yeem ua los ntawm nylon lossis lwm yam khoom siv yas. Cov bolts uas tsis yog xim hlau no yog lub teeb yuag, hluav taws xob rwb thaiv tsev, thiab tiv taus tshuaj lom neeg corrosion, muab qhov tshwj xeeb zoo hauv cov haujlwm tshwj xeeb. Tsis tas li ntawd, tooj dag thiab txhuas tuaj yeem siv rau kev nqa nqa bolts hauv cov ntawv thov uas cov khoom zoo li hluav taws xob conductivity, cov yam ntxwv tsis sib nqus, lossis qhov hnyav yog qhov tsim nyog.
Cov Qauv Khoom
Cov khoom kab ntawm DIN 603 carriage bolts suav nrog ntau yam qauv categorized los ntawm qhov loj, ntev, xov hom, thiab qib zog:
Txheem DIN 603 Carriage Bolts: Cov no yog hom yooj yim tshaj plaws, muaj nyob rau hauv ntau qhov ntau thiab tsawg metric. Txoj kab uas hla feem ntau yog nyob ntawm M6 txog M36, thiab qhov ntev yuav txawv ntawm 20mm txog 300mm. Standard bolts feature ib puag ncig lub taub hau thiab ib lub caj dab square, uas yog ib tug yam ntxwv tsim ntawm carriage bolts. Lub caj dab square tiv thaiv lub ntsia liaj qhov rooj los ntawm kev tig thaum lub txiv ntseej nruj, ua kom muaj kev ruaj ntseg zoo. Standard bolts muaj ib tug ntxhib - xov suab thiab yog haum rau dav - lub hom phiaj fastening hauj lwm nyob rau hauv kev tsim kho, rooj tog zaum, thiab lub teeb - machinery manufacturing.
Siab - Lub zog DIN 603 Carriage Bolts: Engineered rau hnyav-lub luag hauj lwm daim ntaub ntawv, siab-lub zog bolts yog tsim los ntawm cov ntaub ntawv muaj zog, feem ntau alloy steel nrog siab zog qib zoo li 12.9. Cov bolts no muaj qhov loj dua thiab ntev ntev kom tiv taus cov tensile tseem ceeb thiab shear quab yuam. Lawv yog cov tseem ceeb nyob rau hauv kev lag luam chaw rau kev ruaj ntseg machinery hnyav, loj-scale structural Cheebtsam, thiab cov cuab yeej ua hauj lwm nyob rau hauv siab loads thiab vibrations. High-lub zog bolts feem ntau muaj pom lub zog qib cov cim ntawm lawv cov txiv ntseej lossis shanks rau kev txheeb xyuas yooj yim.
Tshwj xeeb - Feature DIN 603 Carriage Bolts:
Fine - Xov DIN 603 Carriage Bolts: Nrog rau cov xov me me piv rau cov qauv bolts, zoo - xov qauv muab kev hloov kho kom raug thiab zoo dua rau kev xoob. Lawv feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum tau ua kom zoo - tuning, xws li hauv cov tshuab precision, cov khoom siv kho qhov muag, thiab cov rooj tog zaum siab kawg, qhov twg yuav tsum muaj kev ruaj ntseg thiab raug ceev dua.
Ntev - Ntev DIN 603 Carriage Bolts: Tsim los rau cov ntawv thov uas xav tau cov fasteners ntev dua, xws li cov tswv cuab tuab tuab lossis cov txheej txheem sib dhos, cov ntsia hlau ntev ntev tuaj yeem muaj qhov ntev tshaj li cov qauv. Cov bolts no ua kom muaj kev ruaj ntseg los ntawm ntau cov txheej txheem ntawm cov ntaub ntawv, muab kev ruaj ntseg thiab lub zog hauv cov txheej txheem nyuaj.
Coated DIN 603 Carriage Bolts: Coated nrog cov ntaub ntawv xws li Teflon, nylon, los yog tshwj xeeb los tiv thaiv corrosion txheej, cov bolts no muaj txiaj ntsig ntxiv. Teflon - coated bolts txo kev sib txhuam thaum lub sij hawm installation, ua rau lawv yooj yim rau zawm. Nylon los yog anti-corrosion coatings txhim khu kev tiv thaiv corrosion, txhim kho hluav taws xob rwb thaiv tsev, thiab tiv thaiv cov ntsia liaj qhov rooj thiab cov ntaub ntawv fastened los ntawm cov tshuaj puas.
Kev tsim khoom
Kev tsim khoom ntawm DIN 603 carriage bolts suav nrog ntau cov kauj ruam meej thiab nruj zoo - tswj kev ntsuas:
Kev npaj khoom siv: Cov ntaub ntawv zoo heev, xws li steel tuav, stainless hlau rods, yas pellets, los yog tooj dag / txhuas blanks, yog sourced. Cov ntaub ntawv raug ua tib zoo tshuaj xyuas rau cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab qhov zoo ntawm qhov chaw kom ua tau raws li cov qauv tsim khoom. Cov ntaub ntawv hlau raug txiav rau hauv qhov ntev raws li qhov xav tau ntawm qhov loj me.
Kev tsim: Hlau bolts feem ntau yog tsim los ntawm kev txias - taub hau lossis kub - forging txheej txheem. Txias - taub hau yog ib txoj hauv kev tsim cov bolts me me, qhov twg cov hlau yog zoo li lub taub hau, square caj dab, thiab shank daim ntawv siv tuag nyob rau hauv ib los yog ntau theem. Cov txheej txheem no muaj txiaj ntsig zoo rau cov khoom ntim siab thiab tuaj yeem tsim cov ntaub ntawv xov thiab cov duab bolt. Kub - forging yog siv rau loj los yog siab dua - lub zog bolts, qhov twg cov hlau yog rhuab mus rau ib tug malleable lub xeev thiab ces zoo li tus nyob rau hauv siab siab kom ua tau raws li qhov yuav tsum tau muaj zog thiab qhov tseeb qhov tseeb. Cov bolts uas tsis yog xim hlau feem ntau yog tsim los ntawm kev txhaj tshuaj molding, qhov twg cov yas pellets yog yaj thiab txhaj rau hauv pwm kab noj hniav los tsim cov ntsia liaj qhov rooj.
Xov: Tom qab tsim, cov bolts tau ua haujlwm threading. Rau cov hlau bolts, xov dov yog ib txoj kev nyiam vim nws tsim cov xov muaj zog los ntawm txias - ua haujlwm ntawm cov hlau, txhim kho qhov qaug zog ntawm lub ntsia liaj qhov rooj. Nyob rau hauv rooj plaub uas xav tau ntau dua precision, txiav threads yuav ua hauj lwm. Cov txheej txheem threading yuav tsum tau ua tib zoo tswj xyuas kom cov xov zoo, suab raug, thiab kev sib raug zoo nrog cov txiv ntoo sib xws.
Kev kho cua sov (rau hlau bolts): Hlau bolts, tshwj xeeb tshaj yog cov uas ua los ntawm cov pa roj carbon steel los yog hlau alloy, tej zaum yuav raug kev kho cua sov txheej txheem xws li annealing, quenching, thiab tempering. Cov txheej txheem no ua kom zoo dua cov cuab yeej ntawm cov bolts, suav nrog kev ua kom lawv lub zog, hardness, thiab toughness, kom tau raws li cov kev thov tshwj xeeb.
Surface Treatment (rau hlau bolts): Txhawm rau txhim kho corrosion tsis kam, zoo li, thiab ua haujlwm zoo, cov hlau bolts tuaj yeem ua rau ntau qhov chaw - kev kho mob. Zinc plating cuam tshuam rau hauv cov bolts hauv zinc - nplua nuj daws kom tso cov txheej txheem tiv thaiv. Kub - dip galvanizing coats lub bolts nrog ib tug thicker thiab ntau check txheej ntawm zinc. Dub oxide txheej tsim ib txheej nyias, dub, corrosion-resistant txheej los ntawm cov tshuaj tiv thaiv. Txheej nrog lwm cov ntaub ntawv xws li Teflon los yog nylon kuj ua tiav los ntawm cov txheej txheem tshwj xeeb kom ua tiav qhov kev xav tau kev txhim kho.
Kev soj ntsuam zoo: Txhua pawg ntawm DIN 603 carriage bolts raug tshuaj xyuas nruj heev. Dimensional checks yog ua los xyuas kom meej tias lub ntsia liaj qhov rooj txoj kab uas hla, ntev, xov specifications, lub taub hau puab, thiab caj dab loj raws li cov qauv. Kev ntsuam xyuas tshuab, xws li tensile lub zog thiab hardness tests, yog ua los xyuas cov load - bearing peev xwm thiab durability ntawm lub bolts. Rau cov bolts nrog cov yam ntxwv tshwj xeeb, kev sim ntxiv yog ua los xyuas kom meej qhov ua tau zoo ntawm cov nta. Kev kuaj pom pom kuj tau ua los kuaj xyuas qhov tsis xws luag, tawg, lossis txheej txheej tsis raug. Tsuas yog cov bolts uas dhau tag nrho cov kev ntsuam xyuas zoo tau pom zoo rau kev ntim khoom thiab xa tawm.
Txheej txheem kho saum npoo
Rau hlau DIN 603 carriage bolts, ob peb txheej txheem kho deg muaj los txhim kho lawv cov kev ua tau zoo:
Zinc Plating: Qhov no yog ib qho kev kho saum npoo uas cov bolts yog immersed nyob rau hauv ib tug zinc - muaj cov tshuaj los ntawm electroplating. Zinc plating tsim ib txheej nyias, adherent txheej ntawm lub ntsia liaj qhov rooj nto, muab kev tiv thaiv corrosion yooj yim. Cov txheej zinc ua raws li kev fij tseg, corroding nyiam los tiv thaiv cov hlau hauv qab. Nws yog haum rau sab hauv tsev thiab tsawg - corrosive sab nraum daim ntawv thov.
Kub - Dip Galvanizing: Nyob rau hauv cov txheej txheem no, cov bolts yog dipped rau hauv ib tug molten zinc da dej. Kub - dip galvanizing ua rau lub thicker thiab check zinc txheej piv rau zinc plating. Cov txheej txheej muab kev tiv thaiv corrosion zoo heev, ua rau cov bolts haum rau kev siv sab nraum zoov ntev, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav xws li cov chaw lag luam lossis thaj chaw ntug dej hiav txwv.
Dub Oxide Txheej: Dub oxide txheej muaj cov tshuaj tiv thaiv uas tsim ib txheej nyias, dub, corrosion-resistant txheej ntawm lub ntsia liaj qhov rooj nto. Cov txheej no tsis tsuas yog muaj qee theem ntawm kev tiv thaiv corrosion tab sis kuj muab cov bolts zoo nkauj, zoo ib yam. Nws yog feem ntau siv nyob rau hauv daim ntawv thov qhov zoo nkauj thiab nruab nrab corrosion kuj yuav tsum tau.
Cov Txheej Txheem Tshwj Xeeb: Raws li tau hais, bolts tuaj yeem coated nrog cov ntaub ntawv zoo li Teflon lossis nylon. Teflon coatings txo kev sib txhuam thaum lub sij hawm installation thiab siv, ua kom nws yooj yim rau zawm thiab loosen cov bolts. Nylon coatings tuaj yeem muab kev tiv thaiv corrosion ntxiv, hluav taws xob rwb thaiv tsev, thiab tiv thaiv kev puas tsuaj, nthuav dav daim ntawv thov ntawm cov bolts hauv ntau qhov chaw.
Daim Ntawv Thov Scope
DIN 603 carriage bolts yog dav siv nyob rau hauv ntau yam kev lag luam thiab kev siv:
Kev lag luam kev tsim kho: Hauv kev tsim kho, cov bolts no yog siv rau fastening ntoo beams, joists, thiab structural Cheebtsam. Lub caj dab square tsim tiv thaiv lub ntsia liaj qhov rooj los ntawm kev tig thaum lub txiv ntoo yog nruj, ua kom muaj kev sib txuas ruaj khov hauv cov qauv ntoo. Lawv kuj tau siv rau hauv cov hlau - rau - hlau lossis hlau - rau - ntoo kev sib txuas hauv lub tsev ua haujlwm, muab kev ruaj ntseg fastening rau ob qho tib si hauv tsev thiab kev lag luam.
Furniture Manufacturing: Hauv kev tsim cov rooj tog zaum, DIN 603 carriage bolts feem ntau yog siv los ua cov rooj tog zaum loj, xws li rooj, rooj zaum, thiab txee. Lub taub hau puag ncig muab qhov du thiab zoo nkauj ua tiav, thaum lub caj dab square ua kom muaj kev ruaj ntseg sib koom ua ke. Lawv tshwj xeeb tshaj yog pab tau rau kev koom nrog cov ntoo tuab uas yuav tsum muaj kev sib txuas kom ruaj khov thiab ruaj khov.
Automotive thiab Tsheb thauj mus los: Hauv kev lag luam automotive, cov bolts no yog siv los sib sau ua ke cov tsheb, lub cev vaj huam sib luag, thiab ntau yam khoom siv tshuab. Lawv lub zog thiab kev ntseeg siab ua rau lawv tsim nyog rau kev tiv thaiv kev vibrations thiab kev ntxhov siab thaum lub sijhawm ua haujlwm hauv tsheb. Hauv kev thauj mus los, lawv kuj tau siv rau hauv kev sib dhos ntawm cov tsheb thauj khoom, cov tsheb thauj khoom, tsheb ciav hlau, thiab tsheb npav, kom ntseeg tau cov qauv kev ncaj ncees ntawm cov tsheb.
Muaj Machinery: Nyob rau hauv kev lag luam chaw, DIN 603 carriage bolts yog ib qho tseem ceeb rau fastening qhov sib txawv ntawm machinery, khoom enclosures, thiab conveyor systems. Cov qauv siab-lub zog tuaj yeem tiv taus qhov hnyav thiab kev vibrations hauv kev lag luam ib puag ncig, ua kom lub sijhawm ua haujlwm ntev ntawm cov tshuab. Lawv tau siv los ua kom ruaj khov rau cov khoom siv tshuab loj, muab kev ruaj ntseg thiab tiv thaiv kom tsis txhob xoob lub sijhawm.
Cov khoom siv ua liaj ua teb: Hauv kev ua liaj ua teb, cov bolts no yog siv rau kev sib dhos thiab kho cov tshuab ua liaj ua teb, xws li tsheb laij teb, tshuab txiav, thiab cov kav dej. Lawv cov kav ntev thiab tsis kam tiv thaiv corrosion ua rau lawv tsim nyog siv rau hauv thaj chaw ua liaj ua teb sab nraum zoov, qhov chaw uas lawv tuaj yeem raug ya raws, av, thiab tshuaj ua liaj ua teb.
Khoom zoo
Kev ruaj ntseg fastening: Qhov tshwj xeeb square caj dab tsim ntawm DIN 603 carriage bolts tiv thaiv lub ntsia liaj qhov rooj los ntawm kev tig thaum lub txiv ntoo nruj. Qhov no ua kom muaj kev ruaj ntseg thiab ruaj khov, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas muaj kev vibration lossis txav mus los. Nws tshem tawm qhov xav tau ntxiv los tiv thaiv kev sib hloov, ua kom yooj yim rau cov txheej txheem sib dhos thiab txhim kho kev ntseeg tau ntawm cov khoom sib txuas.
Aesthetic Appeal: Lub taub hau puag ncig ntawm cov bolts no muab kev sib tw thiab pom kev zoo, ua rau lawv tsim nyog rau cov ntawv thov uas qhov zoo li qhov nrawm yog qhov tseem ceeb, xws li hauv cov rooj tog tsim khoom thiab cov haujlwm tsim vaj tsev. Qhov huv thiab sib npaug profile ntawm lub taub hau tuaj yeem ua rau lub ntsej muag zoo nkauj ntawm cov khoom kawg.
Ntau yam: Muaj nyob rau hauv ntau yam khoom, qhov ntau thiab tsawg, xov hom, thiab qib zog, DIN 603 carriage bolts tuaj yeem hloov tau yooj yim rau cov ntawv thov sib txawv. Txawm hais tias nws yog lub teeb - lub luag haujlwm fastening ua hauj lwm nyob rau hauv ib tug neeg siv khoom los yog ib tug hnyav-lub luag hauj lwm daim ntawv thov nyob rau hauv industrial machinery, muaj ib tug haum bolt qauv muaj, muab yooj yim rau hauv kev tsim thiab sib dhos nyob rau hauv ntau yam industries.
Lub zog thiab Durability: Nyob ntawm cov khoom siv, cov bolts tuaj yeem muab lub zog zoo thiab ua haujlwm ntev. High-lub zog hlau bolts tuaj yeem tiv taus cov khoom hnyav, thaum corrosion - cov ntaub ntawv tiv taus zoo li cov hlau tsis muaj steel ua kom lub sijhawm ua haujlwm ntev txawm tias nyob rau hauv ib puag ncig hnyav. Tshwj xeeb - feature bolts, xws li cov uas muaj cov txheej txheem tshwj xeeb, ntxiv dag zog rau lawv cov peev xwm hauv cov xwm txheej tshwj xeeb.
Yooj yim ntawm installation: Txawm hais tias yuav tsum tau ib lub ciaj ntswj los yog lub qhov (socket) rau zawm cov txiv ntoo, cov txheej txheem kev teeb tsa ntawm DIN 603 bolts yog qhov ncaj. Tus qauv tsim tso cai rau kev siv yooj yim ntawm cov cuab yeej siv, yooj yim sib dhos, disassembly, thiab tu ua haujlwm hauv ntau daim ntawv thov.
tiv tauj peb
Yam khoom nrov
8.8 qib
Cov txheej txheem bolts feem ntau siv stainless hlau ua cov khoom siv hauv paus, uas ua rau lawv muaj kev tiv thaiv zoo heev thiab ua haujlwm ntev.
Hexagonal flange ob tus hniav ntsug hniav laum xov
Decking screws yog tsim los ntawm ntau yam khoom siv, txhua tus xaiv kom tau raws li cov kev cai tshwj xeeb ntawm kev siv sab nraum zoov decking.
Nylon locking txiv ntoo
Hex lock nuts feem ntau yog tsim los ntawm cov ntaub ntawv zoo-cov ntaub ntawv kom ntseeg tau tias muaj kev ruaj ntseg los tiv thaiv kev ua tau zoo thiab ua haujlwm ntev. Alloy steel yog cov khoom siv feem ntau siv, tshwj xeeb tshaj yog rau cov ntawv siv hnyav.
Nyias txiv ntseej
Cov txiv ntseej nyias feem ntau yog tsim los ntawm ntau yam khoom siv, txhua tus xaiv raws li kev thov tshwj xeeb thiab kev xav tau kev ua haujlwm.
Daim npav taub hau
Forged hlau hlua clamps yog feem ntau crafted los ntawm high-lub zog cov ntaub ntawv los xyuas kom meej kev ruaj ntseg thiab txhim khu kev qha fastening ntawm hlau ropes. Cov pa roj carbon steel yog cov khoom siv feem ntau, tshwj xeeb tshaj yog nyob rau qib xws li 45 # lossis 65Mn.
Flange nrog rau sab nraud bolts
DIN6921 hex taub hau flange bolts nrog daj zinc plating, tag nrho cov hniav, thiab tsis muaj serrations, ua raws li ISO4162 thiab GB5787 tus qauv, feem ntau crafted los ntawm high-lub zog alloy hlau nyob rau hauv qib 8.8, 10.9, thiab 12.9.
Tsheb kho phab ntsa thauj tog rau nkoj
Wedge anchors feem ntau yog tsim los ntawm cov ntaub ntawv zoo - zoo los lav qhov ua tau zoo thiab ua haujlwm ntev.
Khob taub hau hexagon socket ntsia hlau
Knurled hex Allen socket cap lub taub hau tshuab screws yog feem ntau crafted los ntawm high - zoo cov ntaub ntawv los xyuas kom meej durability thiab txhim khu kev qha fastening kev kawm. Cov pa roj carbon steel yog cov khoom siv feem ntau siv, tshwj xeeb tshaj yog nyob rau qib 4.8, 8.8, thiab 10.9.
Carriage ntsia liaj qhov rooj
Kub Dip Galvanized HDG Dacromet Geomet Mushroom Lub Taub Hau Square Neck Carriage Bolts feem ntau siv cov pa roj carbon steel ua cov khoom siv hauv paus, feem ntau hauv qib xws li 4.8, 8.8, thiab 10.9.
Pem teb expansion
Of elevator expansion bolts yog crafted los ntawm hwm - qib cov ntaub ntawv los xyuas kom meej qhov siab tshaj plaws kev nyab xeeb, kev cia siab, thiab ntev nyob rau hauv siab - kev nyuaj siab elevator installation ib puag ncig.
Stainless hlau sab nraud hexagon bolts
DIN933 Ms hex txiv ntseej bolts yog crafted los ntawm ntau yam ntaub ntawv, nrog carbon steel yog ib qho kev xaiv dav, muaj nyob rau hauv ntau qib zog xws li 4.6, 5.8, 8.8, thiab 12.9.
Kev txiav tus kheej
Torx tsav lub qhov rais thav duab pob zeb ua cov ntsia hlau feem ntau yog tsim los ntawm siab - cov ntaub ntawv muaj zog kom ntseeg tau tias muaj kev ntseeg siab thiab ntev - ntev fastening hauv pob zeb thiab lwm yam ntaub ntawv masonry.
M10 Hexagon Socket Bolt Dacromet Carbon Steel Fasteners
https://www.hbfjrfastener.com/wp-content/uploads/Video-01-2.mp4 Qhov zoo: Zoo heev c...
Ntsia hlau
Xov studs feem ntau crafted los ntawm ntau haiv neeg - cov ntaub ntawv zoo, xaiv raws li cov kev xav tau ntawm ntau daim ntawv thov hais txog lub zog, durability, thiab corrosion kuj. Cov pa roj carbon steel yog ib qho ntawm cov khoom siv dav tshaj plaws, tshwj xeeb tshaj yog nyob rau qib 4.8, 8.8, thiab 10.9.
Loj tiaj taub hau hla laum xov
Dacromet pancake taub hau tus kheej - drilling screws yog crafted los ntawm ntau yam high-kev ua tau zoo cov ntaub ntawv, ua tib zoo xaiv kom tau raws li ntau haiv neeg thov. Cov pa roj carbon steel yog cov khoom siv feem ntau siv, tshwj xeeb hauv qib xws li 45 # thiab 65Mn.