1.Umbono
I-bolt yangaphandle ye-hexagonal i-accessory yentsimbi, eyaziwa ngokuba yi-screw yangaphandle ye-hexagonal, i-screw yangaphandle ye-hexagonal okanye i-bolt yangaphandle ye-hexagonal.

2.Unyango lwangaphezulu
Kwinkqubo yokwenziwa kweebholiti, unyango lomphezulu lolunye lwezikhonkco eziyimfuneko. Inokwenza umphezulu we-bolt uhlangabezane neemfuno ezithile kwaye uphucule ukuxhathisa kwe-corrosion, amandla kunye nobuhle.
Kukho iintlobo ezininzi zeendlela zonyango zomphezulu kwiibholithi, eziqhelekileyo zezi zilandelayo:
I-galvanizing: Iibholithi zintywiliselwa kwisisombululo se-zinc, kwaye i-zinc igqunywe kumphezulu we-bolts layer by layer ngokusebenzisa i-electrochemical reaction, ibenze i-rust-proof kunye ne-corrosion-resistant.
I-Hot-dip galvanizing: Emva kokuba iibholiti zenziwe, zintywiliselwa kulwelo olunyibilikisiweyo lwezinc, kwaye umaleko we-zinc wenziwa phezu komhlaba ngokusabela kweekhemikhali ukuphumeza i-anti-rust, i-corrosion-resistant kunye nezinye iziphumo.
Ukunyangwa kwe-Blackening: Ifilimu ye-oxide yensimbi emnyama yenziwa phezu kwebholithi ngokusabela kweekhemikhali ukuphucula ukuxhathisa ukubola.
Unyango lwe-Phosphating: Gxuma ibholiti kwisisombululo se-phosphating ukwenza ifilimu ye-phosphating phezu komhlaba ukuphucula ukuxhathisa ukubola.
Ukunyangwa kokuqina: Ngonyango lobushushu okanye ukutshiza umphezulu, umaleko wokugquma ngobulukhuni obuphezulu wenziwa kumphezulu webholithi ukuze kuphuculwe amandla ayo kunye nokumelana nokunxiba.
Ezi zingasentla ziindlela eziqhelekileyo zonyango lomphezulu webholithi. Iindlela ezahlukeneyo zonyango zihambelana neemeko ezahlukeneyo zesicelo kunye neemfuno. Xa usenza unyango lwe-bolt surface, kufuneka luqhutywe ngokuhambelana nemigangatho ehambelanayo kunye neenkcukacha zokuqinisekisa ukuba iibholiti eziphathwayo zihlangabezana neemfuno ezifanelekileyo zokusebenza.

3. Ukusebenza kwinqanaba
Ileyibhile yomgangatho wokusebenza yebholiti yangaphandle enehexagonal inezahlulo ezibini zamanani, ezimele ngokulandelelanayo ixabiso lamandla okuqina kunye nomlinganiselo wamandla esivuno semathiriyeli yebholithi.
Umzekelo, ibholithi enenqanaba lokusebenza 4.6 ithetha:
a. Amandla okuqina okuqhelekileyo kwesixhobo se-bolt afikelela kwi-400MPa;
b. Umlinganiselo wesivuno-amandla we-bolt material ngu-0.6;
c. Amandla emveliso yebhoti afikelela kuma-400×0.6=240MPa kwinqanaba
Inqanaba lokusebenza 10.9 iibholiti zamandla aphezulu, emva kokunyanga ubushushu, zinokufikelela:
a. Amandla okuqina okuqhelekileyo kwesixhobo se-bolt afikelela kwi-1000MPa;
b. Amandla emveliso yegama lesixhobo sebholithi afikelela kwi-1000×0.9=900MPa.

4. Umahluko phakathi kweebholiti eziqhelekileyo zangaphandle ezinehexagonal kunye namandla aphezulu angaphandle anehexagonal bolts
Iibholiti eziqhelekileyo ezinehexagonal zingaphinda zisetyenziswe, kodwa iibholiti zokuqina okuphezulu azinakuphinda zisetyenziswe.
Iibholiti eziphakamileyo ngokuqhelekileyo zenziwe ngentsimbi ephezulu ye-45 yensimbi (8.8s), i-20MmTiB (10.9S), kwaye i-bolts prestressed bolts. Kwiintlobo ze-friction, sebenzisa i-torque wrench ukuze usebenzise i-prestress echaziweyo, kunye neentlobo ezithwele uxinzelelo, ukhulule intloko ye-torx. Iibholiti eziqhelekileyo zenziwe ngentsimbi eqhelekileyo (Q235) kwaye kufuneka ziqiniswe kuphela.
Iibholiti eziqhelekileyo ziqhelekile kwibakala 4.4, ibakala 4.8, ibakala 5.6 kunye nebakala 8.8. Iibholithi zokuqina okuphezulu ngokubanzi zibakala 8.8 kunye nebakala 10.9, kwaye ibakala 10.9 lelona lixhaphakileyo.
Imingxunya ye-screw yeebholithi eziqhelekileyo ayiyomfuneko ukuba ibe nkulu kuneebholiti eziphezulu. Enyanisweni, imingxuma yebholithi eqhelekileyo incinane ngokwentelekiso.