Plum blossom with column self tapping screw

Ho phaella ho liphapang tsa litekanyo tsa motheo tse kang hlooho ho ea holimo le botenya ba hlooho, phapang ea bohlokoa ka ho fetisisa ea litekanyetso ke phapang ea likarolo tse khoele. Likhoele tsa GB, DIN, JIS, joalo-joalo li lekantsoe ka limilimithara (MM) 'me li kopane li bitsoa metric threads. Likhoele tse kang ANSI, ASME, joalo-joalo, tse lekantsoeng ka lisenthimithara, li bitsoa likhoele tse tloaelehileng tsa Amerika. Ntle le likhoele tsa metric le likhoele tsa Amerika, ho boetse ho na le maemo a Brithani a BSW, ao likhoele tsa tsona li lekantsoeng ka lisenthimithara, tse tsejoang ka hore ke likhoele tsa Wyeth.

Likhoele tsa metric li lekantsoe ka limilimithara (MM) 'me li na le ntlha ea leino la likhato tse 60. Ka bobeli likhoele tsa Amerika le Brithani li lekantsoe ka lisenthimithara. Leino la ntlha ea leino la khoele ea Amerika le eona ke likhato tse 60, athe ntlha ea leino la khoele ea Brithani ke likhato tse 55. Ka lebaka la likarolo tse fapaneng tsa tekanyo, mekhoa ea boemeli ba likhoele tse fapaneng le eona ha e tšoane. Ka mohlala, M16-2X60 e emela likhoele tsa metric. Moelelo oa hae o tobileng ke hore bophara ba "screw" ka lebitso ke 16MM, sekontiri ke 2MM, 'me bolelele ke 60MM. Ka mohlala, 1/4-20X3/4 e emela khoele ea Borithane, ’me moelelo oa hae o tobileng ke hore bophara ba “screw” ka lebitso ke 1/4 inch (inchi e le ’ngoe = 25.4MM), ka meno a 20 ka lisenthimithara tse le ’ngoe le bolelele ba lisenthimithara tse 3/4. Ho phaella moo, ha ho buuoa ka li-screws tsa Amerika, UNC le UNF hangata li eketsoa ka mor'a ho emela li-screw tsa Brithani ho khetholla pakeng tsa meno a mahoashe a Amerika le meno a matle a Amerika.

Khoebong ea rona ea letsatsi le letsatsi ea thekiso ea malapeng, litekanyetso tseo re atisang ho kopana le tsona ke GB (National Standard) le DIN (Maemo a Jeremane).
Mabapi le lihlahisoa tse sa nkhang hamonate, litekanyetso tse latelang li kopana haholo le tsona: GB30; GB5783; GB5782; GB62; GB6170; GB818; GB819; GB845; GB846; GB70; DIN912; DIN933; DIN931, joalo-joalo Hona joale, GB30 (tekanyetso ea khale ea naha) e nkeloe sebaka ke GB5783 (tekanyetso e ncha ea naha) bukeng e tloaelehileng. GB52 (tekanyetso ea khale ea naha) e nkeloe sebaka ke GB6170 (tekanyetso e ncha ea naha) bukeng e tloaelehileng.

Ka 1986, naha ea rona e thehile maemo a macha bakeng sa likarolo tse tloaelehileng, tse tsejoang ka hore ke maemo a macha khoebong. Tse sebelisoang haholo ke GB5780, GB5781, GB5782, GB5783, le GB5784. GB5780 ke hexagonal hlooho e teteaneng molamu halofo ea meno sekoti se nang le boemo bo nepahetseng ba C, se ka nkeloang sebaka ke GB5782 (GB5782 ke hexagonal hlooho e teteaneng molamu o tletseng leino le nang le boemo bo nepahetseng ba A le B). GB5781 ke hexagonal head full tooth screw e nang le boemo bo nepahetseng ba C. GB5783 e ka sebelisoa e le sebaka (GB5783 ke hexagonal head full tooth screw e nang le maemo a nepahetseng a A le B). GB5784 ke sekurufu sa hexagonal se nang le molamu o mosesaane le leino le halofo.

Phapang pakeng tsa label e ncha le ea khale ke hore lihlahisoa tsa M8, M10, M12, M14, le M22 li na le phapang pakeng tsa bophara ba mahlakoreng. Ntle le lihlahisoa tse ncha tsa M22, lihlooho tsa lihlahisoa tse ncha tsa M8, M10, M12, le M14 li nyenyane ka 1MM ho feta tsa label ea khale. Ke 13mm, 16mm, 18mm, le 21mm ka ho latellana. Leha ho le joalo, bakeng sa lihlahisoa tse ncha tsa M22, lehlakore le fapaneng la label e ncha ha e le hantle ke 2MM e kholo ho feta label ea khale, kahoo ho lokela ho lefshoa tlhokomelo e khethehileng. Bakeng sa botenya ba hlooho, ho na le phapang e fokolang pakeng tsa litekanyetso tse ncha le tsa khale, tse ka sebelisoang ka mokhoa o ts'oanang maemong ao litlhoko li seng thata haholo.

Phapang pakeng tsa tekanyetso e ncha le ea Jeremane e itšetlehile ka lihlahisoa tsa lihlahisoa tsa M10, M12, M14, le M22, tse fapaneng ka bophara ba mahlakoreng. Hlooho ea moeli o mocha oa M10, M12, M14 e lokela ho ba 1MM e nyane ho feta tekanyetso ea Jeremane. Sehlahisoa se secha sa M22 se na le bophara ba hlooho e bophara ba 2MM ho feta bophara bo tšoailoeng, 'me lihlahisoa tse ling kaofela li ka sebelisoa ka ho fapanyetsana.

Bakeng sa linate tsa hexagonal, litekanyetso tse sebelisoang hangata li kenyelletsa GB52, GB6170, GB6172, le DIN934. Phapang e kholo lipakeng tsa tsona ke hore GB6170 e tenya ho feta GB52, GB6172, le DIN934, e tsejoang ka hore ke linate tse teteaneng. Ho phaella moo, ho na le phapang ka mathōko. Letotong la linate tsa M8, likhahla tsa DIN934, GB6170, le GB6172 ke 13mm, e nyane ka 1MM ho feta moeli oa 14mm oa GB52. Bakeng sa linate tsa M10, mathōko a DIN934 le GB52 ke 17mm, e leng 1MM e kholo ho feta likhahla tsa GB6170 le GB6172. Bakeng sa linate tsa M12, mathōko a DIN934 le GB52 ke 19mm, e leng 1MM e kholo ho feta 18mm bohale ba GB6170 le GB6172. Bakeng sa linate tsa M14, moeli o fapaneng oa DIN934 le GB52 ke 22mm, e leng 1MM e kholo ho feta moeli o fapaneng oa GB6170 le GB6172, e leng 21mm. Ntle le moo, nate ea M22 e na le 32MM e fapaneng le DIN934 le GB52, e nyane ka 2MM ho feta 34MM e fapaneng le GB6170 le GB6172. GB6170 le GB6172 li na le bophara bo lekanang hantle ntle le botenya ba tsona bo fapaneng. Litlhaloso tse ling kaofela li ka sebelisoa ka mokhoa o fapaneng ntle le ho nahana ka botenya.