Ọdịdị ígwè ọkụ bụ usoro nhazi ígwè na-eto eto ma dị mkpa. A na-eji ya eme ihe n'ozuzu ụlọ ọrụ mmepụta ihe, ọrụ ugbo, azụmahịa, na ụlọ ọrụ. Ejikwa ya mee ihe n'ịgbakwụnye ala, gbanwee, na wusie ụlọ ochie ike, yana n'ebe ndị na-enweghị ihe eji ewu ụlọ na ebe ndị njem na-adịghị mma. Usoro ihe owuwu siri ike yana ụlọ ndị a na-ebugharị na nke mbughari bụ ndị nwe ya masịrị nke ukwuu. Ihe dị mkpa maka anyị mgbe anyị na-ewu ụlọ nchara ọkụ ndị a bụ kposara nke na-akụ onwe ya. Kedu ihe ị maara maka skru nke onwe?

A na-akpọkwa “skru ndị na-egwupụta onwe” “screws”, “drilling skru”, “screws-drilling screws”, nke a na-akpọkwa “dovetail screws”, Igbo: SELF DRILLING SCREWS. Ụkpụrụ mmejuputa ya gụnyere ọkọlọtọ mba GB/T 15856.1-2002, ọkọlọtọ German DIN7504N-1995, na ọkọlọtọ Japan JIS B 1124-2003.

Ụdị nkedo a nwere ọdụ ọdụ ụgbọ mmiri, nke a na-akpọ aha ya dị ka ihe mgbagwoju anya. N'oge mgbakọ, ihe nkedo ahụ nwere ike ịkụpụ oghere etiti ahụ n'onwe ya, wee jiri akụkụ eriri dị n'akụkụ na-eme onwe ya ma wepụ ihe nkedo dabara na oghere na onye na-ebu ya. Eriri, n'ihi ya, a na-akpọ ya ịkpọrọ onwe ya na kposara skru.

Dịka ụkpụrụ mmejuputa iwu si dị, enwere ike kewaa skru ọdụ ụgbọ ala n'ime: ọkọlọtọ GB/T mba, DIN ọkọlọtọ German, ọkọlọtọ JIS Japanese, na ọkọlọtọ mba ụwa ISO.

Enwere ike kewaa ya na ngalaba ndị a dịka ojiji na ọdịdị siri dị:

1. Cross recessed pan isi-egwupụta ihe na ịme ọpịpị kposara. Cross recessed pan isi mkpọpu kposara na tapping ịghasa eri mmejuputa iwu ọkọlọtọ: GB/T 15856.1-2002 nwere ndị a nkọwa: (na-akpọkwa gburugburu isi akuakuzinwo ọdụ).

2. Gafee recessed countersunk isi-egwupụta onwe na ịme ọpịpị kposara. Cross recessed countersunk isi mkpọpu kposara na tapping ịghasa eri mmejuputa iwu ọkọlọtọ: GB/T 15856.2-2002 nwere ndị a nkọwa: (nke a makwaara dị ka flat head drill ọdụ, salad isi ikupu ọdụ).

3. Hexagon flange isi mkpọpu kposara na tapping ịghasa eri. Ọkọlọtọ mmejuputa iwu: GB/T 15856.4-2002. Ọ nwere nkọwa ndị a: (nke a na-akpọkwa ọdụ ụgbọ mmiri hexagonal Dahua, nke bụ otu n'ime skru ọdụ ọdụ. Ihe a na-ejikarị na nnukwu nkọwa.)

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4. Hexagon washer isi mkpọpu kposara na tapping ịghasa eri. Ọkọlọtọ mmejuputa iwu: GB/T 15856.5-2002. Ọ nwere nkọwa ndị a: (nke a na-akpọkwa ọdụ ụgbọ mmiri hexagonal.)

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