Enwere ọtụtụ ụdị skru nke nwere nku, mana ha niile nwere otu njirimara. Enwere isi njirimara ise. Ngwaike ndị a na-akọwapụta atụmatụ ise nke skru nke onwe onye nwere nku:
1. Na-emekarị nke carburized ígwè (99% nke ngụkọta ngwaahịa). Enwere ike iji ya mee ihe na igwe anaghị agba nchara ma ọ bụ ọla ndị na-abụghị ígwè.
2. A ghaghị iji kposara nkedo nke onwe ya na nku ọkụ. Akụrụngwa na-agwa gị na carbon ígwè onwe-tapping kposara ga-carburized, na igwe anaghị agba nchara onwe-tapping kposara na nku mbọ ga-ike siri ike ngwọta. Iji mee ka skru nke onwe ya zute ihe eji arụ ọrụ na arụmọrụ nke ọkọlọtọ chọrọ.
3. Winged onwe-mkpọpu ihe ịghasa ngwaahịa nwere elu elu ike ike na ezi isi ike. Ya bụ, "dị nro n'ime na ike n'èzí". Akụrụngwa na-agwa gị na nke a bụ akụkụ bụ isi nke ihe arụ ọrụ chọrọ nke mbọ nku nku onwe. Ọ bụrụ na ike elu dị ala, a pụghị ịwụnye ya na matrix; ọ bụrụ na isi ahụ enweghị isi ike na-adịghị mma, ọ ga-agbaji ozugbo a kụdara ya na enweghị ike iji ya. Ya mere, "dị nro n'ime na nke siri ike n'èzí" bụ skru na-egwupụta onwe ya na mbọ nku iji mezuo ihe achọrọ.
4. N'elu nke Best Self Drilling Screw With Wings ngwaahịa chọrọ ọgwụgwọ nchebe elu, na-emekarị ọgwụgwọ electroplating. Akụrụngwa na-agwa gị na ọ dị mkpa ka e jiri phosphate (phosphating) gwọọ elu nke ngwaahịa ụfọdụ. Ọmụmaatụ: skru nke nwere nku nku na bọọdụ ahụ na-abụkarị phosphated.