Lub ntsiab nta ntawm ntoo screws

Ntoo screws muaj tus pas nrig liab qab ntawm ib kawg. Lub kaum thiab suab ntawm cov xov ntawm cov nplaim taws thiab tapping screws yog txawv.
Tus kheej-tapping screws muaj siab hardness, dav xov suab, sib sib zog nqus, thiab qhov sib luag. Ntoo screws yog qhov fab ntxeev. Lwm qhov sib txawv yog qhov pom tseeb. Tsis muaj xov nyob sab nraum qab ntawm cov ntsia hlau ntoo. Tus kheej-kais screws feem ntau yuav tsum tau kho tshav kub, tab sis ntoo screws tsis tas yuav. The concept of self-tapping screws is actually very general, because they are divided into many types according to different head shapes.
Siv cov ntoo screws: zoo ib yam li tshuab screws, tab sis cov xov ntawm cov ntsia hlau xov xwm tshwj xeeb uas tuaj yeem ntsia ncaj qha rau hauv cov av ntoo (lossis ntu).