Qhov sib txawv ntawm tus kheej-tapping screws thiab lwm yam khoom
Sep 08, 2022
Self-tapping screws muaj siab hardness, dav thread spacing, sib sib zog nqus threads, thiab tsis sib xws nto, thaum ntoo screws yog opposite. Lwm qhov sib txawv yog pom tseeb dua. Ntoo screws tsis muaj xov nyob tom qab. Ntoo ntsia hlau threads yog nyias, blunt thiab mos. Self-tapping ntsia hlau threads yog tuab, ntse thiab tawv.
