Hole-drilling self-tapping screw
作者： Werner Regensburger
DOI:
关键词:
摘要: A self-tapping screw whose stainless steel shank has a slotted free end in which plate-shaped, carbide drill bit is fastened, the being dimensioned and arranged to hole smaller than major diameter of tapping threads.
lens.org 参考文章(7)
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