Machine screws or nuts and bolts used to attach balance weights are specifically prohibited.
2
门插销轨道应该采用机械螺丝固定在门上工厂预装的螺纹黄铜嵌入件内。
Latch track shall be attached to door by machine screws into factory installed threaded brass inserts.
3
自钻螺丝，纤维板钉，干壁钉，木螺丝，家具螺丝，组合螺丝，自攻螺丝，屋顶螺丝，机械螺丝，特殊标准件。
We are specialized in tapping screws, machine screws, self-drilling screws, construction screws and furniture screws. Custom-made screws are also available.
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