特殊 Rivet

a) DIN 933 是全牙六角頭螺栓的標準。這些螺栓廣泛應用於需要高強度和可靠緊固的機械和結構性領域。

b) 其螺栓通常由碳鋼、不銹鋼或合金鋼製成。它們可以進行各種表面處理，如一般鍍鋅、熱浸鍍鋅或染黑, 以提高防鏽能力並增強耐用性。

a) A self-tapping screw for thermoplastics is a specialized fastener designed to create its own threads as it is driven into plastic materials.

b) These screws have wider, sharp, and deep threads, which allow them to cut into the softer thermoplastic material efficiently, creating a secure, long-lasting hold.

Screw refer to ISO 14581

Square neck under head

a) A ribbed neck screw is a type of fastener designed with a special feature on its shank or neck. Instead of a smooth or threaded surface, the neck of the screw has ribbed, serrated, or knurled features. These ribs or serrations provide additional grip and resistance when the screw is driven into a material, preventing it from rotating or loosening.