Simi finished Duplex Screws
Product Details
this is the simi-finished screws , made in duplex material.
the duplex scerws are made hot forging process , then extrude the hexagon size to precise diemnsion.
CNC turning two ends , then rolled the thread .
size can be metric , like DIN , also can be Inch like ASTM 18.2.1 .
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