These set screws are made from 12.9 grade carbon steel for high hardness, durability and long service life Oxidation surface finishing provides these
Set Screw - 200pcs M3 Black Carbon Steel Socket Cup Point Grub Set Screw Assortment
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Carbon steel: These set screws are made from 12.9 grade carbon steel for high hardness, durability and long service life Excellent quality: Oxidation
200pcs M3 Black Carbon Steel Socket Cup Point Grub Set Screw
380pcs M3 Hexagon Hex Socket Cap Head Screw Set DIN912 304
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