Stainless Steel 304HC3 Sheet metal screw 
Material: SUS HC3 
Surface: passivated 
Size:ST5.5-6.3 
Diameter: 5.5-6.3mm 
Length: 19-38mm

These screws are designed by our professional, itspurpose is to protect our customers’ profit.this kind of screw cannot be stolen by thieves easily, because it has a pin in thedriver. when our material is SUS304 HC3???and our professionaltechnology???these screws look very light andbeautiful.