1 . Perfect corrosion resistance.Black hex socket cap screws are plated dacromet with RoHS complaint .
2 . Not easy to be broken
3. Standard dimension and strict tolerances ,
4 . Easy operation
5 . Free burrs or scratch .
1 .Operated by a hex wrench
2 . Pre-drilled hole before installation ..
3 . Far from acid and chemical conditions .
4 . Do not strike cap screws machine into material .
Black dacromet socket cap screws are used to various fileds with high corrosion resistnace requested .