1 surface treatment of socket cap screw:black Oxide,zinc plated,passivation,or client' requirment

2 good after-sale service:if any quility question ,we pay for the loose at once

3 feacture of the socket cap screw:good anti-corrosion ability

4 demension:according to your requierment

5 socket cap screw had pass the international standard

6 min order quantity of the socket cap screw:100pcs