... 2.ROHS is capable 3.Grade:4.8,6.8,8.8,9.8,10.9...... Brass Set Screw,Antique Brass Screws,Brass Screw Plug . 1.What’s the ... steel is SS201,202,302,304,316...copper is shiny brass , pure copper,such as H62,H65,H68...Aluminum is good ... in most of places such as drywall,concrete,chipboard,machine,wood...2)Main export market:North America,South America,Eastern Europe ...