1.Uses:Mainly for building construction,packing and furniture. 2.Material:Q195 or 235 3.Surface treatments:screw shank ,Diamond Point，with Iron washer and Rubber washer 4.Surface treatment：Galvanized,Polished 5.Length:1/2″-10″,BWG4-12 for all kinds of round Nails. 6.Conventional packing: small plastic bag and small box of 100pcs,200pcs In cartonor bag of 10 bags/20bags/30bags 7.Loading qty 22-28tons/Shipping container Galvanized screw roofing nails with umbrella washer（4x115mm） are mainly for building construction,packing and furniture.They have screw shank with Iron washer and Rubber washer,Diamond Point.Q195 low carbon steel is used as raw material. This nail is Galvanized.According to customer needs can also do polished, mechanical galvanizing, hot dip galvanizing and other surface treatment.It also supports custom packaging, such as boxes, plastic bags and cartons.Please contact us if necessary.