Rag Bolt Universal : Are made from mild steel or medium/high carbon steel ... plated,hot-dip galvanized,mechanical plated ,nickel plated,blackgrades4.8,5.8,6.8,8.8,10.9,12.9widely using forindustris,constructions,electrical,powerspackingsmall ... washers, screws, anchors and threaded rods. Our strength: Can make custom-specific fastenersTimely reply your inquiry and doubtTimely production and deliveryWith ...