Wing nut for precast construction parts 1.Material: Carbon Steel, Mild Steel, brass copper, broze, aluminium bronze, Black Wing Nuts1.Material: Carbon Steel, Mild Steel, brass copper, broze, aluminium bronze, sillicon bronze2.Finish: nickel, chrome, zinc, hot dip galvanized, gold plated or as requested3.Standard: GB, DIN, BSW, ASTM, ISO, etc precast construction parts Wing nut