... .GR1,GR2,GR3,GR5,GR7,GR9 3.M2.5~ M64*L 4.DIN912/933/7991/7984/6921,ISO7380 ... Item NameTitanium FastenerMaterialPure Titanium ... , hex nuts, hex flange nuts, wing nuts, weld nuts, square nuts, cap nuts.Washers: flat washers, spring washers, lock washers ... , structural Washers. square washer, bowl washer.Screws: machine screws, self tapping screws, self ...