1.Self tapping screw 2.size:3.5x25A 3.for tappling the steel 4.use in building 5.Thread type: coarse thread, fine thread Name8mm nutMaterialSWRCH22A Head type bugle, wafer, pan, pan framing Thread type coarse thread, fine thread Size3.5X25AUsageMetal Hardware series,For large shopping malls, airports, stations, research institutes, biotechnology research institutions, large dance halls.MOQ:1000 ...