Unique Bargains 8.8 Grade M6x20mm Full Threaded Left Hand Thread Hex Head Bolt 4pcs

Made of carbon steel material black oxide finish hex head left hand reverse thread design. Fixing component industrial and construction fasteners. To tighten a reverse threaded screw you turn it counter clockwise.To loosen a reverse threaded screw you turn it clockwise. Used widely in home office and factory appliance communication equipments ship assembly and other machinery industry.