10.9 Grade M6x10mm Round Head Inner Hex Socket Left Hand Thread Bolt 4pcs

Made of 40Cr Steel material black oxide finish inner hex socket 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 turn it clockwise. Used widely in home office and factory appliance communication equipments ship assembly and other machinery industry.