10pcs M5x16mm Flat Countersunk Head Hex Socket Left Hand Thread Bolt DIN7991 Electrical Repair * Fabric layers edge with

* Fabric layers edge with raising treatment

and it is not easy to rust in a humid environment for a long time

aluminum washeres are especially suitable to use in high temperature environment

* Material: 201 Stainless Steel

10pcs M5x16mm Flat Countersunk Head Hex Socket Left Hand Thread Bolt DIN7991 Electrical Repair * Fabric layers edge withMade of 40Cr Steel material,black oxide finish,hex socket flat 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.