Anti loose self locking nut

Saper Lock is special reusable self-locking loose-free Nuts!!! What is Saper Lock?   Compared to the ordinary nuts which are usable only for 1-5 times, the Saper Lock uses its special tool and can be reused until its lifetime.  Saper Lock is developed to use its special tool for tightening and loosening the nuts and also has loose proof ability without damaging the spiral axis. It has stronger clamping force and the special spring is applied therefore the nut won't be loosened by extreme shock or vibration from outside.  Summary of Saper Lock -In its tightening procedure, the thread and the frictional direction of the spring function in positive direction. -In its loosening procedure, if you use the special tool, it eliminate the friction of the spring and therefore has no damage on the nut.   Applicable field of Saper Lock -The connecting part which can be loosened by extreme vibration -The place where it's hard to be repaired -Wide range of fields with extreme shock   Applicable uses of Saper Lock  -Cars: Applicable in Steering system, transmission, Front axle, Roar arm & connecting part of the nuts, Engine accessory parts  -Public works: Bridge, Transmission tow, Construction  -Heavy equipment: Excavator, Rail trains and turnout, Crane, Light train  -Industrial machineries: Parking systen, Generator, Machine tool, Assembling tool  -Defense industry: Airplane, Tank, Ship, Space related products   List post : Saper Lock is special reusable self-locking loose-free Nuts. Saper Lock is safe. Approved for shock-vibgration loose proof test(NAS3350 test)