PEMFLEX® Self-Locking Fasteners LK, LKS, LKA

The PEMFLEX® design provides MIL-N-25027 locking performance without damaging mating threads. Thread sizes #2 to #10 and M2.5 to M5.

All-metal, self-locking fasteners are available in steel, stainless steel, and aluminum. Types LK (steel) and LKS (stainless) are treated with a black dry film lubricant for better locking performance. Type LKA (aluminum) must be used with a lubricated screw. The PEM design utilizes two rugged, semicircular flexing jaws instead of several less-supported segments. The greater ruggedness and retention of this PEMFLEX action prevents relaxation and loosening of the fastener in severe service.