Self-Clinching Nuts Strong internal threads in sheets as thin as0.03"/0.8mm.Fastener remains flush with both sides in sheets as thin as 0.06"/1.5mm.Available with round or hexagon.Thread sizes M3 to M8.Floating action compensates for mating hole misalignment.Available with locking and non-locking threads.Have locking ferformence without damaging mating threads.Interally thread fasteners for mounting into PC boards.