PAL Self-locking counter nut DIN 7967 Spring steel Zinc plated
Have to be spun down the thread until finger-tight, then locked by a quarter to half turn with a spanner.
Besides the clamping force of pushing down, a simultaneous radial force will be developed causing a locking action.
Are often used as a locknut above a hexagon nut
Thread pitch = 2.5mm
Hexagon head Across the Flats ( AF ) = 27mm
Height / Depth = 5.5mm
