Wedge Lock Washer DIN 25201

Wedge Lock Washer, also known as Nord Lock Washer, Heico Lock Washer, or Durlok Lock Washer, utilizes the wedge locking method, which relies on tension rather than friction to prevent loosening. These washers come in pairs, featuring cams with a rise greater than the thread pitch of the bolt, installed with the cam faces against each other.

This system creates a wedge effect under the bolt head or nut, ensuring that the connection cannot loosen unintentionally. Each washer pair has cams on one side and radial teeth on the opposite side, with the difference in angles being the key to their effectiveness.