EN 320 is a European Standard that specifies the test method for determining the resistance of particleboards and fibreboards to the axial withdrawal of screws. This test evaluates the mechanical performance of the board material in practical fastening applications, providing an indication of how well screws will hold when inserted into the panels.

The method involves preparing standardized board specimens, inserting screws under controlled conditions, and applying axial force until withdrawal occurs. The results help ensure that particleboards and fibreboards meet consistent mechanical and structural requirements for furniture, cabinetry, and interior construction.

For more information about this test method, please visit the official DS (Danish Standards) website.