New ASTM bump test helps you design safer environments with confidence.

Experts estimate that over 90 percent of all locks in use are vulnerable to bumping, enabling unauthorized entry. This growing problem prompted ASTM International to develop new testing criteria under its Standard F883-09 for determining a lock cylinder’s ability to effectively resist break-ins using lock bumping techniques.

The revised Standard has been applied in tests comparing pin tumbler locks commonly used in padlocks as well as door hardware. It establishes six grade levels of bump resistance, Grade 1 providing the least and Grade 6, the most.

Locks from just two manufacturers met Grade 6 ASTM Standards, and only those with BumpStop technology from Master Lock and American Lock exceeded Grade 6 requirements.