J.W. Winco Inc. offers GN 253 vibration/shock absorption mounts in inch and metric sizes. These RoHS-compliant mounts are also known as shock absorbing mounts, vibration mounts, antivibration mounts, vibration bobbins or rubber bumpers.

They are frequently used as end-stop bumpers, e.g., for conveyor trolleys, and also function well as leveling feet. They absorb most of the accumulated kinetic energy on impact and act as dampers and prevent damaging shock and rebound. They can also act as sound dampers.

Mount body is NBR synthetic rubber, vulcanized, 55 durometer (shore hardness +/-5°). Cover plate is steel, zinc plated, blue passivated, molded in. Mounts are available with tapped inserts or threaded studs made of zinc plated, blue passivated, steel, molded in. Versions with 40 or 70 durometer natural rubber material available upon request.